基于杜长大商品猪群体提高杜洛克公猪饲料效率相关性状的基因组选择准确性

doi:10.16431/j.cnki.1671-7236.2025.09.014

Abstract

Abstract: 【Objective】 This study was aimed to improve the genomic prediction accuracy for three feed efficiency-related traits in purebred Duroc boars by integrating data from Duroc boars and their crossbred offspring (Duroc×Landrace×Yorkshire pigs,DLY commercial pigs) using cross-population genomic selection. 【Method】 Phenotypic and genotypic data for average daily gain (ADG),average daily feed intake (ADFI),and feed to gain ratio (F/G) were collected from 1 138 Duroc boars and 4 346 DLY commercial pigs.Single-trait (ST-GBLUP) and multi-trait (MT-GBLUP) genomic best linear unbiased prediction models were employed,two reference population strategies were compared:①Only Duroc boars (group 1);②Combined Duroc boars and DLY commercial pigs (group 2).The effect on the prediction accuracy for these target traits in Duroc boars was evaluated. 【Result】 ADG,ADFI,and F/G showed moderate heritabilities (0.292-0.455) in both populations.Genetic correlations for the same traits between populations ranged from 0.386 (F/G) to 0.602 (ADG).Compared with group 1,the strategy in group 2 consistently improved the prediction accuracy for Duroc boars.Under the ST-GBLUP model,accuracies for ADG,ADFI,and F/G increased by 4.90%,17.18%,and 25.74%,respectively,and under the MT-GBLUP model,the respective increased by 1.69%,12.98%,and 16.32%,respectively. 【Conclusion】 Constructing a combined reference population by integrating data from purebred Duroc boars and DLY commercial pigs for cross-population genomic selection could effectively enhance the prediction accuracy for ADG,ADFI,and F/G in purebred Duroc boars.

Key words: Duroc boars; Duroc×Landrace×Yorkshire commercial pigs; feed efficiency; genetic parameters; genomic selection

CLC Number:

S828

GUO Meng, XIA Panjie, ZHOU Guangliang, YUAN Renqiang, ZHAO Yunxiang. Improving Genomic Selection Accuracy for Feed Efficiency-related Traits in Duroc Boars Based on Duroc×Landrace×Yorkshire Commercial Pigs Population[J]. China Animal Husbandry & Veterinary Medicine, 2025, 52(9): 4155-4162.

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Improving Genomic Selection Accuracy for Feed Efficiency-related Traits in Duroc Boars Based on Duroc×Landrace×Yorkshire Commercial Pigs Population

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