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Appaloosa

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.

Breed characteristics
The Appaloosa is best known for its distinctive, leopard complex-spotted coat, which is preferred in the breed. 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. 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 Native Americans 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 of horse was 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. == Color and spotting patterns ==
Color and spotting patterns
The coat color of an Appaloosa is a combination of a base color with an overlaid spotting pattern. The base colors recognized by the Appaloosa Horse Club include bay, black, chestnut, palomino, buckskin, cremello or perlino, roan, gray, dun and grulla. Appaloosa markings have several pattern variations. Spots overlay darker skin, and are often surrounded by a "halo", where the skin next to the spot is also dark but the overlying hair coat is white. It is not always easy to predict a grown Appaloosa's color at birth. Foals of any breed tend to be born with coats that darken when they shed their baby hair. In addition, Appaloosa foals do not always show classic leopard complex characteristics. Similarly, "dapple" gray horses are also different from Appaloosa horses, in terms of both coat color genes and patterning. Base colors are overlain by various spotting patterns, which are variable and often do not fit neatly into a specific category. LP is an autosomal incomplete dominant mutation in the TRPM1 gene located at horse chromosome 1 (ECA 1). All horses with at least one copy of LP show leopard characteristics, and it is hypothesized that LP acts together with other patterning genes (PATN) that have not yet been identified to produce the different coat patterns. Horses that are heterozygous for LP tend to be darker than homozygous horses, but this is not consistent. Three single-nucleotide polymorphisms (SNPs) in the TRPM1 gene have been identified as closely associated with the LP mutation, although the mechanism by which the pattern is produced remains unclear. Not every Appaloosa exhibits visible coat spotting, but even apparently solid-colored horses that carry at least one dominant LP allele will exhibit characteristics such as vertically striped hooves, white sclera of the eye, and mottled skin around the eyes, lips, and genitalia. Appaloosas may also exhibit sabino or pinto type markings; as pinto genes may cover or obscure Appaloosa patterns, pinto breeding is discouraged by the ApHC, which will deny registration to horses with excessive white markings. The genes that create these different patterns can be present in the same horse. The Appaloosa Project, a genetic study group, researches the interactions of Appaloosa and pinto genes, and how they affect each other. == History ==
History
of France on a spotted horse|alt=Painting of a man holding a sword while riding a rearing horse Recent research has suggested that Eurasian prehistoric cave paintings depicting leopard-spotted horses may have accurately reflected a phenotype of ancient wild horse. Domesticated horses with leopard complex spotting patterns have been depicted in art dating as far back as Ancient Greece, Ancient Persia, and the Han Dynasty in China; later depictions appeared in 11th-century France and 12th-century England. French paintings from the 16th and 17th centuries show horses with spotted coats being used as riding horses, and other records indicate they were also used as coach horses at the court of Louis XIV of France. In mid-18th-century Europe, there was a great demand for horses with the leopard complex spotting pattern among the nobility and royalty. These horses were used in the schools of horsemanship, for parade use, and other forms of display. Modern horse breeds in Europe today that have leopard complex spotting include the Knabstrupper and the Pinzgau, or Noriker horse. They took advantage of the fact that they lived in excellent horse-breeding country, relatively safe from the raids of other tribes, and developed strict breeding selection practices for their animals, establishing breeding herds by 1750. They were one of the few tribes that actively used the practice of gelding inferior male horses and trading away poorer stock to remove unsuitable animals from the gene pool, Early Nez Perce horses were considered to be of high quality. Meriwether Lewis of the Lewis and Clark Expedition wrote in his February 15, 1806, journal entry: "Their horses appear to be of an excellent race; they are lofty, eligantly formed, active and durable: in short many of them look like fine English coarsers and would make a figure in any country." Lewis did note spotting patterns, saying, "... some of these horses are pided [pied] with large spots of white irregularly scattered and intermixed with the black brown bey or some other dark colour". By "pied", Lewis may have been referring to leopard-spotted patterns seen in the modern Appaloosa, though Lewis also noted that "much the larger portion are of a uniform colour". The Appaloosa Horse Club estimates that only about ten percent of the horses owned by the Nez Perce at the time were spotted. and by June 14, 1877, had gathered about 600 people at a site near present-day Grangeville, Idaho. But on that day a small group of warriors staged an attack on nearby white settlers, which led to the Nez Perce War. After several small battles in Idaho, more than 800 Nez Perce, mostly non-warriors, took 2000 head of various livestock including horses and fled into Montana, then traveled southeast, dipping into Yellowstone National Park. A small number of Nez Perce fighters, probably fewer than 200, Other early variations