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Skip Navigation LinksAll Horse Topics > Breeding/Reproduction > Genetics


Articles ( * = TheHorse.com members only )Date Posted
Breedings to Deceased Stallions Offered Via Injection Technique
A reproductive technique called intracytoplasmic sperm injection (ICSI), in which a sperm cell is injected directly into an egg, has resulted in foals from many mares that were no longer able to produce. However, it might be equally as important in reviving valuable genetics from stallions that have been dead for decades. The ability to freeze ... Read full story
 11/17/2009
Horse Genome Publication Concludes Kentucky Project
Four researchers from the University of Kentucky (UK) Maxwell H. Gluck Equine Research Center and a faculty member in UK's Department of Computer Science were among 58 co-authors of a research article published Nov. 6 in Science that reported the first complete sequencing and assembly of the horse genome. "This is the culmination of a ... Read full story
 11/16/2009
Horse Genome Sequence Published
Professors Jim Mickelson, PhD, and Stephanie Valberg, DVM, PhD, of the University of Minnesota College of Veterinary Medicine are among the authors of "Genome Sequence, Comparative Analysis, and Population Genetics of the Domestic Horse," to be published in the Nov. 6 issue of the journal Science. The paper will be the first published report ... Read full story
 11/6/2009
Genetic Diseases in Horses Reviewed for World Equine Vets
While genetic diseases exist in a number of horse breeds, many researchers have focused expressly on issues occurring in the Quarter Horse breed. Thanks to their efforts, genetic tests for several disorders specific to this breed are now commercially available for breeders and horse owners. "The size of the Quarter Horse industry, the commitment ... Read full story
 10/31/2009
Flaxen Color Genetic Research in Progress   *
Understanding the genetics of horse color could be a gateway to a deeper understanding of the molecular biology of the horse. Worldwide collaborative efforts, such as the Horse Genome Project, seek to identify and understand the entire DNA sequence of the domestic horse. Discovering the mode of inheritance of observable traits such as color can offer ... Read full story
 10/2/2009
Coat Color Studies Aid Health Research, Breeding Choices   *
The topic of coat color and coat patterns is of great interest to horse breeders. Color can substantially increase a horse's marketability. All else being equal, a buyer is often willing to pay more for a horse with an attractive color pattern. This has led to a wide variety of colors and patterns in many breeds and an increase in the number of breeders ... Read full story
 9/21/2009
Animal Genetic Testing and Research Lab Benefits Horse Owners   *
Established in 1986 as the Horse Bloodtyping Laboratory, the University of Kentucky Animal Genetic Testing and Research Lab (AGTRL) offers a number of testing services of value to practitioners, horse owners, and breed registries. After being housed in the Dimock Animal Pathology Building for 23 years, the program relocated to the Gluck Equine Research ... Read full story
 9/15/2009
Studies of Hereditary Traits in Horses Using New Tools   *
The horse industry in the United States is diverse. Horses are used for racing, competitive riding, showing, recreational riding, and working cattle. Today the number of horses in the United States is estimated at 9.2 million, down from 21 million around 1900, when horses were a primary source of power and transportation, but up from 4.5 million in ... Read full story
 8/15/2009
Thoroughbreds Could Contribute to Human Diabetes Research  *
Not only can Thoroughbreds provide hours of entertainment for racing enthusiasts, they could also play an invaluable role in understanding obesity and Type 2 diabetes in humans, reports a group of Irish researchers. "Over the past 400 years, the fastest and strongest racehorses have been selected for, resulting in the elite athletic animals we see ... Read full story
 8/10/2009
Equine Veterinary Group Releases Statement on Genetic Defects in Horses  *
This is the 2009 Statement on Genetic Defects released by the American Association of Equine Practitioners. It was approved in July 2009. Congenital Defects Congenital defects include all undesirable traits and pathologic conditions present at birth whether they are genetic or due to intra-uterine events that results from extra-uterine influences. ... Read full story
 8/4/2009
Endangered Przewalski's Horse Foal Born at Conservation Center  *
A Przewalski's horse foal was one of three rare animals born the evening of July 9 at the Smithsonian National Zoological Park Conservation and Research Center (CRC) in Front Royal, Va. On the same night, the Park also welcomed a clouded leopard cub and a red panda cub. Brandy and foal Keepers closely watched female Przewalski's horse Brandy ... Read full story
 7/16/2009
Riders Seek to Circle Globe, Collect DNA Samples  *
Two riders setting off on a journey around the world are also looking to compile the world's first complete equine genetic library through the unprecedented application of "crowd-sourcing." Every horse owner is encouraged to participate by sending in samples and photos. Forms and information to participate are available at theworldride.org. Representative ... Read full story
 6/23/2009
Articular Cartilage Maturation in Foals  *
During a three-year study on articular (joint) cartilage maturation, researchers at the Gluck Equine Research Center used new genetic techniques to investigate how joint cartilage changes between newborn foals and young adult horses. It is well-understood that bone structure remodels during the first few years of life and as a horse initiates strenuous ... Read full story
 6/20/2009
Cataracts in Foals  *
Horses can be born with cataracts due to developmental or heritable causes--known as congenital cataracts. Foals with cataracts often present very early in life, usually at 1 to 2 months of age. Typically, the owners will notice the whiteness in the pupil of one eye almost immediately after birth. This change is often followed closely by the other ... Read full story
 5/23/2009
Researchers Say Esophageal Problem Could be Hereditary in Friesians  *
Megaesophagus, a chronic dilation of the esophagus in conjunction with a lack of normal tone or strength, appears to occur at an atypically high rate in Friesian horses, according to a report in the proceedings from the 10th International Congress of the World Equine Veterinary Association. The report authors suggested that this might be considered ... Read full story
 5/7/2009
Early Embryonic Loss and Genetics  *
Chromosomes are large segments of DNA wound around special proteins within each cell's nucleus. They contain nearly all of the body's genetic material. Horses have 64 chromosomes (or 32 pairs) including the two sex chromosomes (XY in males and XX in females). The sire and dam each contribute 32 chromosomes to their offspring. Modern cytogenetic methods ... Read full story
 4/22/2009
Big Horse? Small Horse? Help Scientists Study Size Genes   *
What makes your horse different from the horse in the next stall? Why doesn't a Kentucky Derby contender walk like a Budweiser Clydesdale? Why don't either of them look like Thumbelina, the Guinness Book of World Records' smallest living horse? The domestic horse comes in a range of sizes, shapes, and temperaments--from the tiny American Miniature ... Read full story
 4/2/2009
AAEP 2008: Genetic Diagnosis of Polysaccharide Storage Myopathy   *
Polysaccharide storage myopathy (PSSM) is a metabolic muscle problem found in at least 20 breeds, including Quarter Horses, Paints, Appaloosas, and drafts. An affected horse suffers bouts of exertional rhabdomyolysis (tying-up), muscle tremors, and/or gait abnormalities. At the 2008 American Association of Equine Practitioners convention, held Dec. ... Read full story
 3/13/2009
AAEP 2008: DNA Testing for Twins   *
