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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 of its back, usually has a darker face ...
Some were non-dun with primitive markings, and non-dun 1 is one of the oldest coat color mutations, and has been found in remains from 42,700 years ago, along with dun. Non-dun 2, the version of the dun gene that most domestic horses have, is thought to be much more recent, possibly from after domestication. [ 3 ]
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.
Blue dun or grullo (also grulla, mouse dun) coloring is created by the dun gene acting on a black base coat, and is a coat color with a bluish cast and darker points. [13] Unlike blue roans, grullos are solid color and appear bluish due to low amounts of pigment in each hair, not interspersed white hairs. [ 14 ]
Dun most commonly refers to: Dun gene , which produces a brownish-gray color (dun) in horses and other Equidae Dun (fortification) , an ancient or medieval fort
Brown dun, a result of the dilution effect of the dun gene. Like all duns, brown duns have conspicuous primitive markings including at least a dorsal stripe and darker points. The primitive markings of brown duns are black, and the coat color is somewhere between the slate gray of a grulla and the tan of a bay dun.
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 ...
A red dun has a light reddish- tan body and dark red primitive markings and points Red duns have a chestnut base coat with the dun gene (one or two copies). Their body color is pale, dusty tan shade that resembles the light undercoat color of a body-clipped chestnut but with a bold, dark dorsal stripe in dark red, a red mane, tail and legs.