What are the common characteristics of China's local breed pigs, cultivar breeders, and imported foreign breeders? How to properly use these breeds of pigs?
1. Local breeds At present, local breed pigs in China can be said to be numerous and varied. The common characteristics of these local breed pigs are early sexual maturity, multiple litter size, resistance to roughage, good meat quality, and slow growth. For local breeds of pigs in China, they must be used on the basis of conservation. These local breeds are important gene pools of pigs in the world. Because these local breeds of pigs have specific good traits, the breeding of new varieties and hybridization Use has an important significance. For example, the Taihu pig is currently the most productive breed in the world, and the northeastern population has a good meat variety.
2. Breeding breeds This type of pig is a new type of pig breed that has been formed through long-term breeding, breeding and self-breeding (locking and breeding) of existing breeds of pigs. Such as: Habai Pig, Sanjiang White Pig, New Golden Pig, Beijing Black Pig. For breeder pigs, maternal pig breeds that form a mating line can be selected to produce superior heterotic pigs.
3. Introduced varieties refer to fine pig breeds imported from abroad in recent years. Such as Landrace, Yorkshire, Duroc, Pittland, and Hampshire. These introduced breed pigs have 7 major characteristics: (1) large size, back waist arch, high limbs; (2) fast growth, daily weight gain of 550 to 650 grams during 20 to 90 kg body weight; (3) carcass Lean meat rate is high. The carcass lean rate at the slaughter of 90 kg body weight can reach 55% to 62%; (4) the sow has a low number of litters and the estrus is not obvious; (5) the meat quality is poor; (6) the anti-stress capacity is poor; (7) High requirements for feeding and management conditions; (8) There are two main aspects for the use of imported pigs: the use of imported pigs can produce large quantities of binary crossbred pigs, three-way crossbred pigs, and four-way crossbred pigs; further breeding of introduced pigs The pedestal pig breeds of the mating line were formed and the production of the supporting line of hybrid pigs was carried out.
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