Twin foals derived from the fertilization of one egg by one sperm (the scientific term is monozygotic twins) after embryo transfer have been reported in the past, said Semira S. Mancill, DVM, a resident in Large Animal Medicine & Surgery at Texas A&M University, during a presentation at the 2008 American Association of Equine Practitioners ... Read full story
 3/3/2009
Lavender Foal Study Needs Participants   *
Researchers at Cornell University announced plans to conduct a new study focused on Lavender Foal Syndrome/Coat Color Dilution Lethal (LFS/CCDL). The project, led by Samantha Brooks, PhD, and in collaboration with Doug Antczak, VMD, PhD, and Don Miller at the Baker Institute for Animal Health, is funded in part by the Arabian Horse Foundation. The ... Read full story
 3/2/2009
Arabian Horse Association Establishes Task Force On Genetic Diseases   *
The Arabian Horse Association (AHA) of Aurora, Colo., has established an Arabian Horse Association task force on genetic diseases. The task force was created under the direction of and announced by AHA President Lance Walters. "The purpose of the task force is to have a group of AHA members regularly focused on genetic diseases," said Walters. "The ... Read full story
 2/28/2009
Equine Researchers Close to Identifying Genetic Mutations   *
The international Equine Consortium for Genetic Research (ECGR), established by Morris Animal Foundation (MAF), is making major inroads into determining the locations of genes that cause specific disease traits in horses. The ECGR is a worldwide research project led by University of Minnesota equine professors Jim Mickelson, PhD, and Stephanie Valberg, ... Read full story
 2/12/2009
AQHA Welfare Group Releases Plans for Racing, Breeding, Shows   *
The American Quarter Horse Association's Executive Committee has approved recommendations from the Animal Welfare Assurance Task Force, and the association is moving forward to implement the suggestions. The association's main objectives are to educate members and the general public on animal welfare issues and identify and eliminate any inhumane ... Read full story
 1/19/2009
$60,000 White Colt Will Be Resold  *
Florida-based pinhooker Christy Whitman bought what she thought was a unique yearling during the fifth session of the Keeneland January horses of all ages auction, and she's hoping that shoppers at a future sale will be attracted by his white coat color, which is unusual for a Thoroughbred. White Prince; white colt, hip #1832, brought $60,000 at ... Read full story
 1/17/2009
Dam Wins Battle of the Sexes to Protect Foal   *
After witnessing a rare (and unsuccessful) infanticide attack by a stallion on a one-hour-old foal, behavior researcher Meeghan Gray, PhD, from the University of Nevada, Reno, reported findings from the macabre event. "In this first report of an infanticide attempt in free-roaming feral horses, we learned that mares can successfully protect their ... Read full story
 12/29/2008
Test Reveals Arabian Sire as Carrier of Neurologic Disorder   *
A prominent Arabian horse breeding operation based in the United Arab Emirates recently became the first to publicly announce one of its stallions is a carrier of cerebellar abiotrophy (CA). Albidayer Stud released the news that World Champion Arabian stallion Marajj is a carrier for the inherited neurologic disease, for which a DNA test recently became ... Read full story
 12/15/2008
Equine Guelph Offers Genetics Course   *
Equine Guelph is offering a new online course in equine genetics. The 12-week course will provide the tools, techniques, and knowledge necessary to develop an understanding of the important role that genetics plays in the equine industry. Instructor Alicia Skelding is a University of Guelph graduate with a BSc Agr in Animal Science and plans to soon ... Read full story
 11/25/2008
Scamper Clone Offered for Commercial Breeding  *
A carbon copy of one of the world's most successful barrel horses has become the first clone to be offered at stud in the United States. "Clayton" is the clone of the AQHA gelding Gills Bay Boy, or Scamper, as he is better known. Scamper and his rider, Charmayne James, dominated barrel racing in the 1980s and early 1990s. Together they earned 10 ... Read full story
 11/15/2008
Connection Between Silver Dapple Color and Eye Abnormalities Found   *
Horses come in a fantastic array of colors from black to gray, from bays to chestnuts, and with or without varying amounts of white. The glorious spotted coats of Appaloosas are a common sight for western Canadians, as are golden palominos. On the other hand, silver dapple is a color that's still on the unusual side. The color occurs in several breeds--including ... Read full story
 11/13/2008
Equine Genome Horse Course Available for Viewing   *
The latest Horse Course from the University's of Kentucky's Livestock Disease Diagnostic Center and Gluck Equine Research Center and presented by Fort Dodge Animal Health is now available for viewing on TheHorse.com. This presentation is on the Equine Genome and tells us what genomics breakthroughs are teaching us about our horses' physiology, and ... Read full story
 10/9/2008
Polysaccharide Storage Myopathy: Search for Underlying Causes Continues  *
Despite having recently identified a genetic defect that results in polysaccharide storage myopathy (PSSM) in many horses (see articles 11654 and 12725), the underlying cause of PSSM remains to be determined in others. According to a multi-institutional study on PSSM in Belgian horses, the overproduction of glycogen (rather than a decrease in glycogen ... Read full story
 10/6/2008
Researchers Study Genetics of Contracted Foal Syndrome   *
The skeletal anatomy of a horse's front and hind limbs is comparable to the anatomy of the human hands and feet. The horse's cannon bone, or metacarpal, is the same as a bone in the palm of a hand. The human phalanges, or finger bones, are comparable to the bones making up a horse's hoof and pastern. Fortunately, most humans and horses are born with ... Read full story
 10/5/2008
Test Allows Arabian Breeders to Scan for Inherited Neurologic Disorder  *
Equine cerebellar abiotrophy is a debilitating neurologic disorder that affects Arabian horses almost exclusively, and for which there is no treatment or cure. But, thanks to the work of veterinary researchers, breeders now have access to a new DNA test that could help them detect carriers of the condition so they do not propagate the problem in their ... Read full story
 9/23/2008
Genetic Mutation for Polysaccharide Storage Myopathy Widespread  *
Veterinary researchers from the University of Minnesota have identified a gene potentially responsible for polysaccharide storage myopathy (PSSM) in Quarter Horses and, in doing so, they uncovered a number of research leads to pursue. In a recent study investigators found the gene in nearly half of 36 different breeds of horses tested. They consider ... Read full story
 9/20/2008
Clone of Show Jumper Gem Twist Born  *
A clone of champion show jumper Gem Twist is the newest addition to the stable of horses cloned by Cryozootech, a French company that banks equine genetic material. The company announced the clone's birth Sept. 15. Gem Twist, a grey Thoroughbred gelding, was named "Horse of the Year" three times, won two silver medals at the Seoul Olympic Games, ... Read full story
 9/16/2008
Shedding Light on Night Blindness in Appaloosas  *
Congenital stationary night blindness (CSNB) in Appaloosas has been linked to the leopard complex spotting in these horses. But how are these two apparently independent genetic features related? According to researchers, both CSNB and spotting pattern in Appaloosas are thought to be caused by a gene called "transient receptor potential cation channel, ... Read full story
 8/31/2008
AAEP's Walking Horse Directives Labeled Costly, Unrealistic  *
The American Association of Equine Practitioners' (AAEP) Tennessee Walking Horse Task (TWH) Force recommendations to eradicate the practice of soring drew strong reaction from Walking Horse industry members who label the directives costly and unrealistic. In a "white paper" issued on Aug. 8, the AAEP called for several changes in Walking Horse industry ... Read full story
 8/9/2008
Focus on Equine Genetics: the Ol' Gray Mare  *
