Dominant white W5, W10, W13, W20, W22*

LABOKLIN Service ID: 8422

In 2000, a Quarter Horse named GQ Santana was born with a KIT gene white mutation (called W10) and became a prominent stallion in both AQHA and APHA. Horses with the W10 mutation have pink skin where the hair is white and the eyes have normal pigmentation and are rarely blue. VGL offers a test for the W10 mutation to owners who want to breed horses for this white pattern or to determine the genetic status of horses that descend from GQ Santana, but have minimal white spotting. W10 is inherited as a dominant trait; horses that carry W10 will display some degree of white patterning. Homozygous W10/W10 horses may not be viable. This result may only be found in aborted fetuses produced in matings between two W10 carriers.

Method	partnerlaboratory
Breed list	Quarter Horse
Duration	4 - 6 weeks after arrival of the sample in the lab