Breeding method for high yield breeding pigs

Abstract

The invention relates to the technical field of pig farming, and particularly discloses a breeding method for high yield breeding pigs. According to the breeding method, a group subculture breeding method combining opened breeding and closed breeding is adopted, Danxi landrace and landrace foundation groups as well as Yingxi landrace and landrace foundation groups, which are stable, are established by closed breeding, then cross-breeding is performed, YX44 lines which are high in yield of living piggies, good in reproductive performance and high in lean meat factors and growth speed are obtained as female parents, YX55 lines which are high in growth rate, high in lean meat factors and high in yield of living piggies are obtained as male parents, and a high-yield breeding group is established, so that the high yield breeding pigs are obtained. The high yield breeding pigs bred by the method are high in yield of piggies, good in reproductive performance, high in growth speed, high in lean meat factors, and simple and efficient in hybridizing manner.

Description

technical field [0001] The invention belongs to the technical field of pig raising, in particular to a method for breeding high-yield breeding pigs. Background technique [0002] Among the many factors affecting pig production, the key factor is breed. Only breeds with excellent performance can obtain the maximum output and economic benefits under the same feeding and management conditions. my country imports a large number of breeding pigs from abroad every year. However, due to the emphasis on introduction and neglect of breeding, pig breeding work is generally not in place, the breeding system is not perfect, and the genetic level of the pig herd is declining year by year. Eventually, the breeding pig herd has to be eliminated and a large number of breeding pigs have to be reintroduced. Caught in the vicious cycle of "introduction-maintenance-degeneration-reintroduction". The selection of breeding pigs with excellent performance can significantly improve the quantity and ...

AI Technical Summary

Problems solved by technology

The disadvantage is that the scale is small, the original selection intensity cannot be reached, and the selection progress of each generation is reduced; and a large number of breeding pigs need to be replaced every year, requiring a large core group of breeding pigs, and the cost is high; and practice has proved that the genetic base is narrow, Long-term latch-up tends to cause inbreeding degeneration. The first few generations show breeding progress, and then weaken

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