of the name included "Appalucy", "Apalousey" and "Appaloosie". In one 1948 book, the breed was called the "Opelousa horse", described as a "hardy tough breed of Indian and Spanish horse" used by backwoodsmen of the late 18th century to transport goods to New Orleans for sale. By the 1950s, "Appaloosa" was regarded as the correct spelling. Revitalization featuring the Appaloosa horse. The Appaloosa came to the attention of the general public in January 1937 in Western Horseman magazine when Francis D. Haines, a history professor from Lewiston, Idaho, published an article describing the breed's history and urging its preservation. Haines had performed extensive research, traveling with a friend and Appaloosa aficionado named George Hatley, visiting numerous Nez Perce villages, collecting history, and taking photographs. The article generated strong interest in the horse breed, and led to the founding of the Appaloosa Horse Club (ApHC) by Claude Thompson and a small group of other dedicated breeders in 1938. The registry was originally housed in Moro, Oregon; but in 1947 the organization moved to Moscow, Idaho, under the leadership of George Hatley. The Western Horseman magazine, and particularly its longtime publisher, Dick Spencer, continued to support and promote the breed through many subsequent articles. A significant crossbreeding influence used to revitalize the Appaloosa was the Arabian horse, as evidenced by early registration lists that show Arabian-Appaloosa crossbreeds as ten of the first fifteen horses registered with the ApHC. For example, one of Claude Thompson's major herd sires was Ferras, an Arabian stallion bred by W.K. Kellogg from horses imported from the Crabbet Arabian Stud of England. Ferras sired Red Eagle, a prominent Appaloosa stallion By 1978 the ApHC was the third largest horse registry for light horse breeds. The state of Idaho adopted the Appaloosa as its official state horse on March 25, 1975, when Idaho Governor Cecil Andrus signed the enabling legislation. Idaho also offers a custom license plate featuring an Appaloosa, the first state to offer a plate featuring a state horse. == Registration ==
Registration
Located in Moscow, Idaho, the ApHC is the principal body for the promotion and preservation of the Appaloosa breed and is an international organization. The Appaloosa Horse Club has 33,000 members as of 2010, The American Appaloosa Association was founded in 1983 by members opposed to the registration of plain-colored horses, as a result of the color rule controversy. Based in Missouri, it has a membership of more than 2,000 as of 2008. Other "Appaloosa" registries have been founded for horses with leopard complex genetics that are not affiliated with the ApHC. One such registry, The Colorado Ranger Horse, also known as CRHA was founded by Mike Ruby in 1937, which relies on verified pedigree and not on color alone. These registries tend to have different foundation bloodstock and histories than the North American Appaloosa. The ApHC is by far the largest Appaloosa horse registry, and it hosts one of the world's largest breed shows. The Appaloosa is "a breed defined by ApHC bloodline requirements and preferred characteristics, including coat pattern". Appaloosas born with visible coat pattern, or mottled skin and at least one other characteristic, are registered with "regular" papers and have full show and breeding privileges. A horse that meets bloodline requirements but is born without the recognized color pattern and characteristics can still be registered with the ApHC as a "non-characteristic" Appaloosa. These solid-colored, "non-characteristic" Appaloosas may not be shown at ApHC events unless the owner verifies the parentage through DNA testing and pays a supplementary fee to enter the horse into the ApHC's Performance Permit Program (PPP). Color rule controversy (left) has different markings than a Leopard Appaloosa (right).|alt=Two horses in a grassy field with trees and a road in the background. Both horses are colored brown and white, but the horse on the left has the colors in patches, while the horse on the right is spotted. During the 1940s and 1950s, when both the Appaloosa Horse Club (ApHC) and the American Quarter Horse Association (AQHA) were in their formative years, minimally marked or roan Appaloosas were sometimes used in Quarter Horse breeding programs. At the same time, it was noted that two solid-colored registered Quarter Horse parents would sometimes produce what Quarter Horse aficionados call a "cropout", a foal with white coloration similar to that of an Appaloosa or Pinto. For a considerable time, until DNA testing could verify parentage, the AQHA refused to register such horses. The ApHC did accept cropout horses that exhibited proper Appaloosa traits, while cropout pintos became the core of the American Paint Horse Association. Famous Appaloosas who were cropouts included Colida, Joker B, Bright Eyes Brother and Wapiti. In the late 1970s, the color controversy went in the opposite direction within the Appaloosa registry. The ApHC's decision in 1982 to allow solid-colored or "non-characteristic" Appaloosas to be registered resulted in substantial debate within the Appaloosa breeding community. Until then, a foal of Appaloosa parents that had insufficient color was often denied registration, although non-characteristic Appaloosas were allowed into the registry. But breeder experience had shown that some solid Appaloosas could throw a spotted foal in a subsequent generation, at least when bred to a spotted Appaloosa. In addition, many horses with a solid coat exhibited secondary characteristics such as skin mottling, the white sclera, and striped hooves. The controversy stirred by the ApHC's decision was intense. In 1983 a number of Appaloosa breeders opposed to the registration of solid-colored horses formed the American Appaloosa Association, a breakaway organization. == Uses ==
