S A B I N O - 1
Sabino-1 is a white pattern found in various breeds. It is extremely rare in stock breeds, showing up in only one Paint (Nylon) and two Quarter Horse (Real Luck and Gold Mount) lines, and it entirely absent from Arabians, Clydesdales, Shires, Standardbreds, and Thoroughbreds. Sabino-1 was named such because scientists expected to name following patterns sabino-2, sabino-3, and so on. However, the KIT mutations of the same and similar types were instead given the name dominant white, which was later on changed to white spotting (covered in the white spotting section).
Sabino-1 is an SNP mutation on KIT and it is an incomplete dominant, expressing to different degrees depending on zygosity. Some traits that allude to, but are not exclusively indicative of, sabino-1 are bottom-heavy facial markings (especially on the bottom lip or under the chin), jagged and pointy leg markings, and feathery body markings with or without some roaning. In the Quarter Horse and Paint, sabino-1 tends to be less roany/feathery and more crisp.
Many people, breeders included, tend to call any horse that has chrome sabino, even if the horse does not have the sabino-1 gene (and in breeds that don't have sabino-1 at all). This is a major headache because it is scientific misinformation. If a horse is being offered for sale or stud and is listed as being sabino, when the mutation isn't actually in that horse, it is not only ignorant but just plain dishonest and false advertisement. White markings or chrome are not sabino. Only call a horse sabino if it has tested positive for the sabino-1 KIT mutation.
Sabino-1 is an SNP mutation on KIT and it is an incomplete dominant, expressing to different degrees depending on zygosity. Some traits that allude to, but are not exclusively indicative of, sabino-1 are bottom-heavy facial markings (especially on the bottom lip or under the chin), jagged and pointy leg markings, and feathery body markings with or without some roaning. In the Quarter Horse and Paint, sabino-1 tends to be less roany/feathery and more crisp.
Many people, breeders included, tend to call any horse that has chrome sabino, even if the horse does not have the sabino-1 gene (and in breeds that don't have sabino-1 at all). This is a major headache because it is scientific misinformation. If a horse is being offered for sale or stud and is listed as being sabino, when the mutation isn't actually in that horse, it is not only ignorant but just plain dishonest and false advertisement. White markings or chrome are not sabino. Only call a horse sabino if it has tested positive for the sabino-1 KIT mutation.
E_ A_ nSb1 or E_ aa nSb1 or ee nSb1
E_ A_ Sb1Sb1 or E_ aa Sb1Sb1 or ee Sb1Sb1
E_ A_ Sb1Sb1 or E_ aa Sb1Sb1 or ee Sb1Sb1