凉山半细毛羊几个早期性状遗传参数的估测  

Genetic parameter estimation for three early traits of Liangshan semi-fine wool sheep

作　　者：杨平贵[1] 吴登竣[2] 

机构地区：[1]四川省草原研究所,四川成都611731 [2]四川农业大学

出　　处：《畜禽业》2006年第2期12-13,共2页Livestock and Poultry Industry

摘　　要：利用凉山半细毛羊核心育种场1997-2003年间的育种资料,系谱经过微卫星标记校正后,用MTDFREML软件估测了初生重(BWT,n=1 282)、断奶重(WWT,n=1 000)和断奶毛长(WSL,n=909)三个性状的方差组分和遗传参数。结果表明BWT、WWT和WSL的遗传方差、不相关的随机效应方差(永久环境效应方差)所占的比例较小,残差方差所占的比例较高。三个性状的遗传力分别为0.24、0.06、0.13,相应的遗传相关系数分别为0.87-、0.53和-0.52。After revising pedigree by micresatellite DNA markers, the breeding data from 1997 to 2003 of Liangshan semi-fine wool sheep at the nuclear breeding farm was used for this study. Estimated the variances （covariances） and genetic parameters for birth weight （BWT, n=1282）, weaning weight （WWT, n=1 000） and weaning staple length （WSL, n=909） by using MTDFREML. The results showed that the proportions of genetic variance, uneorrelated random effect variance （permanent environmental effect variance） about BWT, WWT, WSL were low, but the proportions of residual variance were high. The heritability of BWT, WWT and WSL were 0.24, 0.06 and 0.13, respectively. Relate genetic correlation coefficients were 0.87, -0.53 and - 0.52.

关 键 词：凉山半细毛羊 遗传参数 母体效应 初生重 断奶重 断奶 毛长 

分 类 号：S826.2[农业科学—畜牧学]