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A recent survey of horse breeds in Europe and the USA found the Warmblood fragile foal syndrome type 1 (WFFS) variant mainly in warmbloods and few other breeds, with no evidence the variant originated in Arabians.

A collaborative study involving Veterinary Genetics Laboratory researchers and other researchers at UC Davis used 33 autosomal short tandem repeat (STR) markers to evaluate genetic heterogeneity and diversity in a large sample of purebred Golden Retrievers.