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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.
A Heck horse. In terms of equine coat color genetics, all of these shades are based on the dun gene acting as a dilution gene over the black gene. Because the grulla color is not due to the gray gene, a grulla horse remains the same basic color from birth, though some minor shade variation may occur from summer to winter coats. If a grulla also ...
The Przewalski's horse is dun-colored with primitive markings. So, too, are horse breeds such as the Konik and the Heck horse, "bred back" to resemble the now-extinct tarpan, many of which are grullo or mouse dun in color. Every dun horse has a dorsal stripe, and some dun horses also have additional primitive markings.
Grulla, or Blue Dun: A horse with a black base color and the dun gene. Coat is a solid "mouse-colored" gray or silver (can also be almost brownish-gray) with black or dark gray primitive markings. Red Dun: A chestnut base coat with dun factors. Coat is usually pale yellow or tan with chestnut (red) primitive markings.
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 ]
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.
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 ...
"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. Grulla covers horses with blueish, mousy or slate-colored bodies ...