China Animal Husbandry and Veterinary Medicine ›› 2022, Vol. 49 ›› Issue (8): 2971-2981.doi: 10.16431/j.cnki.1671-7236.2022.08.013

• Genetics and Breeding • Previous Articles     Next Articles

Study on Genetic Evaluation of Reproductive and Growth Traits in Pigs by BLUP Method

YANG Tao1, ZHANG Mingjie2, XU Ran1, ZHANG Han1, ZHANG Mengmeng3, WU Keliang1   

  1. 1. College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
    2. Agriculture and Rural Affairs Bureau of Panzhihua City, Panzhihua 617000, China;
    3. Beijing Sunlon Livestock Development Company Limited, Beijing 100176, China
  • Received:2021-12-08 Online:2022-08-05 Published:2022-07-21

Abstract: 【Objective】 The aim of this study was to evaluate the genetic parameters of reproductive and growth traits in Duroc(DD),Landrace(LL) and Yorkshire (YY) pigs,and analyze the genetic trend changes of breeding values in different years,so as to provide a theoretical foundation for optimizing breeding programs.【Method】 The data of reproductive and growth traits in DD,LL and YY were used as the research materials.The 10 963 reproductive trait records,including total number born (TNB),number born alive (NBA),litter born weight (LBW) and litter weight at 21 days (LW21),and 25 257 growth trait records,including age at 100 kg live weight(AGE) and backfat adjusted to 100 kg(BF),were used in this study.The best linear unbiased prediction(BLUP) method based on animal model was used to estimate heritability,genetic correlation and breeding values by ASReml package.【Result】 The heritability of TNB,NBA and LBW ranged from 0.08 to 0.20,and the heritability of LW21 ranged from 0.02 to 0.05.The heritability of AGE and BF traits ranged from 0.22 to 0.37.The genetic correlation coefficients of reproductive traits of TNB,NBA,LBW and LW21 ranged from 0.20 to 0.97,which showed moderately positive correlations.The genetic correlation coefficients of AGE and BF ranged from -0.07 to -0.03,which showed slightly negative correlations.The genetic trend of reproductive traits of DD increased significantly,while that of LL and YY increased slightly.Among the growth traits,the genetic trends of AGE changed significantly,While the genetic trends of BF were varied less.【Conclusion】 This study accurately evaluated the genetic parameters and genetic trends of reproductive and growth traits of DD,LL and YY,the results could provide reference for the breeding work of the breeding field.

Key words: pigs; BLUP method; genetic evaluation; reproductive traits; growth traits

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