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The Appaloosa is an American horse breed best known for its colorful spotted coat pattern. There is a wide range of body types within the breed, stemming from the influence of multiple breeds of horses throughout its history. Each horse's color pattern is genetically the result of various spotting patterns overlaid on top of one of several recognized base coat colors. The color pattern of the Appaloosa is of interest to those who study equine coat color genetics, as it and several other physical characteristics are linked to the leopard complex mutation (LP). Appaloosas are prone to develop equine recurrent uveitis and congenital stationary night blindness; the latter has been linked to the leopard complex. Artwork depicting prehistoric horses with leopard spotting exists in prehistoric cave paintings in Europe. Images of domesticated horses with leopard spotting patterns appeared in artwork from Ancient Greece and Han dynasty China through the early modern period; the Nez Perce people of what today is the United States Pacific Northwest developed the original American breed. Appaloosas were once referred to by settlers as the "Palouse horse", possibly after the Palouse River, which ran through the heart of Nez Perce country. Gradually, the name evolved into "Appaloosa". The Nez Perce lost most of their horses after the Nez Perce War in 1877, and the breed fell into decline for several decades. A small number of dedicated breeders preserved the Appaloosa as a distinct breed until the Appaloosa Horse Club (ApHC) was formed as the breed registry in 1938. The modern breed maintains bloodlines tracing to the foundation bloodstock of the registry; its partially open stud book allows the addition of some Thoroughbred, American Quarter Horse and Arabian blood. Today, the Appaloosa is one of the most popular breeds in the United States; it was named the official state horse of Idaho in 1975. It is best known as a stock horse used in a number of western riding disciplines, but is also a versatile breed with representatives seen in many other types of equestrian activity. Appaloosas have been used in many movies; an Appaloosa is the mascot for the Florida State Seminoles. Appaloosa bloodlines have influenced other horse breeds, including the Pony of the Americas, the Nez Perce Horse, and several gaited horse breeds. == Breed characteristics == The Appaloosa is best known for its distinctive, preferred leopard complex spotted coat. Spotting occurs in several overlay patterns on one of several recognized base coat colors. There are three other distinctive, "core" characteristics: mottled skin, striped hooves, and eyes with a white sclera. Skin mottling is usually seen around the muzzle, eyes, anus, and genitalia.〔 Striped hooves are a common trait, quite noticeable on Appaloosas, but not unique to the breed.〔 The sclera is the part of the eye surrounding the iris; although all horses show white around the eye if the eye is rolled back, to have a readily visible white sclera with the eye in a normal position is a distinctive characteristic seen more often in Appaloosas than in other breeds.〔 Because the occasional individual is born with little or no visible spotting pattern, the ApHC allows "regular" registration of horses with mottled skin plus at least one of the other core characteristics. Horses with two ApHC parents but no "identifiable Appaloosa characteristics" are registered as "non-characteristic," a limited special registration status.〔 There is a wide range of body types in the Appaloosa, in part because the leopard complex characteristics are its primary identifying factors, and also because several different horse breeds influenced its development. The weight range varies from , and heights from . However, the ApHC does not allow pony or draft breeding.〔 The original "old time" or "old type" Appaloosa was a tall, narrow-bodied, rangy horse. The body style reflected a mix that started with the traditional Spanish horses already common on the plains of America before 1700. Then, 18th-century European bloodlines were added, particularly those of the "pied" horses popular in that period and shipped ''en masse'' to the Americas once the color had become unfashionable in Europe. These horses were similar to a tall, slim Thoroughbred-Andalusian type of horse popular in Bourbon-era Spain. The original Appaloosa tended to have a convex facial profile that resembled that of the warmblood-Jennet crosses first developed in the 16th century during the reign of Charles V. The old-type Appaloosa was later modified by the addition of draft horse blood after the 1877 defeat of the Nez Perce, when U.S. Government policy forced the Indians to become farmers and provided them with draft horse mares to breed to existing stallions. The original Appaloosas frequently had a sparse mane and tail, but that was not a primary characteristic as many early Appaloosas did have full manes and tails. There is a possible genetic link between the leopard complex and sparse mane and tail growth, although the precise relationship is unknown. After the formation of the Appaloosa Horse Club in 1938, a more modern type developed after the addition of American Quarter Horse and Arabian bloodlines. The addition of Quarter Horse lines produced Appaloosas that performed better in sprint racing and in halter competition. Many cutting and reining horses resulted from old-type Appaloosas crossed on Arabian bloodlines, particularly via the Appaloosa foundation stallion Red Eagle. An infusion of Thoroughbred blood was added during the 1970s to produce horses more suited for racing. Many current breeders also attempt to breed away from the sparse, "rat tail" trait, and therefore modern Appaloosas have fuller manes and tails. 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「appaloosa」の詳細全文を読む スポンサード リンク
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