For more than 100 years, equine researchers have been examining why gray horses that are losing hair pigmentation are often concurrently affected by melanomas—tumors characterized by a massive production of the pigment melanin. According to European researchers, humans cherry-picking gray coat color milleniums ago--due to the social prestige of riding ... Read full story
 8/8/2008
Special Report: Racehorse Durability  *
In this exclusive report, The Blood-Horse investigates whether the Thoroughbred racehorse is as tough today as it was 30 to 40 years ago. Editors of The Blood-Horse recently sought the answer to this question by producing a comprehensive review of 34 years of historical Thoroughbred stallion progeny records pulled from The Jockey Club's extensive database. ... Read full story
 7/24/2008
AQHA Donates $50,000 to Genetic Research Fund   *
The American Quarter Horse Foundation recently donated $50,000 to Morris Animal Foundation (MAF) to advance equine health through MAF's Equine Consortium for Genetic Research (ECGR) project. The consortium includes 18 equine research institutes in nine countries. Funding will allow scientists around the world to study genetic mutations and processes ... Read full story
 7/9/2008
A Better Way?   *
Breeders willing to risk disease or injury for the traits they desire are at the heart of the problems we face today. We've had bad news following bad news lately with the loss of some of the top horses in equestrian sports. The only silver lining to emerge in this dark storm of fatal injuries in Thoroughbred racing and eventing is that these incidents ... Read full story
 7/1/2008
Summit Speakers Discuss Equine Reproductive Technology  *
Four speakers discussed advances in assisted reproduction to wrap up the session on the emerging science of horse breeding at the Kentucky International Equine Summit, held in Lexington, Ky., April 28-29. The speakers agreed that the key is not finding new technologies for breeding, but honing in on those we currently employ with a greater understanding ... Read full story
 6/5/2008
Genetic Concentration: Too Much of a Good Thing?  *
"For years we've taught the industry about reproduction, but we haven't taught about breeding," said Gary Carpenter, executive director of the American Quarter Horse Foundation during a roundtable at the International Equine Summit, held in Lexington, Ky., April 28-29. Fellow horsemen Dan Kenny, owner of Dan Kenny Bloodstock in Lexington, Ky., and ... Read full story
 5/24/2008
First Foal Sired by Cloned Stallion Born  *
The first foal sired by a cloned stallion is now nearly a month old. The filly, named Pierazade du Vialaret, is the first get of stallion Pieraz-Cryozootech-Stallion, a clone of two-time World Champion endurance horse Pieraz. The original Pieraz is an Arabian gelding. He was cloned so that his exact genes could be perpetuated. Pieraz-Cryozootech-Stallion ... Read full story
 5/22/2008
Cataracts in Horses   *
Maria Kallberg, DVM, PhD, assistant professor at the University of Florida veterinary school, reported on cataracts in horses at the 2007 American Association of Equine Practitioners, held Dec. 1-5 in Orlando, Fla. She explained that a cataract is an opacity of the lens or lens capsule that obscures vision, as opposed to nuclear sclerosis, which is ... Read full story
 5/6/2008
First Offspring of an Equine Clone Born in Italy  *
Prometea, the blazed Haflinger who gained notoriety in 2003 as the world's first horse clone, has given birth to a colt. Today the Laboratorio di Tecnologie della Riproduzione (LTR) in Cremona, Italy, announced the March 17 arrival of Pegaso, who was produced by a single artificial insemination attempt. Continuing the family tradition of world firsts, ... Read full story
 4/29/2008
Medical and Surgical Treatment of Uveitis   *
Mary Utter, DVM, PhD, Dipl. ACVO, assistant professor of ophthalmology at the University of Pennsylvania veterinary school, continued the discussion on eyes at the In-Depth session on Ophthalmology held during the 2007 American Association of Equine Practitioners Convention, held Dec. 1-5 in Orlando, Fla. She underscored the observation made by other ... Read full story
 4/19/2008
Carolina Horsemen Trying to Save Rare Breed   *
During centuries of isolation on the Carolina sea islands, the short-legged, sway-backed Marsh Tacky horses became perfectly suited for toiling long hours in the swamps and oppressive humidity. But their wild looks and workhorse reputation--their name comes from the old English word meaning "common"--didn't exactly make them prized among horse lovers. ... Read full story
 4/15/2008
Polysaccharide Storage Myopathy: Blame It on the Genes   *
A genetic mutation in an enzyme called muscle glycogen synthase might be responsible for polysaccharide storage myopathy (PSSM)--a debilitating and life-threatening disease in horses characterized by abnormally high glycogen (the storage form of glucose) levels in skeletal muscles. PSSM is currently estimated to affect more than one-third of draft ... Read full story
 4/11/2008
Campaigns Work to Keep Endangered Draft Breeds Viable  *
Suffering dramatic drops in numbers of registered animals, several European draft horse breed societies are coming up with targeted promotional campaigns in order to keep their breeds alive. In England, the critically endangered Suffolk is an ideal horse for riders who require a sturdy mount, according to Amanda Hillier, spokesperson for the Suffolk ... Read full story
 3/28/2008
Hitting the Road for Education  *
Take more than 1,000 veterinarians and veterinary students from around the globe, some armed with presentations representing thousands of hours worth of equine research, and add to it some tartan, bagpipes, and Scottish fare. Drop it all into a festival city known for its striking castle and Georgian architecture. What's the outcome? A memorable equine ... Read full story
 2/1/2008
Retired Racehorses to Participate in Texas A&M Study   *
More than 100 horses currently being cared for by the Thoroughbred Retirement Foundation (TRF) will take part in a study at Texas A&M University that will attempt to identify genes in horses predisposed to fractures and catastrophic injuries. "We're looking for some kind of genetic trait that may make the difference," said Jana Caldwell, a PhD ... Read full story
 1/29/2008
BEVA 2007: The Genetics Revolution  *
Mapping the horse genome used to be a pie-in-the-sky type of wish for veterinary geneticists: Understanding the genetic makeup of the horse could help them unlock a plethora of equine health mysteries and improve horse care. It was a tough concept to explain to the layperson, journalist, research donor, or horse owner. But the message got through and ... Read full story
 1/13/2008
Curly Horse Farm Caters to Allergic Equestrians  *
Curly is on its way to becoming the fashion in France--not only in the hairdressers' salons, but in the stables, including a new equestrian center just north of the Riviera. Since 2000, American Bashkir Curly breeding farms have been popping up in various regions of the country, but the recent opening of the Mas de l'Air Curly breeding farm and equestrian ... Read full story
 1/5/2008
Study: Light-Colored Horses at Higher Risk of Dying from West Nile Virus  *
Researchers at the Western College of Veterinary Medicine in Saskatchewan, Canada, recently published a study indicating that light-colored horses diagnosed with West Nile virus (WNV) might be more likely to succumb to the disease than their darker counterparts. Horses included in the study were divided into three groups based on coat color: dark ... Read full story
 1/3/2008
Tobiano Gene Discoveries Mean Better Tests  *
Looking to breed for spots and have certainty about it? Breeders trying to produce horses with tobiano coloring have a new tool, available through genetic research, to help them select their breeding stock. Dr. Brooks explains her research. Watch Dr. Bailey explain the genome project. Tobiano is a common spotting pattern ... Read full story
 12/1/2007
Good Genes: Genome Research has Broad Applications for Horse Health   *
