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

摘要/Abstract

摘要： 【目的】通过整合纯种杜洛克公猪及其杂交后代(杜长大商品猪)数据，利用跨群体基因组选择方法，提高杜洛克公猪3个饲料效率相关性状的基因组预测准确性。【方法】本研究以1 138头杜洛克公猪和4 346头杜长大商品猪的平均日增重(ADG)、平均日采食量(ADFI)和料重比(F/G)为研究对象，采用单性状(ST-GBLUP)和多性状(MT-GBLUP)基因组最佳线性无偏预测模型，比较了两种参考群方案(杜洛克公猪(组1)、杜洛克公猪+杜长大商品猪(组2))对杜洛克公猪目标性状预测准确性的影响。【结果】 ADG、ADFI和F/G在两个群体中均表现为中等遗传力(0.292～0.455)；群体间相同性状的遗传相关在0.386(F/G)～0.602(ADG)之间。相较于组1，组2的方案提高了杜洛克公猪的预测准确性：ST-GBLUP模型下ADG、ADFI、F/G准确性分别提升了4.90%、17.18%和25.74%；MT-GBLUP模型下分别提升了1.69%、12.98%和16.32%。【结论】合并杜洛克公猪及杜长大商品猪数据构建参考群进行跨群体基因组选择，可有效提高纯种杜洛克公猪ADG、ADFI和F/G的预测准确性。

关键词: 杜洛克公猪; 杜长大商品猪; 饲料效率; 遗传参数; 基因组选择

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

中图分类号:

S828

郭猛, 夏攀洁, 周光亮, 袁仁强, 赵云翔. 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[J]. 中国畜牧兽医, 2025, 52(9): 4155-4162.

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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