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Bay roan (sometimes called "red roan") A "blue roan", roaning over a black base coat Red roan, roaning over chestnut, sometimes called "strawberry roan" Roan is a horse coat color pattern characterized by an even mixture of colored and white hairs on the body, while the head and "points"—lower legs, mane, and tail—are mostly solid-colored.
Horses with the classic or true roan pattern may be any base color which is intermingled with unpigmented white hairs on the body. Except for white markings under the control of other genes, the head, mane, tail, and lower legs are dark. [2] Roan is a simple dominant trait symbolized by the Rn allele. [3]
An extensively expressed rabicano Arabian horse Classic rabicano markings on flanks and a skunk tail. Rabicano, sometimes called white ticking, is a horse coat color characterized by limited roaning in a specific pattern: its most minimal form is expressed by white hairs at the top of a horse's tail, [1] often is expressed by additional interspersed white hairs seen first at the flank, then ...
Red Roan: A chestnut base coat with a roaning pattern with the mane and tail being the same red as the body. Red roan is sometimes called Strawberry Roan, and the term Red Roan is occasionally used to describe a Bay Roan. [7] Bay Roan: A Bay base coat with a roaning pattern (the mane and tail of the Bay Roan will be Black).
Before domestication, horses are thought to have had these coat colors. [1] Equine coat color genetics determine a horse's coat color. Many colors are possible, but all variations are produced by changes in only a few genes. Bay is the most common color of horse, [2] followed by black and chestnut.
The genetics behind some types of sabino, such as that found in Clydesdales, have not yet been identified. Some genes, such as Sabino-1, are incomplete dominants, producing irregular spotting when heterozygous, but when homozygous, can produce a horse that is almost completely white. Some forms of sabino are thought to be a reason for solid ...
None of the control horses of these breeds who lacked the mutated form of PMEL17 had any eye disorder. [6] Eye disorders in horses with the silver dapple gene. Similar mutations in other species provide insight into the roles played by the PMEL17 gene. Relatively few such mutations are known, which suggests that the gene is involved in ...
Varnish roan is thought to occur due a single, simple dominant gene on equine chromosome 1 (ECA1). [1] It also appears that specific white patterning genes produce the assorted blanket, leopard, and snowflake coat patterns. [2] Without these white patterning factors, horses with one or two copies of the dominant Lp gene are "varnish roans ...