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Originally, the Duroc was a very large pig, but not as large as was the Jersey Red. Today, it is a medium-sized breed with a moderately long body and a slightly dished face. The ears are drooping and not held erect. The color is often an orangish-brown, but ranges from a light-golden shade to a deep mahogany-red. [1]
Duroc boars are bred with Large White Italiana or Italian Landrace sows, or more frequently with hybrid sows from those two breeds. The pigs are usually farmed intensively and are slaughtered at a weight of 160–170 kg ; the meat is almost all used to make preserved meat products such as Parma ham and prosciutto di San Daniele .
Breed Origin Height Weight Color Image Aksai Black Pied: Kazakhstan: 167–182 cm: 240–320 kg (530–710 lb) Black and White--- American Yorkshire: United States
The original breed by this name was the Danish Landrace pig, from which the others were derived through development and crossbreeding. The breed was so named because the foundation stock of the Danish Landrace were specimens from the local, free-breeding, non- pedigreed stock of swine, i.e., the regional landrace native to Denmark.
The Danish Landrace, Danish: Hvid Dansk Landrace, is a Danish breed of pig. It is of medium to large size, white in colour with a long body, fine hair, a long snout, and heavy drooping ears. It is of medium to large size, white in colour with a long body, fine hair, a long snout, and heavy drooping ears.
The American Landrace is a long, lean, white pig with 16 or 17 ribs. The head is long and narrow, the ears are large and heavy and hang forward close to the snout. The back is only slightly arched or is nearly flat. The side is even and well-fleshed and the ham is plump but not over-fat.
H. Kiessling added in 1912 that a landrace is a mixture of phenotypic forms despite relative outward uniformity, and a great adaptability to its natural and human environment. [7] The word landrace entered non-academic English in the early 1930s, by way of the Danish Landrace pig, a particular breed of lop-eared swine. [14]
Though not as popular as the Duroc, Yorkshire, or Hampshire, [8] the Chester White is actively used in commercial crossbreeding operations for pork. [6] The Chester White is the most durable of the white breeds; it can gain as much as 1.36 pounds (0.62 kg) a day and gain 1 pound (0.45 kg) for every 3 pounds (1.4 kg) of grain it is fed.