A kind of breeding method of high-yield breeding pig

Abstract

The invention relates to the technical field of pig raising, and specifically discloses a breeding method for high-yield breeding pigs, which adopts a group subculture selection method combining open and closed breeding, and first establishes a stable basic group of Dan-line Landrace and Large White pigs through closed breeding And the base group of Landrace and Large White pigs of the British line, and then cross-breed the YX44 strain with a high number of live piglets and good reproductive performance while taking into account the lean meat rate and growth rate as the female parent, and cultivate the fast growth rate and high lean meat rate while taking into account the production and liveliness The YX55 strain with a high litter size was used as the male parent to form a high-yield breeding population and obtain high-yield breeding pigs. The high-yield breeding pigs bred by the method of the invention have high litter size, excellent reproductive performance, fast growth rate and high lean meat rate, and the hybrid method is simple and efficient.

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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