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Seal brown is a hair coat color of horses characterized by a near-black body color; with black points, the mane, tail and legs; but also reddish or tan areas around the eyes, muzzle, behind the elbow and in front of the stifle. The term is not to be confused with "brown", which is used by some breed registries to refer to either a seal brown horse or to a dark bay without the additional characteristics of seal brown genetics. Like bay, the seal brown color is produced by the Agouti ("A") gene acting upon a genetically black base coat, suppressing the black into point coloration and allowing the underlying reddish or brownish color to appear. However seal brown is designated with the qualifier At The genetic study of seal brown is relatively new. Several theories were advanced in the last century to explain the heredity of the seal brown coat, but today, true seal brown horses can be distinguished from bays by a DNA test.〔(【引用サイトリンク】title=Equine DNA Testing Services )〕 The genetically and visually related dark bay coat color, which also features black points and a near-black body, differs from true seal brown in the absence of tan markings. The term "seal brown" is to be distinguished from the term "brown." Another mimic is the liver chestnut, an all-over dark brown coat including mane and tail, that is sometimes confused with seal brown. However, true seal browns have black points, while liver chestnuts do not. ==Identification== The research behind the classification of seal brown as distinct from dark bay is quite new, and as a result, opinions vary on what constitutes a true seal brown. In ''Equine Color Genetics'', Dan Phillip Sponenberg wrote "In general, all dark colors with black points that are lighter than black but darker than bay are called brown."〔 In this text, he classifies black-pointed, clear reddish coats of any shade as bay, and black-pointed coats of any shade with black countershading as brown.〔Sponenberg 2003. pg 25. "As a general rule, better accuracy is achieved by distinguishing brown from bay by the presence of sooty countershading."〕 These definitions, while precise, are no longer accurate in light of current research. True seal brown is best described as a black or nearly-black coat with reddish or tan hairs on the "soft parts": the muzzle, eyes, inner ears, underbelly, behind the elbow, and in front of the stifle.〔 Like other coat colors, seal browns can range in shade. The very darkest are just about black except for their tan areas. Lighter examples are easily confused with dark bays. The mane, tail, and legs are most certainly always black.〔 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「Seal brown (horse)」の詳細全文を読む スポンサード リンク
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