大白和长白猪大样本群体的繁殖性状遗传参数估计及影响因素分析

doi:10.11843/j.issn.0366-6964.2019.11.003

Abstract

Abstract: The aim of this study was to analyze the effects of different factors on the reproductive performance of large populations of Large White and Landrace pigs. At the same time, the genetic parameters of reproductive traits of Large White and Landrace pigs were estimated. The breeding records of 65 546 litters of Large White sows and the breeding records of 9 552 litters of Landrace sows in Wen's from 2013 to 2018 were selected. The SAS software GLM process was used to analyze 8 reproductive traits, and analyze the effects of 3 factors, including the parity, the birth parity and the estrus condition on reproductive performance. At the same time, DMU software was used to estimate the heritability of these traits, genetic correlation and phenotype correlation. The results showed that:1) In the analysis of influencing factors:In the two breeds, the sow delivery parity had a significant effect on all reproductive traits (P<0.001); In Large White pig, the birth parity of sow had significant effect on the 5 reproductive traits(P<0.05), and the effects of estrus on all reproductive traits were not significant; In Landrace pig, the birth parity of sows had significant effect on the number of weak litters and the weight of litter(P<0.05), the estrus factor had significant effects on the 5 reproductive traits(P<0.05). 2) In the estimation of genetic parameters:In Large White pig, the heritability of the weight of litter was the highest, which was 0.281, the heritability of the total number of litters, the number of born alive, the number of healthy birth, the number of weak litters and the number of stillbirths were in the range of 0.117-0.179; In Landrace pig, the heritability of the total number of litters was the highest, which was 0.190, the heritability of the number of born alive, the number of healthy birth, the number of weak litters and the weight of the litter were in the range of 0.100-0.176; In Large White pig, the genetic correlation coefficients between the total number of litters and the number of born alive, the total number of litters and the number of healthy birth, the number of born alive and the number of healthy birth, the number of healthy birth and the weight of the litter were all above 0.738, the phenotype correlation coefficients were above 0.717; In Landrace pig, the genetic correlation coefficients between total number of litters and the number of born alive, the total number of litters and the number of healthy birth, the number of born alive and the number of healthy birth were higher than 0.895, the phenotype correlation coefficients were higher than 0.791. The results of this study provide experimental data and theoretical basis for improving the reproductive performance of sows and accelerating the genetic progress of reproductive traits.

CLC Number:

S828.2

YAO Tianxiong, CHEN Dong, WU Zhenfang, XIAO Shijun, ZHANG Zhiyan, YANG Ming. Estimation of Genetic Parameters of Reproduction Traits and Analysis of Its Influencing Factors in Large Sample Populations of Large White and Landrace Pigs[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2019, 50(11): 2195-2207.

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Estimation of Genetic Parameters of Reproduction Traits and Analysis of Its Influencing Factors in Large Sample Populations of Large White and Landrace Pigs

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