小尾寒羊为母本二元及三元肉羊杂交模式杂种优势比较分析  

Comparative Analysis of Heterosis of Two-way and Three-way Cross Modes Mutton

作　　者：孙丽敏[1] 李佳蓉[1] 贾超[1] 姜怀志[1] 马龙 

机构地区：[1]吉林农业大学动物科学技术学院,吉林长春130118 [2]吉林乾安志华种羊繁育有限公司,吉林乾安131404

出　　处：《中国畜牧杂志》2017年第3期45-48,共4页Chinese Journal of Animal Science

基　　金：吉林省教育厅"十二五"科学技术项目(吉教科合字[2015]第186号);吉林省科技发展计划项目(20120802);吉林省现代农业产业技术体系建设专项基金(201541)

摘　　要：为探索吉林省西部农牧交错区最佳肉羊杂交生产模式,本研究分别对杜泊羊、萨福克羊与小尾寒羊杂交的二元杂交杜寒、萨寒F_1代羊,2个父本品种分别与二元杂交F_1代羊再次杂交获得三元杂交的杜萨寒F_1代羊、萨杜寒F_1代羊的体重、体尺指标和杂种优势率进行比较分析。结果表明:以小尾寒羊为母本的二元杂交、三元杂交的杂交F_1代羊,在初生、3月龄及周岁时的体重和胸围均表现出显著的杂种优势,二元杂交的杂种优势优于三元杂交。本研究说明杜泊羊和萨福克羊的体重大、胸围大的遗传基因均能稳定地遗传给后代,并且杜泊与小尾寒羊的杂交效果优于萨福克与小尾寒羊的杂交效果。To investigate the best cross modes of mutton in farming pastoral zone in Jilin province, the Small Tail Han sheep was selected as female parent while the Suffolk sheep and Dorper sheep were selected as male parent, four hybridization modes of Dorper×Han, Suffolk×Han, Dorper×Suffolk×Han, Suffolk×Dorper×Han were used to analyse the body weight, body size index and heterosis rate. The result showed that four hybridization modes showed significant heterosis, and the heterosis of two-way cross mode was better than tree-way cross mode. These results indicated that genetic genes of Suffolk sheep and Dorper sheep, which regulated body weight and bust, could be stably inherited to future generations. Moreover, the hybridization effect of Dorper sheep crossed with Small Tail Han sheep was better than Suffolk sheep crossed with Small Tail Han sheep.

关 键 词：二元杂交 三元杂交 杂种优势 小尾寒羊 杜泊羊 萨福克羊 

分 类 号：S826.2[农业科学—畜牧学]