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The color of these lighter areas depends on the underlying color and ranges from off-white to light tan. [2] This type of coloration is most often found in breeds such as the Fjord horse, Exmoor Pony, and Haflinger. Wild equids like the Przewalski's horse, onager, African wild ass, kiang as well as the domestic donkey exhibit pangaré as a rule ...
However, the pervasive coat color among wild equids is dun, and researchers from Darwin to modern day consider dun to be the wildtype state. [29] [30] An older non-dun mutation was found in 2015 and named non-dun 1. It creates primitive markings but does not dilute the base color, and is co-dominant with the more common non-dun 2 but recessive ...
Steel Grey/Iron Grey: A grey horse with intermingled black and white hairs. This color occurs in a horse born black, or in some cases, dark bay, and slowly lightens as the horse ages. Rose Grey: A grey horse with a reddish or pinkish tinge to its coat. This color occurs in a horse born bay or chestnut and slowly lightens as the horse ages.
Champagne is a dominant trait, based on a mutation in the SLC36A1 gene. [1] A horse with either one or two champagne genes will show the effects of the gene equally. However, if a horse is homozygous for a dominant gene, it will always pass the gene on to all of its offspring, while if the horse is heterozygous for the gene, the offspring will not always inherit the color.
The silver or silver dapple (Z) gene is a dilution gene that affects the black base coat color and is associated with Multiple Congenital Ocular Abnormalities. It will typically dilute a black mane and tail to a silvery gray or flaxen color, and a black body to a chocolaty brown, sometimes with dapples. [1]
Because the red color is recessive, two bay or black parents can produce a chestnut foal if both carry "e" or "e a". However, two chestnut parents cannot produce a bay or black foal. The extension locus (genetics) is found on chromosome 3 (ECA3) and is part of the gene that codes for the equine melanocortin 1 receptor (MC1R).
Likewise, because black's a at agouti is recessive, two black horses cannot have a bay foal either. However, it is possible for a chestnut horse and a black horse to produce a bay foal, if the chestnut horse is AA or Aa at agouti. The foal can inherit the A allele from its chestnut parent and the E allele from its black parent, resulting in a ...
Tobiano is a spotted color pattern commonly seen in pinto horses, produced by a dominant gene. The tobiano gene produces white-haired, pink-skinned patches on a base coat color. The coloration is almost always present from birth and does not change throughout the horse's lifetime, unless the horse also carries the gray gene.