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

发布时间：2018-04-25 09:24

本文选题：二元杂交 + 三元杂交　；参考：《中国畜牧杂志》2017年03期

【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。
[Abstract]:In order to explore the best cross production model of meat sheep in the ecotone of agriculture and animal husbandry in the west of Jilin Province, this study studied the duplex crossing of du Bo sheep, Suffolk sheep and small tail Han sheep. The body weight, body size index and heterosis rate of the first generation of Dusa cold F _ (1) sheep and the first generation of Saadu cold F _ (1) sheep were compared and analyzed. The results showed that the weight and chest circumference at 3 months old and one year of age showed significant heterosis in the two-hybrid of small tail Han sheep, and the hybrid heterosis of two-way crossing was superior to that of three-way crossing in the first generation of F _ 1. The heterosis of two-hybrid was better than that of three-way crossing in body weight and chest circumference at the age of 3 months at birth and at the age of one year. The results showed that the genes with large body weight and large chest circumference could be inherited to the offspring stably, and the cross effect between Dupo and Small-tailed Han Sheep was better than that between Suffolk and Small-tailed Han Sheep.
【作者单位】：吉林农业大学动物科学技术学院;吉林乾安志华种羊繁育有限公司;
【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)
【分类号】：S826

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