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A “blue” dun, or grullo. A red dun. The dun gene is a dilution gene that affects both red and black pigments in the coat color of a horse. The dun gene lightens most of the body while leaving the mane, tail, legs, and primitive markings the shade of the undiluted base coat color. A dun horse always has a dark dorsal stripe down the middle ...
This horse's dorsal stripe is most likely caused by non-dun 1. Less distinct primitive markings can also occur on non-dun horses, even in breeds which are not known to have any dun individuals. The most common primitive marking found is a dorsal stripe. [1] Most non-dun horses do not have darker primitive markings, but some do.
The dun gene also produces light guard hairs in the mane and the tail. Grullo[1] (pronounced GREW-yo) [2][a] or grulla is a color of horses in the dun family, characterized by tan-gray or mouse-colored hairs on the body, often with shoulder and dorsal stripes and black barring on the lower legs. The genotype for grulla horses is a black base ...
Dun horses may have primitive markings, which include any of the following: a dorsal stripe, lightened outer guard hairs on the manes and/or tails, zebra-like stripes on the upper legs, transverse striping over the upper shoulders, dark color around the muzzle, and ears with dark outlines and lighter interiors. [3]
Riwoche horses are pony sized, standing only 12 hands (48 inches, 122 cm) tall. They are said to resemble horses depicted in prehistoric cave paintings. [2] They are dun in color, with angular bodies, upright manes and primitive markings including a dorsal stripe down their spine and striping on the back of their legs.
Dun: A horse coat color that features primitive markings: a slightly darker hair shade from the base coat located in a dorsal stripe along the horse's backbone, horizontal striping on the upper legs and sometimes transverse striping across the shoulders. These markings identify a horse as a dun as opposed to a buckskin or a bay.
Equine coat color genetics determine a horse 's coat color. Many colors are possible, but all variations are produced by changes in only a few genes. Bay is the most common color of horse, [2] followed by black and chestnut. A change at the agouti locus is capable of turning bay to black, while a mutation at the extension locus can turn bay or ...
A dilution gene that produces what looks like point coloration, but from a completely different genetic mechanism is the dominant Dun gene, which dilutes the color of the body coat but not the points, including primitive markings—a dorsal stripe down the back and, less often, horizontal striping on the upper legs. On a bay base coat the dun ...