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Dun, also called bay dun, classic dun, or zebra dun is the most common type of dun, and has a tan or gold body with black mane, tail, and primitive markings. Genetically, the horse has an underlying bay coat color, acted upon by the dun gene.
Some bay horses have a faint dorsal stripe, which may be caused by the non-dun 1 allele. The oldest known horse coat color is bay dun, a tan color with a black mane, tail, dorsal stripe, and lower legs. The legs may sometimes have zebra-like black stripes; these, along with the dorsal stripe seen on all dun horses, are called primitive markings ...
"Dun" as used by the Kiger registry covers dun horses with black points, and adds the terms zebra dun, dusty dun, smutty dun or coyote dun, depending on the exact shade of body color. Red dun, or the variation "apricot dun", covers horses with points that are red, brown or flaxen .
Most non-dun horses do not have darker primitive markings, but some do. This is because there are two types of non-dun, called non-dun1 and non-dun2. Non-dun 1 removes the diluting effect of dun, but keeps the primitive markings, while non-dun 2 removes both the diluting effect and the primitive markings. [13]
Some horses with a particular type of dun hair coat known as a "blue dun", grullo, or "mouse" dun appear to be a solid gray. However, this color is caused by the dun gene acting on a black base coat, and horses who are dun have all hairs the same color; there is no intermingling of white and dark hairs. Also, dun horses do not get lighter as ...
Horses with the dominant D allele (D/D or D/d genotype) exhibit hypomelanism of the body coat, while d/d horses have otherwise intense, saturated coat colors. The mane, tail, head, legs, and primitive markings are not diluted. Zygosity for Dun can be determined with a DNA test. [27] The Dun locus is TBX3 on equine chromosome 8.
The colouration is genetically a bay-based dun further diluted by a single allele of the cream gene, what is sometimes called a "buckskin dun" in other settings. [6] The yellow dun (gulblakk) is the rarest colour aside from kvit (see below). [5] It is a red dun with an additional dilution factor that makes the body a light cream colour.
Brindle: One of the rarest colors in horses, characteristics are any base coat color with "zebralike" stripes, but the most common is a brown horse with faint yellowish markings. Usually linked to chimerism , [ 10 ] but one heritable brindle pattern that affects coat texture and color in a family of American Quarter Horses has been named ...