Evaluating method of sow comprehensive fertility and application thereof to pig breeding

Abstract

The invention discloses an evaluating method of sow comprehensive fertility and application thereof to pig breeding. The method includes the steps of introducing new maternal line indexes to evaluatesow fertility, wherein the new maternal line indexes include weights of the corrected day age of sows reaching the weight of 100 kg being 30%, the corrected back fat thickness of the sows reaching theweight of 100 kg being 30%, the total farrowing number being 30% and the piglet birth weight uniformity being 10%; weeding out all the sows with the new maternal line indexes lower than 100 for the backup sows, weeding out the sows with low comprehensive fertility according to the number of nipples and appearance standard, and evaluating the comprehensive fertility of the sows according to the total farrowing number, the milkability and the new maternal line indexes for the multiparous sows. By means of the method, the sows with the poor fertility and milkability can be weeded out in time, the high-level fertility and milkability of the core herd of sows are kept, the genetic progress and phenotypic progress of herds are accelerated, and the production level and earnings level of a breeding farm and a radiation propagation sow farm are improved.

Description

technical field [0001] The invention relates to the technical field of sow breeding and population selection, in particular to a comprehensive evaluation method for sow fecundity and offspring production performance and its application in pig breeding and production. Background technique [0002] At present, in the genetic evaluation of breeding pigs in my country, the comprehensive selection index is mainly used, that is, the paternal index and the maternal index. Among them, the large white pig is selected and retained, and the female line index (Dam Line Index, DLI) is used. In order to improve the growth and reproductive performance, the maternity index includes the three traits of up to 100kg weight-adjusted age (AGE), up to 100kg weight-adjusted backfat thickness (BF) and total litter size (TNB). In recent years, after the research of the expert group of the National Breeding Pig Genetic Evaluation Center and the opinions of various pig enterprises, the weighting regula...

AI Technical Summary

Problems solved by technology

The evaluation of comprehensive fecundity of sows plays an extremely important auxiliary role in maintaining the high-level reproductive performance of sows in the core group and accelerating the genetic and phenotypic progress of the population. However, the existing methods for evaluating sow fecundity do not take into account the Weight uniformity and lactating ability of sows lead to deviations in evaluation results when evaluating sows' comprehensive fertility, and some sows with low birth weight uniformity of piglets were not eliminated in time, resulting in piglets with higher The mortality rate increases the production cost of the pig farm, which is not conducive to improving the overall production level of the pig farm, and is not conducive to accelerating the genetic and phenotypic progress of the population

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