湖南农业大学学报（自然科学版）2025，Vol.51Issue(3)：50-54,5.DOI:10.13331/j.cnki.jhau.2025.03.007
基于多效应重复力模型预测长大二元杂交猪的杂种优势
Heterosis prediction based on multi-effect repeatability model for Landrace×Yorkshire sows
摘要
Abstract
Using fertility trait data and pedigree information from Landrace,Yorkshire,and their crossbred Landrace×Yorkshire sows,three heterosis prediction models MA,MAD and MADE were constructed by stepwise adding additive effects(A),dominance effects(D)and epistatic effects(E)to a single-trait repeatability model(M).The accuracy of these models in predicting hybrid phenotypes and heterosis in crossbred offspring was compared.The results showed that the MA model,which included only additive effects,had higher prediction accuracy for phenotypes(0.290-0.720)compared to the MAD model(0.173-0.687)and the MADE model(0.055-0.365),both of which also incorporated non-additive effects.The MA model outperformed the other two models in predicting heterosis rates for 7 reproductive traits including litter weight at birth(25.41%),total number born(-25.26%),number of liveborn piglets(-26.11%),number of healthy piglets(-24.89%),number of weak piglets(-29.30%),number of stillborns(-37.25%)and number of mummified piglets(-44.88%).The MAD model was more reliable and of greater reference value in predicting heterosis rates for 4 reproductive traits including number of deformities(41.85%),number of piglets weaned(18.90%),weaning litter weight(18.29%)and 21-day litter weight(14.56%).关键词
长大二元杂交猪/杂种优势/多效应重复力模型/加性效应/非加性效应/显性效应/上位效应Key words
Landrace×Yorkshire sows/heterosis/multi-effect repeatability model/additive effect/non-additive effect/dominance effects/epistatic effects分类
农业科技引用本文复制引用
王旭,朱磅强,向清文,谌烁楷,闫煜博,张跃博,高宁,何俊..基于多效应重复力模型预测长大二元杂交猪的杂种优势[J].湖南农业大学学报（自然科学版）,2025,51(3):50-54,5.基金项目
湖南省创新型省份建设专项(2021NK1009) （2021NK1009）
湖南省自然科学基金项目(2022JJ30286) （2022JJ30286）
湖南省科技人才托举工程项目(2022TJ-Q15) （2022TJ-Q15）