Research into the equine genome is revealing the tiny source of many big problems affecting horses. Scientists received a whole new set of tools when the first version of the equine DNA sequence--the genetic code of horses, arranged into the correct position--was unveiled in February 2007. With these tools they can better understand the physiology ... Read full story
 11/29/2007
Horse Health News Video: Ryder Report for Nov. 21   *
Watch the Nov. 21 edition of the Ryder Report. This week's stories include a report on the independent inquiry into equine influenza in Australia, which has revealed problem's in the government's quarantine service, and information on some of the projects underway in the field of equine genetics. The Ryder Report is a weekly video broadcast presented ... Read full story
 11/21/2007
New Research on PSSM Prevalence, Heritability in Progress   *
Researchers with the University of Minnesota have identified polysaccharide storage myopathy (PSSM) in 6-12% of overtly healthy Quarter Horses on six farms involved in a new study. They also said the disease could be more common within certain breeding populations. The study, published in the Sept. 1 edition of the Journal of the American Veterinary ... Read full story
 10/4/2007
MAF Beginning First Phase of Equine Genetic Research Consortium  *
Equine scientists will begin developing a unique set of research tools that will lead to major advances in the health of horses worldwide through the Morris Animal Foundation's Equine Consortium for Genetic Research. The Equine Consortium for Genetic Research is a five-year, $2.5 million project to rapidly advance equine health. Led by University ... Read full story
 7/19/2007
The Equine Genome: What it Means for the Future of Horse Health   *
The National Human Genome Research Institute announced the first assembly of the completed horse DNA sequence on Feb. 7, 2007. Why would a human health agency perform DNA sequencing on a horse? The answer is that the genetic structure and function of all mammals are similar. The best way for scientists to understand human DNA sequences is to compare ... Read full story
 7/17/2007
AAEP 2006: Glycogen-Branching Enzyme Deficiency  *
Stephanie Valberg, DVM, PhD, professor of large animal medicine and director of the University of Minnesota's Equine Center, presented information on GBED at the AAEP Convention 2006. The disorder involves glycogen storage in Quarter Horse or Paint horse foals, and it is associated with abortion or high neonatal mortality. Glycogen-branching enzyme ... Read full story
 7/16/2007
Hyperkalemic Periodic Paralysis: 14 Years Later   *
Sharon Spier, DVM, Dipl. ACVIM, PhD, associate professor at the University of California, Davis, has pioneered much of the research on HYPP. She presented updated information gleaned over the past 14 years on this disease at the 2006 AAEP Convention. The syndrome was identified in the 1980s in descendants of the Quarter Horse stallion Impressive. ... Read full story
 7/4/2007
HERDA: DNA Tests Available for Disfiguring Skin Disease  *
Scientific research has scored another significant victory in the equine world. Two DNA tests are now available to detect carrier status for hereditary equine regional dermal asthenia (HERDA), also known as hyperelastosis cutis (HC). Today horse owners desiring to know whether they own a carrier mare, stallion, or foal can have it tested at either ... Read full story
 5/28/2007
The Genetics of Champagne Coloring   *
The champagne gene is a dominant dilution gene, first documented in 1996 by Philip Sponenberg, DVM, PhD, of Virginia Tech and Ann Bowling, PhD, of UC Davis. Prior to this the champagne gene was often misidentified. Many champagnes were mistakenly called "pumpkin-skinned palominos" due to their mottled skin and golden coloration. However, the champagne ... Read full story
 5/26/2007
Appaloosa Project Researchers Investigate the Science of Spots   *
The Appaloosa Project is a research initiative being conducted by a team of researchers from Canada and the United States. It is a long-term effort designed to identify and isolate the main genes responsible for Appaloosa patterning, and to investigate key physical traits associated with these genes. The Appaloosa Project's new Web site, www.appaloosaproject.info ... Read full story
 4/27/2007
Va. Tech Researcher Using Genetics to Preserve Rare Breeds  *
A professor of pathology and genetics at the Virginia-Maryland Regional School of Veterinary Medicine in Blacksburg, Va., has been working for more than 30 years to help save a rare breed of horses. Colonial Spanish horses were the horse responsible for the Spanish conquest of the Americas, changed the culture of Native Americans, were used on cattle ... Read full story
 2/17/2007
Genome Sequence will Benefit Performance Horse Breeding, Management   *
The newly completed equine genome sequence will be an invaluable asset for those looking to breed and manage the ideal equine athlete, as well as giving researchers a whole new set of tools for investigating equine disease, according to Claire Wade, BSc, PhD, a senior research scientist at the Broad Institute, a part of the Massachusetts Institute ... Read full story
 2/15/2007
Horse Genome Map Complete  *
The first genome map of a horse is complete, providing scientists with a new set of tools for investigating equine disease, scientists at the Broad Institute, a part of the Massachusetts Institute of Technology, and the National Human Genome Research Institute (NHGRI) announced Wednesday (Feb. 7). To read the release click here. According to Ernie ... Read full story
 2/9/2007
Horse Genome Assembled; Information Available to Researchers   *
The first draft of the horse genome sequence has been deposited in public databases and is freely available for use by biomedical and veterinary researchers around the globe, leaders of the international Horse Genome Sequencing Project announced today (Feb. 7). The $15 million effort to sequence the approximately 2.7 billion DNA base pairs in the ... Read full story
 2/7/2007
Blue's Clues  *
The foal flutters his eyelids in the dawning hours during his first day of his life. He stands, wobbles around his dam, and finally nurses, showing the vigorous signs of a healthy newborn. Now that the foal has safely made its way into the world, the breeder starts inventorying exactly what she has in front of her: a colt. Strong Quarter Horse body. ... Read full story
 10/1/2006
Equids Quick to Evolve   *
Researchers with the University of Bari in Italy have discovered that equids, and particularly donkeys, evolved at a rapid pace. Their study was published in the June issue of Genomics. The researchers came this conclusion after studying centromere repositioning (CR) in equids, including the Burchelli's zebra, donkey, and horse. CR is the study of ... Read full story
 9/24/2006
Report from Horse Genome Mapping Workshop   *
The horse genome mapping workshop was held on Aug. 22 in Port Seguro, Brazil. The chair of the workshop welcomed all attendees and presenters (totalling about 200 persons), and introduced the program. During the session, Dr. Domenico Bernoco (University of California) was invited to present on Whole Genome Linkage Maps of horses, and there were 10 ... Read full story
 9/12/2006
Horse Genome Map in the Works  *
A Thoroughbred mare will soon join the human, mouse, dog, and other species on the list of mammals whose genomes have been sequenced and mapped. The National Human Genome Research Institute (NHGRI) is currently working on a high-level equine sequence, which is a major breakthrough for researchers who want to better understand and solve common health ... Read full story
 9/1/2006
Genome Chosen as $2.5-Million Consortium Project  *
Morris Animal Foundation (MAF) and the University of Minnesota's College of Veterinary Medicine (UM) announced on Aug. 9 that the foundation has committed to raise $2.5 million over five years to fund the consortium project titled "Program in Equine Medical Genetics." The MAF aims to raise up to $500,000 a year for this project, which will combine ... Read full story
 9/1/2006
Equine Medical Genetics Chosen as $2.5-Million Consortium Project  *
