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Roan is a coat color found in many animals, including horses, cattle, antelope, cats and dogs.It is defined generally as an even mixture of white and pigmented hairs that do not "gray out" or fade as the animal ages. [1]
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).
A 1979 study of American-bred Belgian draft horses found fewer roan offspring from roan-to-roan matings than expected for a simple dominant trait. Finding neither stillborn nor sickly, short-lived foals from these roan parents, the researchers concluded that in the homozygous condition the roan gene was lethal to the embryo or fetus. [27]
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 ...
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 ...
A horse's genes influence whether it will have white markings, though the exact genes involved could differ between breeds. [2] Chestnut horses generally have more extensive white markings than bay or black horses. [2] [3] Horses with the W20 allele typically have white face and leg markings. [4]
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 ...