Regardless of the type of farm, first consider the issue of choosing what breed of pig to raise. The pig breeds in China are very rich. There are fine breeds of local pigs in Neijiang, Rongchang, Chenghua, Ya’nan, Liangshan pigs and Tibetan pigs. The common advantages of these local breeds are their strong adaptability, good meat quality, and the ability to breed pigs. The disadvantages are slower growth and weight gain, more fat, and lower feed utilization. The foreign breeder pigs introduced in Sichuan include Landrace, Yorkshire, Duroc, and Pietrain. The common advantages of these breeders are the fast growth, high feed utilization, and high lean meat ratio. The disadvantage is their adaptability. Poor, high requirements on feed and environmental conditions, poor quality of pork, etc.

Pigs are economical animals. Research results and production practices have proven that pig farms are not optimal in terms of selecting pure breed local breeds or pure breeds to introduce pig breeds to scale production. The most ideal way is to make full use of the principle of biological hybrid superiority and study the selection of the best male and female parent cross hybrids of the best varieties, that is, the most excellent hybrid pigs are used in production. The hybrid combination is the basic principle of applying genetics, after several times of hybridization experiments, the best combination of screening, and in the production of extended experiments to obtain stable and excellent results, approved by the relevant departments in order to promote the production of a large area. In different regions, due to the difference in market demand and agricultural production conditions, there are differences in the cross combinations that are popularized and applied, so avoid hearsay and blindly introduce hybrids.

After years of research and practice in China, most of the large-scale pig farms use Landrace and Yorkshire pigs to produce two-way hybrid sows, and then use Duroc pigs as the terminal father to produce three-way hybrid pigs. The heterosis of this three-way crossbreeding pig is prominent, and has the advantages of strong vitality, fast growth, high feed utilization, and lean meat, which is very popular in the market.

In addition, some foreign large-scale breeding pig companies set up breeding farms in China and promoted the company's unique combination of intellectual property rights, such as PIC, Topac, and Hypor. These matching pigs can obtain better production efficiency under better feeding and management conditions. The disadvantage is that due to the protection of intellectual property rights, the purchase of breeding pigs is restricted. For example, the breeding ground of parents' farms must purchase breeding pigs of the company's ancestral farms, otherwise the production effect will decline.

In recent years, the market has improved the meat quality and taste requirements of pigs. Domestically, the use of good local breeds to cross breeds with foreign pigs, and the selection of hybrid combinations for the production of high quality hogs, has achieved significant results and has been applied to production. It has been welcomed by consumers, such as Sichuan Tibet black pig, Beijing black pig and so on. These hybrid combinations containing local pig blood have improved pork quality, but the feeding period and unit weight consumption have increased, and the cost and pork price have increased.

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