Uses
's football team, the Seminoles, named for the Seminole Tribe of Florida.|alt=A brown and white spotted horse ridden by a sports mascot in modern-day Native American attire waving a flag stands on a sports field. More people are visible on the field, and a large crowd fills the stadium seating in the background. Appaloosas are used extensively for both Western and English riding. Western competitions include cutting, reining, roping and O-Mok-See sports such as barrel racing (known as the Camas Prairie Stump Race in Appaloosa-only competition) and pole bending (called the Nez Percé Stake Race at breed shows). English disciplines they are used in include eventing, show jumping, and fox hunting. They are common in endurance riding competitions, as well as in casual trail riding. Appaloosas are also bred for horse racing, with an active breed racing association promoting the sport. They are generally used for middle-distance racing at distances between and ; an Appaloosa holds the all-breed record for the distance, set in 1989. Appaloosas are often used in Western movies and television series. Examples include "Cojo Rojo" in the Marlon Brando film The Appaloosa, "Zip Cochise" ridden by John Wayne in the 1966 film El Dorado and "Cowboy", the mount of Matt Damon in True Grit. An Appaloosa horse is part of the controversial mascot team for the Florida State Seminoles, Chief Osceola and Renegade; even though the Seminole Tribe of Florida were not directly associated with Appaloosa horses. Influence There are several American horse breeds with leopard coloring and Appaloosa ancestry. These include the Pony of the Americas and the Colorado Ranger. Appaloosas were also crossbred with gaited horse breeds in an attempt to create leopard-spotted ambling horse breeds, including the Walkaloosa, the Spanish Jennet Horse, and the Tiger horse. Because such crossbred offspring are not eligible for ApHC registration, their owners have formed breed registries for horses with leopard complex patterns and gaited ability. In 1995 the Nez Perce tribe began a program to develop a new and distinct horse breed, the Nez Perce Horse, based on crossbreeding the Appaloosa with the Akhal-Teke breed from Central Asia. Appaloosa stallions have also been exported to Denmark to add new blood to the Knabstrupper breed. == Health issues ==
Health issues
Genetically linked vision issues Two genetically linked conditions are linked to blindness in Appaloosas, both associated with the Leopard complex color pattern. Appaloosas have an eightfold greater risk of developing Equine Recurrent Uveitis (ERU) than all other breeds combined. Up to 25 percent of all horses with ERU may be Appaloosas. Uveitis in horses has many causes, including eye trauma, disease, and bacterial, parasitic and viral infections, but ERU is characterized by recurring episodes of uveitis, rather than a single incident. If not treated, ERU can lead to blindness. Eighty percent of all uveitis cases are found in Appaloosas with physical characteristics including roan or light-colored coat patterns, little pigment around the eyelids and sparse hair in the mane and tail denoting the most at-risk individuals. Researchers may have identified a gene region containing an allele that makes the breed more susceptible to the disease. Appaloosas that are homozygous for the leopard complex (LP) gene are also at risk for congenital stationary night blindness (CSNB). This form of night blindness has been linked with the leopard complex since the 1970s, and in 2007 a "significant association" between LP and CSNB was identified. CSNB is a disorder that causes an affected animal to lack night vision, although day vision is normal. It is an inherited disorder, present from birth, and does not progress over time. Studies in 2008 and 2010 indicate that both CSNB and leopard complex spotting patterns are linked to TRPM1. Drug rules In 2007 the ApHC implemented new drug rules allowing Appaloosas to show with the drugs furosemide, known by the trade name of Lasix, and acetazolamide. Furosemide is used to prevent horses who bleed from the nose when subjected to strenuous work from having bleeding episodes when in competition, and is widely used in horse racing. Acetazolamide ("Acet") is used for treating horses with the genetic disease hyperkalemic periodic paralysis (HYPP), and prevents affected animals from having seizures. Acet is only allowed for horses that test positive for HYPP and have HYPP status noted on their registration papers. The ApHC recommends that Appaloosas that trace to certain American Quarter Horse bloodlines be tested for HYPP, and owners have the option to choose to place HYPP testing results on registration papers. Foals of AQHA-registered stallions and mares born on or after January 1, 2007 that carry HYPP will be required to be HYPP tested and have their HYPP status designated on their registration papers. On one side, it is argued that the United States Equestrian Federation (USEF), which sponsors show competition for many different horse breeds, and the International Federation for Equestrian Sports (FEI), which governs international and Olympic equestrian competition, ban the use of furosemide. On the other side of the controversy, several major stock horse registries that sanction their own shows, including the American Quarter Horse Association, American Paint Horse Association, and the Palomino Horse Breeders of America, allow acetazolamide and furosemide to be used within 24 hours of showing under certain circumstances. == Notes ==
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