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The New Forest pony is one of the recognised mountain and moorland or native pony breeds of the British Isles. Height varies from around ; ponies of all heights should be strong, workmanlike, and of a good riding type. They are valued for hardiness, strength, and sure-footedness. The breed is indigenous to the New Forest in Hampshire in southern England, where equines have lived since before the last Ice Age; remains dating back to 500,000 BC have been found within of the heart of the modern New Forest. DNA studies have shown ancient shared ancestry with the Celtic-type Asturcón and Pottok ponies. Many breeds have contributed to the foundation bloodstock of the New Forest pony, but today only ponies whose parents are both registered as purebred in the approved section of the stud book may be registered as purebred. The New Forest pony can be ridden by children and adults, can be driven in harness, and competes successfully against larger horses in horse show competition. All ponies grazing on the New Forest are owned by New Forest commoners – people who have "rights of common of pasture" over the Forest lands. An annual marking fee is paid for each animal turned out to graze. The population of ponies on the Forest has fluctuated in response to varying demand for young stock. Numbers fell to fewer than six hundred in 1945, but have since risen steadily, and thousands now run loose in semi-feral conditions. The welfare of ponies grazing on the Forest is monitored by five Agisters, employees of the Verderers of the New Forest. Each Agister takes responsibility for a different area of the Forest. The ponies are gathered annually in a series of drifts, to be checked for health, wormed, and they are tail-marked; each pony's tail is trimmed to the pattern of the Agister responsible for that pony. Purebred New Forest stallions approved by the Breed Society and by the New Forest Verderers run out on the Forest with the mares for a short period each year. Many of the foals bred on the Forest are sold through the Beaulieu Road pony sales, which are held several times each year. == Characteristics == Standards for the breed are stipulated by the New Forest Pony Breeding and Cattle Society. The maximum height allowed is . Although there is no minimum height standard, in practice New Forest ponies are seldom less than . In shows, they normally are classed in two sections: competition height A, and under; and competition height B, over . New Forest ponies should be of riding type, workmanlike, and strong in conformation, with a sloping shoulder and powerful hindquarters; the body should be deep, and the legs straight with strong, flat bone, and hard, rounded hooves. Larger ponies, although narrow enough in the barrel for small children to ride comfortably, are also capable of carrying adults. Smaller ponies may not be suitable for heavier riders, but they often have more show quality. The New Forest pony has free, even gaits, active and straight, but not exaggerated, and is noted for sure-footedness, agility, and speed. The ponies are most commonly bay, chestnut, or grey. Few coat colours are excluded: piebald, skewbald, and blue-eyed cream are not allowed; palomino and very light chestnut are only accepted by the stud book as geldings and mares. Blue eyes are never accepted. White markings on the head and lower legs are allowed, unless they appear behind the head, above the point of the hock in the hind leg, or above the metacarpal bone at the bend in the knee in the foreleg.〔 Ponies failing to pass these standards may not be registered in the purebred section of the stud book, but are recorded in the appendix, known as the X-register. The offspring of these animals may not be registered as purebred New Forest ponies, as the stud book is closed and only the offspring of purebred-approved registered ponies may be registered as purebred.〔 New Forest ponies have a gentle temperament and a reputation for intelligence, strength, and versatility. On the whole, they are a sturdy and hardy breed. The one known hereditary genetic disorder found in the breed is congenital myotonia, a muscular condition also found in humans, dogs, cats, and goats. It was identified in the Netherlands in 2009, after a clinically affected foal was presented to the Equine Clinic of Utrecht University. DNA sequencing revealed that the affected foal was homozygous for a missense mutation in the gene encoding CLCN1, a protein which regulates the excitability of the skeletal muscle.〔(【引用サイトリンク】 url = http://www.ncbi.nlm.nih.gov/omia/3326 )〕 The mutated allele was found in both the foal's parents, its siblings, and two other related animals, none of whom exhibited any clinical signs. The researchers concluded that the condition has an autosomal recessive mode of inheritance, whereby both parents have to contribute the mutated allele for a physically affected foal to be produced with that phenotype. The study suggested that the mutation was of relatively recent origin: the founder of the mutated gene, as all the ponies who tested positive for the mutation are direct descendants of this stallion.〔 The probable founder stallion has been identified as Kantje's Ronaldo; testing is now underway to identify which of his offspring carry the mutated gene. All carriers will be removed from the breeding section of the New Forest Pony Breeding & Cattle Society's stud book, and all New Forest stallions licensed in the UK also will be tested, whether or not they descend from Kantje's Ronaldo, to cover the possibility that the mutated gene may have appeared earlier in the pedigree, although it is believed that the mutated gene has now been eradicated from the British breeding stock. All breeding stock imported to the UK also will be tested. 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「New Forest pony」の詳細全文を読む スポンサード リンク
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