In swine production, the method of breeding piglets through crossbreeding between different breeds and strains using their heterosis is called economical crossbreeding of pigs. The general hybrid offspring have strong vitality, rapid growth and development, high daily weight gain, and the province's feed is welcomed by farmers. As a result, some farmers have reared piglets on their own pigs, but the piglets they produce have had more stillbirths, and their survival has become stagnant pigs. This is because hybrid pigs are produced by the crossing of two breeds with certain genetic differences. The hybrids are even genetically unstable. They are used as the offspring produced by their parents. Most of them are not developed to heterosis; They are closely related to each other and are used as maternity mates that are closely related to each other. Nuclear contradictions ease, genetic differences are small, and the viability is reduced. In addition, severe trait isolation occurs in hybrid pigs from the first generation. Therefore, the offspring produced by using hybrid pigs as breeding pigs are necessarily small in size, have weak viability, and have poor disease resistance. It can be seen that a new generation of hybrid pigs can only be reared for hogs, and they should all be castrated for fattening and cannot be used for breeding pigs. Painlessly Silicone-Faced Dressing,Silicone-Faced Dressing,Comfortable Silicone-Faced Dressing,Flexible Silicone-Faced Dressing Zhende Medical Co.,Ltd , https://www.zdmedicalproducts.com