Morris Animal Foundation (MAF) and the University of Minnesota's College of Veterinary Medicine (UM) jointly announced on Aug. 9 that the foundation has committed to raise $2.5 million over five years to fund the top-ranked consortium project titled "Program in Equine Medical Genetics." This international project will be based out of the University ... Read full story
 8/14/2006
Morris Animal Foundation to Raise $2.5M for University of Minnesota-Lead Consortium  *
Morris Animal Foundation (MAF) selected the University of Minnesota's College of Veterinary Medicine to receive funding for the first ever Equine Consortium for Genetic Research grant. The goal of the grant is to bring together the world's best researchers in a focused, collaborative effort to improve equine health. The consortium grant, led by University ... Read full story
 8/10/2006
Owners of Endangered Equine Breeds Asked to Participate in Research Study  *
The Equus Survival Trust, working to save endangered equine breeds, invites you to participate in an equine genome research project, carried out at the College of Veterinary Medicine & Biomedical Sciences, Texas A&M University. Attention Owners / Breeders of: Ponies - Exmoor, Dales, Dartmoor, Fell, Highland, Lac La Croix, Newfoundland, Swedish ... Read full story
 8/3/2006
Horse Genome Sequence in the Works  *
"It puts a whole new set of tools in play...it's as if you are farmers that are used to relying on plows pulled by a draft animal, and all the sudden you have tractors," says Jamie MacLeod, VMD, PhD, professor of veterinary science and Knight Chair for Musculoskeletal Sciences at the University of Kentucky's Gluck Equine Research Center, of the news ... Read full story
 7/31/2006
Horse Added to Broad's Genome Stable  *
Scientists will complete high-quality genome sequence of the horse together with a catalogue of genetic differences across diverse horse breeds Long prized for its physical prowess, the horse has filled diverse and instrumental roles in human civilization, ranging from warfare and transportation to sport and agriculture. Now another chapter in its ... Read full story
 7/31/2006
University of Kentucky Researchers Play Role in Horse Genome Sequencing Project   *
The National Human Genome Research Institute (NHGRI) announced Wednesday (July 21) that it has added the horse genome to it latest sequencing targets, a project expected to provide powerful new scientific strategies and methods for research on equine health. University of Kentucky researchers from the College of Agriculture's Maxwell H. Gluck Equine ... Read full story
 7/21/2006
Agency Announces Genome Sequencing Approval  *
(edited press release) The National Human Genome Research Institute (NHGRI), one of the National Institutes of Health (NIH), yesterday (July 19) announced they approved the genome sequencing of the horse to "high-density genome coverage." Scientists had earlier reported the horse was a probable target for the high-level sequencing. (See www.TheHorse.com/ViewArticle.aspx?id=7128 ... Read full story
 7/20/2006
Degenerative Ligament Disease Reaches Beyond the Limbs  *
Researchers at the University of Georgia (UGA) College of Veterinary Medicine have discovered that degenerative suspensory ligament desmitis (DSLD), a common disorder in horses once thought to involve only ligaments in the legs, actually affects connective tissue throughout the body. As a result of the finding, lead author Jaroslava Halper, MD, PhD, ... Read full story
 7/11/2006
Landmark DNA Sequencing to Begin  *
The same government agency that completed the human genome in 2003 has identified the horse as a probable target for future DNA sequencing research. While a final decision will be announced in the near future, the Broad Institute, a member of the National Human Genome Research Institute (NHGRI), has begun preliminary work to sequence the horse genome. ... Read full story
 7/1/2006
Breed the Best to the Best  *
Genomics is a buzz word, even among scientists. The term genomics includes the entire complement of chromosomes, genes, and DNA sequences that make up humans and animals. Technological advances during the last 15 years have led to the entire genome sequencing for humans, mice, cattle, chickens, and dogs. Thousands of bacteria and viruses have been ... Read full story
 4/11/2006
Microchips, Equine Genomics on Horse Council Agenda  *
The American Horse Council 2006 National Issues Forum will feature an all-day meeting of the Equine Species Working Group as well as a discussion on equine genomics, funding for which could be included in the next farm bill authored by Congress. The National Issues Forum will be held April 2-5 in Washington, D.C. Various AHC committees and the State ... Read full story
 3/11/2006
Genome Sequencing   *
In 1991, Eliane Marti, Dr. Med. Vet., published a study as a graduate student in Switzerland, showing that chronic hypersensitivity bronchitis (a.k.a. heaves) had a strong hereditary component among Swiss horses. She meticulously defined the clinical signs and studied only those horses maintained in pastures, so as to avoid the more common allergic ... Read full story
 2/1/2006
Researchers Examine Racehorses' DNA   *
Royal Veterinary College (RVC) and Cambridge University researchers, plan to extract DNA from the bones of three of history's greatest Thoroughbred racehorses--Eclipse, Hermit, and St. Simon. By examining the genetic makeup of these horses, researchers expect to gain insight into what makes racehorses legendary. Details of the proposed study were presented ... Read full story
 12/22/2005
Researchers Examine Racehorses' DNA  *
Researchers from the Royal Veterinary College (RVC) in Hatfield and Cambridge University in England, plan to extract DNA from the bones of three of history's greatest Thoroughbred racehorses--Eclipse, Hermit, and St. Simon. Details of the proposed study were presented at the British Association Festival of Science held at Trinity College in Dublin, ... Read full story
 10/18/2005
Genetic Disease: Who's At Risk?  *
Many of today's scientific advancements are based on genetic technology, and medicine is at the cutting edge of gene discovery. Equine medicine is no different. Using the very information code for life in genes, scientists are working to: Prevent devastating or career-ending diseases through informed breeding; Gain new knowledge on conditions ... Read full story
 10/1/2005
Company Offers Commercial Cloning   *
A San Francisco, Calif., company announced in late July its intention to clone one individual's horse for profit, at a cost of $367,593 for implanting clone embryos into 100 mares plus additional patent royalties based on the number of clones that are produced and their value. The announcement marks the first U.S. commercial cloning venture devoted ... Read full story
 10/1/2005
GBED Linked to Quarter Horse Bloodlines  *
Glycogen-branching enzyme disorder (GBED) has likely been a cause of neonatal mortality in Quarter Horses for decades, according to Stephanie Valberg, DVM, PhD, who gave an update on her research on the disorder at the recent conference of the American Quarter Horse Association, held March 11-14 in St. Louis, Mo. Additionally, she reported that all ... Read full story
 3/29/2005
Progress in Solving the Horse Genome Puzzle  *
Equine researchers around the world are gearing up for the sixth International Equine Genome Workshop, to be held in Dublin, Ireland, this summer. The meeting will allow participating scientists to move one step closer to achieving their collective goal: Cracking the equine genetic code. The Workshop is coordinated by Ernest Bailey, PhD, a geneticist ... Read full story
 3/24/2005
AAEP Convention 2004: Medicine--HC/HERDA  *
In 2004, the newly clarified hereditary disease hyperelastosis cutis (HC), also known as hereditary equine regional dermal asthenia (HERDA), received much attention. One of the leading researchers into this disease is Ann Rashmir-Raven, DVM, MS, Dipl. ACVS, associate professor in the department of clinical sciences at the Mississippi State University ... Read full story
 2/13/2005
Is Arthritis Genetic?
