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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. A change at the agouti locus is capable of turning bay to black, while a mutation at the extension locus can turn bay or ...
G. Ledyard Stebbins. Ann Trommershausen Bowling (June 1, 1943 – December 8, 2000) was an American scientist who was one of the world's leading geneticists in the study of horses, conducting research in the areas of molecular genetics and cytogenetics. [1] She was a major figure in the development of testing to determine animal parentage ...
Lethal white syndrome ( LWS ), also called overo lethal white syndrome ( OLWS ), lethal white overo ( LWO ), and overo lethal white foal syndrome ( OLWFS ), is an autosomal genetic disorder most prevalent in the American Paint Horse. Affected foals are born after the full 11-month gestation and externally appear normal, though they have all ...
A “blue” dun, or grullo. A red dun. 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. A dun horse always has a dark dorsal stripe down the middle ...
Hereditary equine regional dermal asthenia. Hereditary equine regional dermal asthenia ( HERDA ), also known as hyperelastosis cutis ( HC ), is an inherited autosomal recessive connective tissue disorder. It develops from a homozygous recessive mutation that weakens collagen fibers that allow the skin of the animal to stay connected to the rest ...
Hyperkalemic periodic paralysis ( HYPP, HyperKPP) is a genetic disorder that occurs in horses. It is also known as Impressive syndrome, after an index case in a horse named Impressive. It is an inherited autosomal dominant disorder that affects sodium channels in muscle cells and the ability to regulate potassium levels in the blood.
Junctional epidermolysis bullosa ( JEB) is an inherited disorder that is also known as red foot disease or hairless foal syndrome. [1] JEB is the result of a genetic mutation that inhibits protein production that is essential for skin adhesion. [2] Therefore, tissues, such as skin and mouth epithelia, are affected. [3]
Dominant white. This Thoroughbred stallion ( W2/+) has one form of dominant white. His skin, hooves, and coat lack pigment cells, giving him a pink-skinned white coat. Dominant white (W) [1] [2] is a group of genetically related coat color alleles on the KIT gene of the horse, best known for producing an all-white coat, but also able to produce ...
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