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DNA testing for health, appearance and pedigree verification in horses

Learn about one of the tests we do: W22 dominant white

W22 is a version of the KIT gene that produces a partial to completely white coat pattern. W22 is thought to have originated in an USA-bred Thoroughbred mare called Not Quite White, born in 1989.

Not Quite White had at least two white foals. The most well-known is Airdrie Apache (a stallion). She also produced a filly called Spotted Lady. Most W22 horses are descended from Airdrie Apache.

No horses have been identified yet carrying two copies of W22.

Gene or region and technical reference

Gene: KIT (causative). Reference: Dürig et al. (2017)

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