Overo Lethal White Syndrome (OLWS)


How Your Horse Got His Color (And Why You Should Care)

April 28, 2015

A horse's coat color genetics are important not just for aesthetic reasons; they can also have health implications.... Read More


Genetic Disorders: Breed by Breed

February 11, 2015

By knowing what conditions certain horses are predisposed to, owners and breeders can take preventive steps.... Read More


Genetic Conditions by Body System

October 14, 2014

This report includes genetic diseases known to affect horses and which breeds are most susceptible.... Read More


Equine Coat Color Genetics 101

April 05, 2013

What's behind a horse's coat color? The answer lies in coat color genetics.... Read More


Valberg to be Inducted into Equine Research Hall of Fame

September 16, 2012

Valberg will be the first woman inducted into the Equine Research Hall of Fame.... Read More


Genetic Testing Options Expanded for APHA Horses in 2012

January 01, 2012

Testing options include a comprehensive coat color package and a comprehensive disease diagnostic package.... Read More


UC Davis to Partner with APHA for Genetic Testing

July 25, 2011

The APHA has introduced the University of California, Davis, as its official genetic testing provider. ... Read More


Heritable Equine Skin Disorders

May 11, 2011

Some skin conditions in horses are caused by fungus and bacteria, while others are caused by external factors ... Read More


What's In Your Horse's DNA?

December 01, 2010

Geneticists have created tools and tests that enhance horse breeders' ability to select for healthy foals.... Read More


Coat Color Studies Aid Health Research, Breeding Choices

September 21, 2009

Certain horse coat colors or patterns are associated with health or medical problems.... Read More


Equine Veterinary Group Releases Statement on Genetic Defects in Horses

August 04, 2009

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... Read More


Equine Genetic Disease: Who's At Risk?

October 01, 2005

Many DNA sequence variations are fine; they just give rise to the broad spectrum of colors, sizes, and other characteristics we see in the horse population. Some variations, however, cause problems. These might range from a genetic predisposition... Read More


Equine Pediatric Medicine (AAEP Convention 2001)

February 01, 2002

"While many outbreaks of respiratory disease in foals are infectious in nature, this is not always the case," she began. "Environmental factors can have a profound effect."... Read More


Overo Lethal White Syndrome Update

November 01, 2001

Researchers have determined the coat patterns associated with overo lethal white syndrome newborn foals... Read More


Overo Lethal White Syndrome

January 01, 2001

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... Read More