Q: My 14-year-old Thoroughbred mare was diagnosed with arthritis about a year ago. She competed in low-level horse trials for about six years and only recently began to show signs of arthritis, but 14 seems to be a little young for such a severe case. My hope had always been to breed her at about this point in her life, but it seems a shame to breed ... Read full story
 11/1/2004
Fatal Genetic Disease Identified   *
Researchers have identified the gene mutation responsible for a disease that causes stillbirths and deaths in young foals of the American Quarter Horse breed. They have also developed a genetic test that will identify carriers of the lethal disorder, called glycogen branching enzyme deficiency (GBED), which should help breeders reduce the disease's ... Read full story
 8/1/2004
Fatal Genetic Quarter Horse Disease Identified  *
An inherited disorder called glycogen branching enzyme deficiency (GBED) in American Quarter Horses and related breeds that appears to be the cause for many unexplained stillbirths and deaths of young foals was identified by the University of Minnesota's Stephanie Valberg, DVM, PhD, Department of Clinical and Population Sciences, and Jim Mickelson, ... Read full story
 6/9/2004
Stallion Infertility and the Y Chromosome  *
Environmental factors, management, and genetics all play a part in determining a stallion's fertility. Bhanu P. Chowdhary, BVSc, AH, MVSc, PhD, associate professor in animal genomics at Texas A&M University's College of Veterinary Medicine, has turned his attention to the role of genetics, specifically on the Y chromosome, in finding causes of ... Read full story
 5/4/2004
Feeding HYPP Horses   *
Horses with hyperkalemic periodic paralysis (HYPP) need careful dietary management to reduce or eliminate its characteristic muscle dysfunction attacks. While diet won't eliminate all signs, it can make an affected horse more comfortable and useful, and even save his life. HYPP is a genetic muscle disorder tracing back to the Quarter Horse stallion ... Read full story
 5/1/2004
Joint Injections: A Good Idea?   *
If you've been around horses, particularly performance horses, for even a short while, you've probably met someone who's had a horse's joints injected. The procedure--which involves injecting medication directly into the joint to combat such problems as synovitis, osteoarthritis, and arthrosis--is now commonplace. Despite prominent use and continuing ... Read full story
 5/1/2004
Not Just Skin Deep  *
Poco Bueno was a giant among horses. Built like a rock, he possessed power and speed. He was a champion in the show ring, then retired to stud. His greatness was carried on in succeeding generations of Quarter Horses. Today, it is primarily through Poco Bueno's bloodline, say researchers at Mississippi State University and Cornell University, that ... Read full story
 4/1/2004
AQHA Board of Directors Votes on Key Rule Changes at Convention  *
The American Quarter Horse Association Board of Directors voted Tuesday on the recommendations of the AQHA standing committees as approved in the general membership meeting. The following is the final results of the vote regarding hyperkalemic periodic paralysis (HYPP) and the white rule. HYPP The board voted that foals of 2007 and later tracing to ... Read full story
 3/11/2004
AQHA Statement on HC/HERDA  *
The American Quarter Horse Association's (AQHA) statement regarding hyperelastosis cutis (HC) or hereditary equine regional dermal asthenia (HERDA): 1. AQHA is aware of the condition known as hereditary equine regional dermal asthenia, otherwise known as hyperelastosis cutis. It is on the stud book and registration commmittee agenda for discussion ... Read full story
 3/8/2004
JEB in Belgian Draft Horses   *
John D. Baird, BVSc, PhD, of Ontario Veterinary College, reviewed the cause, characteristics, and prevalence of junctional epidermolysis bullosa (JEB) in Belgians. The lethal inherited disease causes large areas of skin loss and other abnormalities in newborn foals, which usually are euthanized shortly after birth. In 2001, scientists linked JEB ... Read full story
 3/1/2004
Inherited Quarter Horse Disease Traces To Poco Bueno   *
Poco Bueno has been identified as the sireline associated with the brutal affliction known as hyperelastosis cutis (HC) or hereditary equine regional dermal asthenia (HERDA). He was a giant among horses. Built like a rock, he possessed power and speed. He made his mark in the show ring as a champion, then retired to the breeding shed. His greatness ... Read full story
 2/26/2004
Hereditary Disease Research at UC Davis  *
Research into the disease known as hereditary equine regional dermal asthenia (HERDA; also known as hyperelastosis cutis, HC) is also proceeding at the University of California, Davis. The research is headed by Stephen White, DVM, Dipl. ACVD (dermatology) and has a four-part focus. USED WITH PERMISSION OF DR. STEPHEN WHITE A typical ... Read full story
 2/26/2004
AAEP 2003: JEB in Belgian Draft Horses  *
Junctional epidermolysis bullosa (JEB) is an inherited disease that causes skin lesions over pressure points of the body in newborn Belgian foals and results in large areas of skin loss. The disease is a lethal condition and affected foals typically are euthanized shortly after birth. Courtesy Dr. John D. Baird JEB causes areas of skin loss ... Read full story
 2/17/2004
The Future of Horses with HYPP  *
Letter to the Editor: This letter must begin by saying how proud I am of a man whom I have never met. His name is Steve Stevens of Houston, TX, the current president of the American Quarter Horse Association (AQHA). Mr. Stevens has given the membership of AQHA a voice. He has written personal letters of his activities as president and the goals ... Read full story
 12/30/2003
Can Laminitis be Inherited?
Q: I just read your excellent article "The Latest on Laminitis" by Karen Briggs. Is laminitis an inheritable disease? What about founder? William A: The terms "founder" and "laminitis" have become somewhat confusing and are often used interchangeably. I suspect that the more accepted definition and distinction is that when the word "founder" ... Read full story
 10/1/2003
First Equine Clone is a Mule   *
The landscape of equine reproduction research dramatically changed May 29, when a University of Idaho (UI) and Utah State University team announced they were the first to clone a member of the equine family--the mule--according to an article to be published in the journal Science. The research team includes Gordon Woods, DVM, MS, PhD, Dipl. ACT, UI ... Read full story
 7/1/2003
A Horse of a Different Color  *
What is your favorite color of horse? Is it the pitch black of Walter Farley's Black Stallion? The whiteness of the Lone Ranger's Silver? The sunshine gold of Roy Rogers' Trigger? How does a breeder capitalize on the fancy colors that bring big bucks? Unfortunately, it's not always as simple as breeding a black stallion to a black mare to get a black ... Read full story
 5/1/2003
Heritability of Behavior   *
One of the most complex and least-studied subjects involving the horse is heritability of behavior. Do horses truly inherit behavioral traits, or do these traits simply come into being as the result of environmental factors and influences? There are a couple of reasons why there are few learned answers to this question. First, it is a complex issue ... Read full story
 5/1/2003
Cremello Gene Found  *
Researchers at the Laboratoire de Genetique Biochimique et de Cytogenetique in the Institut National de la Recherche Agronomique (INRA) at the Centre de Recherche de Jouy-en-Josas, France, recently identified the gene that produces the cremello coat color in the horse. The cremello color is a dilution of all basic coat colors, and produces a pale (cream) ... Read full story
 4/1/2003
Mare vs. Stallion Genes
Q: I hear people talking about how genetic lines all trace through the paternal side of the horse. What about the mares? What quality of foal would you get if you doubled on the maternal side, linebreeding (mating related individuals to concentrate on genetic material) on the mare's side (providing she has the quality)? Is there a difference? Barb ... Read full story
 4/1/2003
AQHA Members Vote to Retain White Rule  *
More than 1,000 American Quarter Horse Association (AQHA) members attended the 63rd annual convention, where the organization’s board voted to retain Rule 227(c), which limits the amount of white on horses eligible for registration in the organization. The vote on the white rule leaves Rule 227(c) unchanged and will continue to be read and upheld ... Read full story
