Tying-Up in Thoroughbreds: Narrowing the Genetic Search

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Researchers suspect tying-up in horses is a heritable condition; however, they have yet to determine the gene--or genes--responsible. But a team of Japanese researchers recently moved the investigation forward with a groundbreaking study of affected Thoroughbred racehorses' DNA. Muscle disorders such as polysaccharide storage myopathy (PSSM, recognized mainly in Quarter Horses) and recurrent

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