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Bay (horse) : ウィキペディア英語版
Bay (horse)

Bay is a hair coat color of horses, characterized by a reddish-brown body color with a black mane, tail, ear edges, and lower legs. Bay is one of the most common coat colors in many horse breeds.
The black areas of a bay horse's hair coat are called "black points", and without them, a horse cannot be a bay. Black points may sometimes be covered by white markings; however such markings do not alter a horse's classification as "bay". Bay horses have dark skin, except under white markings - where the skin is pink. Genetically, bay occurs when a horse carries both the Agouti gene and a black base coat. The addition of other genes creates many additional coat colors. While the basic concepts behind bay coloring are fairly simple, the genes themselves and the mechanisms that cause shade variations within the bay family are quite complex and, at times, disputed. The genetics of dark shades of bay are still under study. A DNA test for seal brown has been developed, but sooty genetics also appear to darken some horse' bay coats, and that genetic mechanism is yet to be fully understood.
==Color variations and terminology==

Bay horses range in color from a light copper red, to a rich red ''blood bay'' (the best-known variety of bay horse) to a very dark red or brown called ''dark bay,'' ''mahogany bay,'' ''black-bay,'' or ''brown'' (occasionally "seal brown"). The dark, brown shades of bay are referred to in other languages by words meaning "black-and-tan." Dark bays/browns may be so dark as to have nearly black coats, with brownish-red hairs visible only under the eyes, around the muzzle, behind the elbow, and in front of the stifle. Dark bay should not be confused with "Liver" chestnut, which is also a very dark brown color, but a liver chestnut has a brown mane, tail and legs, and no black points.
The pigment in a bay horse's coat, regardless of shade, is rich and fully saturated. This makes bays particularly lustrous in the sun if properly cared for. Some bay horses exhibit ''dappling,'' which is caused by textured, concentric rings within the coat. Dapples on a bay horse suggest good condition and care, though many well-cared for horses never dapple. The tendency to dapple may also be, to some extent, genetic.
Bays often have a two-toned hair shaft, which, if shaved too closely (such as when body-clipping for a horse show), may cause the horse to appear several shades lighter, a somewhat dull orange-gold, almost like a dun. However, as the hair grows out, it will darken again to the proper shade. This phenomenon is part of bay color genetics, but usually not seen in darker shades of bay because there is less red in the hair shaft.
(''See:'' "Inheritance and expression," below'')
There are many terms that are used to describe particular shades and qualities of a bay coat. Some shade variations can be related to nutrition and grooming, but most appear to be caused by inherited factors not yet fully understood.
The palest shades, which lack specific English terminology found in other languages, are called ''wild bays.'' Wild bays are true bays with fully pigmented reddish coat color and black manes and tails, but the black points only extend up to the pastern or fetlock. Wild bay is often found in conjunction with a trait called "pangare" that produces pale color on the underbelly and soft areas, such as near the stifle and around the muzzle.

Bay horses have black skin and dark eyes, except for the skin under markings, which is pink. Skin color can help an observer distinguish between a bay horse with white markings and a horse which resembles bay but is not.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Bay (horse)」の詳細全文を読む



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