 3/17/2003
Genetic Defects Statement Issued by AAEP  *
The American Veterinary Medical Association (AVMA) recently re-stated a policy that surgical correction of “genetic defects” for the purposes of concealing the defect is unethical. If surgical correction is undertaken for the purpose of improving the health of the individual, then it should be accompanied by sterilization to prevent the perpetuation ... Read full story
 3/11/2003
Genetic Compatibility   *
Michael Goodbody is the managing director of Gainsborough Stud Management near Newbury, England. He delivered the following speech to the Thoroughbred Breeders Association (TBA) at its annual awards dinner in London on Jan. 7. I would now like to touch on the important points that breeders should consider when planning to mate their mares with the ... Read full story
 1/28/2003
Genetically Speaking  *
Ireland is not a big country. It covers only 32,599 square miles, making it about the same size as Indiana. But Ireland plays a large and important role in the Thoroughbred industry. Some of the best runners in the world are raised on its limestone-enriched pastures. Two Irish-bred standouts-High Chaparral and Domedriver-won races at the 2002 Breeders' ... Read full story
 1/28/2003
Genome Meeting Convenes  *
In October 2002, a meeting of the Interagency Working Group for domestic animal genome sequencing was convened at the USDA Whitten Building in Washington DC to discuss prioritization of domestic animal species for DNA genome sequencing. That such a meeting might take place was unthinkable only five or six years ago and reflects the dramatic accomplishments ... Read full story
 11/26/2002
Meeting Addresses Prioritization of DNA Genome Sequencing in Animals  *
In October 2002, a meeting of the Interagency Working Group for domestic animal genome sequencing was convened at the USDA Whitten Building in Washington, D.C. to discuss prioritization of domestic animal species for DNA genome sequencing. That such a meeting might take place was unthinkable only five or six years ago and reflects the dramatic accomplishments ... Read full story
 11/22/2002
The Gray Gene  *
British scientists have identified the distinctive gene that gives about 3% of the Thoroughbred population the gray coat color, and they plan to continue studying the genetics in hopes of learning why grays are more prone to developing melanomas than other horses. "If we can actually understand the process, maybe in the future it could be possible ... Read full story
 10/23/2002
American Quarter Horse Association Board of Directors to Consider Eligibility of Cremellos and Amendment of "White Rule"  *
Cremellos or perlinos, which are horses that exhibit light or pink skin over the body, white or cream-colored hair, and blue eyes, might be eligible for registration in the American Quarter Horse Association (AQHA). Last week, the AQHA Stud Book and Registration Committee voted to recommend to the Board of Directors (and general membership) that Rule ... Read full story
 10/16/2002
USDA Funds Genome Project  *
The horse genome effort received a major boost in April 1998 when the United States Department of Agriculture (USDA) approved renewal of an initiative of the National Animal Genome Project which, for the first time, includes support for construction of the horse gene map ($45,000 per year for 5 years). This initiative, titled National Research Sponsored ... Read full story
 10/11/2002
Arabian Registry To Require DNA Testing  *
DNA testing using hair roots will replace blood typing as the Arabian Horse Registry of America's required tool for parentage verification. This will begin with registration of the 2002 foal crop. This announcement follows a similar one by The Jockey Club, which will require DNA testing in Thoroughbreds beginning with the 2001 foal crop. The American ... Read full story
 10/11/2002
Origins of the Horse  *
It was previously thought that modern horses were descended from a limited number of wild herds and were selectively bred, leading to the diversity in breeds that we have now. However, new DNA evidence suggests that horses have a more diverse genetic pool than once thought, according to a study published in the Proceedings of the National Academy of ... Read full story
 9/18/2002
Rare White Thoroughbred Born in Kentucky  *
Patchen Beauty, the rare white Thoroughbred mare who garnered a lot of attention when she competed on the Kentucky circuit in the mid-1990s, produced a white colt on April 5 at Warren Rosenthal's Patchen Wilkes Farm near Lexington, Ky. Farm manager Barry Ezrine said the colt, a son of Overbrook Farm stallion Pioneering, was "heatlhy and running around." ... Read full story
 4/10/2002
Solving Health Problems Through Genetics   *
The solution to health and soundness problems facing horses might be as close as the horse itself. Laminitis, colic, respiratory disease, and even joint problems could be prevented or treated using genetics. At the Blue Ribbon Horse Genome conference on March 2, researchers and horse industry representatives debated whether the main objective of genetic ... Read full story
 4/1/2002
Thoroughbred Pedigrees Show Little Genetic Diversity   *
More than 95% of Thoroughbreds share the same paternal lineage, and almost half of the genetic makeup of the breed can be attributed to just 10 foundation horses. These facts are just a few of the recent findings brought to light by a research team at Trinity College in Dublin, Ireland. The group, led by Professor Patrick Cunningham, MS, PhD, used ... Read full story
 3/1/2002
Links to the Future  *
"Go with your strengths, and collaborate as effectively as possible." Those were the two baseline rules that Bill Moyer, DVM, head of the Department of Large Animal Medicine & Surgery at Texas A&M's College of Veterinary Medicine, and Bryan Johnson, PhD, head of the Department of Animal Science in Texas A&M's College of Agriculture and ... Read full story
 2/1/2002
Expert Panel to Spotlight Equine Genome Research  *
The first public gathering to explore the benefits of equine genome research will convene in Dallas, Texas, on Sat., March 2 at the American Quarter Horse Association (AQHA) 2002 Annual Convention. "Genome Research 101 for the Horse Industry" will be held from 8:00 a.m. - 3:30 p.m. at the Hotel Inter-Continental Dallas and is sponsored through the ... Read full story
 1/28/2002
Breeding Planning: Selecting A Sire   *
When you drive by a farm and see a bright, playful young foal romping in a lush pasture with his dam, it's easy to forget how much work, money, and planning went into his breeding. Many people underestimate the planning that goes into a useful, profitable mating. The first step in the process is getting the opinion of a qualified veterinarian as ... Read full story
 1/1/2002
TV Series Focuses on Horse Genome Project  *
The horse genome project and the pros and cons of genetic tinkering within breeding will be the focus of a "Science Times" segment that will air Tuesday, Nov. 13 at 9:00 (EST). Science Times is a television series produced jointly by National Geographic and New York Times Television and is aired on the National Geographic television channel. "Can ... Read full story
 11/12/2001
Breeding Horses With Genetic Disorders
I read on your site that two or three Quarter Horse stallions might be traced to the syndrome of polysaccharide storage myopathy (PSSM). I have a performance Quarter Horse filly with PSSM, and I feel it is important to know who these sires are so I can be an informed and responsible breeder. The filly is great, but in picking out a stallion for her ... Read full story
 11/1/2001
Gene Mapping Workshop Shows Great Progress   *
In the past two years, researchers have more than doubled the known number of landmarks for the equine gene mapping project, bringing the total mapped markers and genes to nearly 1,000. Horse geneticists met July 4-6 at the Fourth International Equine Gene Mapping Workshop in Brisbane, Australia, to discuss their research. The group also reviewed preliminary ... Read full story
 11/1/2001
Test-Tube Foals Born In England  *
Europe's first successful intracytoplasmic sperm injection (ICSI) foals were recently born in Newmarket, England, as a part of a research program designed to create better sport horses. The foals were born March 21 and 28. Professor Twink Allen, BVSc, PhD, ScD, DESM, MRCVS, is the head of the research group that performed the studies at the Mertoun ... Read full story
 11/1/2001
HYPP: Hyperkalemic Periodic Paralysis  *
