The Beijing Black, also known as the Peking Black, is a breed of domestic pig

Domestic pig

The domestic pig is a domesticated animal that traces its ancestry to the wild boar, and is considered a subspecies of the wild boar or a distinct species in its own right. It is likely the wild boar was domesticated as early as 13,000 BC in the Tigris River basin...

 from China

China

Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...

. They are mostly black, but have some white markings. The breed was created in 1962 by cross-breeding a Berkshire

Berkshire (pig)

Berkshire pigs are a rare breed of pig originating from Berkshire in England.Herds of the breed are still maintained in England by the Rare Breeds Survival Trust at Aldenham Country Park, Hertfordshire, and by the South of England Rare Breeds Centre in Kent. The Berkshire is listed as 'vulnerable',...

 with a common Chinese pig. Two other breeds, the Soviet White and the Yorkshire, were also crossbred with native Chinese pigs. It is described as being a "strong, rugged breed" that has "good production traits".

Breeding

In order to decide which pigs are chosen to breed new litters, several factors are considered, which include "litter size at birth and weaning, weight at weaning, and weight and backfat thickness at 6 months of age". The pigs that pass these requirements breed with Beijing Black pigs of other lines to create greater variety.