Estimation of genetic parameters of pig reproductive traits

Frontiers in Veterinary Science

Veterinary Science

Jingyong Wang¹  Peng Zhu²  Ye Zhao²  Li Zhu²  Xidi Yang²  Lei Chen²  Linyuan Shen²  Lili Niu²  Yan Wang²  Mailin Gan²  Yiting Yang²  Wenqiang Cheng³  Hui Zhang⁴  Yi Luo⁵  Kangping Zhu⁵  Bin Liu⁵ 

[1] Chongqing Academy of Animal Science, Chongqing, China;Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, China;Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, China;National Animal Husbandry Service, Beijing, China;Sichuan Center for Animal Disease Control, Chengdu, China;Sichuan Dekon Livestock Foodstuff Group, Chengdu, China;

关键词: reproductive traits;    genetic parameters;    animal mixed linear model;    influencing factors;    pig breeding;   

DOI  :  10.3389/fvets.2023.1172287

 received in 2023-02-23, accepted in 2023-06-01,  发布年份 2023

来源: Frontiers

【 摘 要 】

IntroductionIn this study, we aimed to estimate the genetic parameters of the reproductive traits in three popular commercial pig breeds: Duroc, Landrace, and Yorkshire. Additionally, we evaluated the factors that influence these traits.MethodWe collected data from a large number of litters, including 1,887 Duroc, 21,787 Landrace, and 74,796 Yorkshire litters. Using the ASReml-R software to analyze 11 traits, which included: total number of pigs born (TNB); number of piglets born alive (NBA); number of piglets born healthy (NBH); number of piglets born weak (NBW); number of new stillborn piglets (NS); number of old stillborn piglets (OS); number of piglets born with malformation (NBM); number of mummified piglets (NM); total litter birthweight (LBW); litter average weight (LAW); duration of gestational period (GP). We investigated the effects of 4 fixed factors on the genetic parameters of these traits.ResultsAmong the 11 reproductive-related traits, the gestational period belonged to the medium heritability traits (0.251–0.430), while remaining traits showed low heritability, ranging from 0.005 to 0.159. TNB, NBA, NBH, LBW had positive genetic correlation (0.737 ~ 0.981) and phenotype correlation (0.711 ~ 0.951). There was a negative genetic correlation between NBW and LAW (−0.452 ~ −0.978) and phenotypic correlation (−0.380 ~ −0.873). LBW was considered one of the most reasonable reproductive traits that could be used for breeding improvement. Repeatability of the three varieties was within the range of 0.000–0.097. In addition, the fixed effect selected in this study had a significant effect on Landrace and Yorkshire (p < 0.05).DiscussionWe found a positive correlation between LBW and TNB, NBA, and NBH, suggesting the potential for multi-trait association breeding. Factors such as farm, farrowing year, breeding season, and parity should be taken into consideration in practical production, as they may impact the reproductive performance of breeding pigs.

【 授权许可】

Unknown   
Copyright © 2023 Yang, Gan, Yang, Zhu, Luo, Liu, Zhu, Cheng, Chen, Zhao, Niu, Wang, Zhang, Wang, Shen and Zhu.