They gave the muscular Quarter Horse colt an ambitious name: Impressive. He lived up to the name in such dramatic fashion that it became a household word in Quarter Horse circles - especially among breeders and exhibitors involved in showing halter horses. Impressive sons and daughters were big, bold, and beautiful with defined musculature. They ... Read full story
 10/10/2001
Combined Immunodefiency in Arabians  *
A newborn Arabian foal is possibly one of the most beguiling creatures on Earth. Elegant of feature and blessed with beauty, he's full of promise for the future--and often descended of royal blood and worth many thousands of dollars. Imagine how crushing it is for a breeder to discover that a seemingly healthy foal has inexplicably died from what, ... Read full story
 10/9/2001
Tying-Up Syndrome
I just bought a Thoroughbred filly which was in race training, but retired without running because of recurrent bouts of ‘tying-up.’ She had been turned out for six months before I got her, and never showed any problems while on the farm. What can you tell me about this disease? Tying-up is a syndrome or description of a horse with muscle damage that ... Read full story
 9/13/2001
Horse Geneticists Meet In Brisbane, Australia  *
Horse geneticists met July 4-6, 2001, in Brisbane, Australia, for the Fourth International Equine Gene Mapping Workshop. Forty-two scientists from Europe, Asia, Australia and America met to present their research and discuss collaborative efforts in building the map at the meeting organized by Dr. Kevin Bell of the University of Queensland. This series ... Read full story
 7/13/2001
Barefoot Benefits  *
We often assume a horse needs shoes without really thinking about why or how that affects a horse's overall health. Yet standard veterinary texts, such as books by James Rooney, DVM, and O.R. Adams, DVM, on equine lameness, refer to shoeing as a "necessary evil." What makes shoeing necessary in some instances is the need for additional traction caused ... Read full story
 7/1/2001
Hyperkalemic Periodic Paralysis (HYPP) and Breeding
I have a 6-year-old Quarter Horse mare N/H (heterozygous) for hyperkalemic periodic paralysis (HYPP), and a lot of vets have told me that I can breed her to a Thoroughbred, and the baby should be fine. She does have some problems with the warm weather. I would love to get her bred, but I do not want to have her so stressed out that it would kill her. ... Read full story
 5/1/2001
Can You Breed for Speed or Stamina?  *
For centuries, horsemen have tried to breed for speed and endurance and found that the greatest genetic potential can yield disappointment as easily as reward. Consider the indomitable Secretariat, who sired a string of mostly unremarkable racers, or the supremely talented John Henry, who sprang from an unheralded sire and dam. These are not isolated ... Read full story
 3/1/2001
Overo Lethal White Syndrome  *
Overo Lethal White Syndrome (OLWS) is a condition that occurs in newborn foals. The condition is genetic, and both parents carry the defective gene. Horses which carry this gene are most commonly overo white patterned horses (frame overos), but there are exceptions. The defective gene has been found in American Paint Horses, American Miniature Horses, ... Read full story
 1/1/2001
Genetic Color Question  *
Q: I have a dun mare which I was considering breeding this year to a buckskin stallion. I was informed that there might be some problems with this particular cross due to the dun color factor. The foal might be lethal white or albino. A: Answering a question about crossing a dun mare with a buckskin stallion is a bit tricky because there are differences ... Read full story
 1/1/2001
Equine Genetics  *
On June 26, 2000, the President of the United States presided over a news conference at which a dramatic announcement was made: Scientists reported that the human genetic code essentially had been deciphered. At the White House ceremony, the scientists said that they virtually had completed assembly of what they called "the book of life." In essence, ... Read full story
 11/1/2000
Growing Up: Estimating Adult Size  *
You look at that little 14-hand cutting mare which you have decided to breed. She's a dandy, you think, but just a little small for general ranch work or pleasure riding. So, you take her to that 16-plus-hand Thoroughbred in the next county and breed her. Eleven months later, you walk out to the barn and there in the stall is a newborn foal which has ... Read full story
 1/1/2000
There Was a Crooked Foal  *
A newborn foal, teetering on spidery legs, has a knock-kneed, awkward charm that can melt the hardest of hearts. But it's not so charming if, after a couple of weeks, his legs still look as if they're bending in all the wrong places. Some crookedness of the limbs is to be expected in most newborns, but generally it resolves of its own accord within ... Read full story
 5/1/1999
DNA Kit Now Available For $30   *
AQHA's Executive Committee, at its January meeting, reduced the cost for a DNA kit from $40 to $30 per horse. The new price became effective Feb. 1, 1999. To date, AQHA offers its Members the lowest fees in the equine industry for DNA testing. In conjunction with the University of California at Davis, AQHA is making an effort to understand certain ... Read full story
 2/19/1999
Reading Pedigrees  *
The horse you see--or the foal you envision--reflects generations of ancestors. Owners of those ancestors made decisions on mating horses, planning each generation. They selected animals by examining the successes of previous horsemen, as recorded in pedigrees. Each breed includes individuals which meet a standard of a breed registry. The registry--an ... Read full story
 2/1/1999
Fetal Development and Foal Growth  *
Procreation in any species borders on the miraculous. How else can one describe a phenomenon where two microscopic entities intersect, join forces, and grow into a living, breathing creature that, in the case of the horse, will weigh 1,000 pounds or more at maturity. Science, of course, does not deal in miracles. It involves itself in no-nonsense facts ... Read full story
 1/1/1999
Genetic Testing: The Secret World Of Genes  *
Anyone who reads this magazine likely agrees that horses are amazing creatures. Valued for their speed, their beauty, and their grace, not to mention their generosity of spirit toward humans, horses are a continuing marvel even to those of us who work with them every day. And now, as researchers delve into the secrets of the DNA strands that make horses ... Read full story
 12/1/1998
First Sex-Selected Filly Born   *
Through the collaborative efforts of Colorado State University, USDA, MoFlo, and the U.S. Department of Agriculture and Cytomation the world's first sex-selected filly was born August 6, 1998. The filly, Call Me Madam, was made possible by new cell-sorting technology developed by XY Inc. XY Inc. originally intended to provide semen-sexing for the ... Read full story
 8/21/1998
Center For Reproductive Technology Founded  *
The possibility of human cloning and other advancements in assisted reproductive technologies have recently captured a niche on the news agenda and focused ethical issues for a national debate. But these same advancements have the capability to significantly boost Virginia's multi-million dollar agricultural animal industry. In an effort to better ... Read full story
 3/27/1998
Do Genetics Affect Racing Performance?  *
We know some Thoroughbreds are faster than others. But why? Some are back at the knee. Some are sounder than others. Some are more susceptible to infectious diseases than others. But why? These, and countless other questions, were discussed during a four-day conference March 8-11 held at the Banbury Center of Cold Spring Harbor Laboratory on Long ... Read full story
 3/27/1998
Advances In Semen Sexing  *
Rens, Welch, and Johnson of Beltsville, Md., reported significant improvements in their flow cytometric semen sexing procedure at the American Society of Animal Science's meeting. The sexing of sperm with the Beltsville method is based on the fact that the X-chromosome is larger than the Y-chromosome. Hence, the amount of DNA is greater in the X-chromosome. ... Read full story
 12/1/1997
Genetics Primer  *
Progress in the field of genetics has been moving by leaps and bounds during the past few years. It wasn't long ago that researchers discovered ways to unravel and study DNA, that elusive strand of genes that inhabits each and every cell. Once that breakthrough was made, discoveries came at an almost dizzying pace. Specific genes were identified and ... Read full story
 9/1/1997




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