芦花鸡H系开产性状的遗传参数和育种值估计  

Estimation of Genetic Parameters and Breeding Values of Traits at the First Egg in Barred H Chickens

作　　者：薛倩 李国辉[1,2] 殷建玫[1,2] 周成浩 郭军[2] 张会永[1,2] 蒋一秀 朱云芬[1,2] 邢伟杰 韩威[1,2] XUE Qian;LI Guohui;YIN Jianmei;ZHOU Chenghao;GUO Jun;ZHANG Huiyong;JIANG Yixiu;ZHU Yunfen;XING Weijie;HAN Wei(Science and Technology Innovation Co.,Ltd.,Jiangsu Institute of Poultry Science,Yangzhou,Jiangsu 225125;Jiangsu Institute of Poultry Sciences,Yangzhou,Jiangsu 225125)

机构地区：[1]江苏省家禽科学研究所科技创新有限公司,江苏扬州225125 [2]江苏省家禽科学研究所,江苏扬州225125

出　　处：《中国家禽》2023年第9期20-24,共5页China Poultry

基　　金：江苏省重点研发计划(现代农业)专项(BE2019353);江苏省自然科学基金面上项目(BK20221285)。

摘　　要：试验旨在进行芦花鸡H系开产性状遗传参数和育种值估计,为芦花鸡H系选育提供依据。收集芦花鸡H系2016—2020年系谱信息和开产性状表型数据,利用DMU软件以平均信息约束最大似然法(AIREML)剖分表型方差,以单性状动物模型分析各性状遗传力,以多性状动物模型分析性状间的遗传相关系数和表型相关系数,并基于系谱-加性效应模型(PBLUP_A)对所有个体开产性状进行育种值估计,计算遗传进展。结果显示:芦花鸡H系开产日龄、开产体重和开产蛋重遗传力分别为0.42、0.40和0.27,开产日龄与开产体重、开产蛋重间的遗传相关分别为0.17、0.31,表型相关分别为0.11、0.18,开产体重和开产蛋重间遗传相关和表型相关系数分别为0.56和0.38;开产日龄、开产体重和开产蛋重年遗传进展分别为-0.014 d、1.14 g、0.018 g。结果表明:芦花鸡H系各开产性状均为中等遗传力性状,开产蛋重与开产日龄呈中等遗传正相关,与开产体重呈高遗传正相关,开产日龄与开产体重遗传相关较低,经过5个世代的选育,芦花鸡H系开产性状有了一定的遗传进展。对芦花鸡H系开产性状遗传参数和育种值的确定与分析研究结果,为芦花鸡H系选育制定适宜的综合选择指数、选育方案以及加快选育进程提供科学依据。In order to provide a basis for the future breeding of Barred H chickens,the genetic parameters and breeding values of traits at the first egg were estimated.Reproduction data and pedigree information of Barred H chickens from 2016 to 2020 were collected.Phenotypic variance of traits at the first egg was partitioned using average information restricted maximum likelihood(AIREML)method with DMU software.Univariate animal models were used to estimate heritabilities,and multivariate animal models were used to analyze genetic and phenotypic correlations.Based on the pedigree additive effect model(PBLUP_A),the individual breeding values of each trait were estimated,and the genetic progress was calculated.The results showed that the heritabilities of age,body weight and egg weight at the first egg were 0.42,0.40 and 0.27.The genetic correlations between age at the first egg with body weight and egg weight at the first egg were 0.17 and 0.31,respectively,and the phenotypic correlations were 0.11 and 0.18.The genetic and phenotypic correlation coefficients between body weight and egg weight at the first egg were 0.56 and 0.38,respectively.The genetic gains of age,body weight and egg weight at the first egg were-0.014 d,1.14 g and 0.018 g,respectively.Therefore,all traits at the first egg in Barred H Chicken were of medium heritability.There was a moderate genetic positive correlation between egg weight and age at the first egg,a high genetic positive correlation between egg weight and body weight at the first egg,and a low genetic correlation between age and body weight at the first egg.And after five generations′breeding,traits at the first egg in Barred H chicken had certain genetic gains.The results of this study provided scientific basis for establishment of appropriate comprehensive selection index,selection scheme and speeding up the breeding process of Barred H chickens.

关 键 词：芦花鸡H系 开产性状 遗传参数 育种值 遗传进展 

分 类 号：S831.2[农业科学—畜牧学]