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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 .
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.
[3]: 55 [5]: 132 The American Hampshire was not widespread at this time: a census in Indiana in 1907 found 337 head in a total of over 65 000 in the state, while an estimate of the numbers of pure-bred pigs nationwide reported 3000 Hampshires in a total of just under 164 000, in fifth place behind the Poland-China, the Duroc-Jersey, the ...
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.
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.
The breed grew in numbers into the mid-twentieth century, [7]: 198 particularly in Iowa, Illinois and Indiana, but from the 1960s, with the move of commercial pork operations to the modern system of three-way cross-breeding using American Yorkshire, Duroc and Hampshire, population numbers fell sharply. [4]: 611
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.