Dominant white is a group of genetically related coat color alleles on the KIT gene of the horse, best known for producing an all-white coat, but also able to produce various forms of white spotting,
This Thoroughbred stallion (W2/+) has one form of dominant white. His skin, hooves, and coat lack pigment cells, giving him a pink-skinned white coat.
This dominant white Franches-Montagnes colt (W1/+) lost almost all his residual pigment by the time he was 3 years old (below)
The same foal as an adult horse. Some white spotted horses lose pigment with age, even though they do not possess the gray gene. The underlying skin remains dark.
The Camarillo White Horse breed has a dominant white coat attributed to the W4 mutation.
Sabino describes a distinct pattern of white spotting in horses. In general, Sabino patterning is visually recognized by roaning or irregular edges of white markings, belly spots, white extending past
Dominant white
…of white spotting, as well as bold white markings. Prior to the discovery of the W allelic series, many of these patterns were described by the term sabino, which is still used by some breed registries. White-colored horses are born with unpigmented pink skin and white hair, usually with dark eyes. Under…
A horse with classic sabino belly spots, white above its knees and hocks, a white chin and wide white facial markings.
A sabino horse with extensive roaning
A Thoroughbred horse that carries the W5 allele and has sabino patterning
Sabino patterns have long existed in Arabians