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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.
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. This is because there are two types of non-dun, called non-dun1 and non-dun2.
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.
These include the “blue dun” or grullo, which has a black base coat, and the red dun, which has a chestnut base coat. Similarly, darker coloration at the points is also preserved in horses with the roan gene , a patterning gene, producing a body coat of mingled white and dark hairs, but leaving the points the darker base color in all horses ...
Zebra stripes are visible on the left back leg. 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 ...
Dún Briste (English: Dun Briste Sea Stack) is a natural sea stack or pilaster - in geomorphology called stack - that was formed in Ireland during the Carboniferous period, possibly Mississippian, approximately 350 million years ago.
"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 .
Perlinos are bay horses who are homozygous for the dominant creme (CCr) allele. Both black and red pigment are diluted to some shade of creme, though the formerly black points often have a stronger reddish cast. The skin is a slightly pigmented pink and the eyes are blue. Bay duns are bay horses with at least one dominant dun allele. Red and ...