九龙牦牛与草地型牦牛杂交效果分析

摘要

The purpose was to provide the necessary technical support for improving the production performance of Grassland yak by Jiulong yak.By measuring the growth performance of Grassland yak and the F1 at different ages,and the slaughter performance,woolproduction performance of adult yak,the cross effect between Jiulong yak and Grassland yak was revealed. The result showed that the weight and body size of F1 at the age of born,6 months, 1.5 years,2.5 years,3.5 years,4.5 years were higher than those of Grassland yak, and so were the slaughter rate, net meat rate and average woolproduction quantity of the adult F1. It was concluded that there was a great hybrid vigor between Jiulong yak and Grassland yak.%为九龙牦牛杂交改良草地型牦牛提供必要的技术支持,对九龙牦牛与草地型牦牛杂交F1和草地型牦牛不同年龄段的生长性能、成年牦牛的屠宰性能、产毛性能等进行测定、比较和分析,揭示九龙牦牛与草地型牦牛的杂交效果.结果表明:九龙牦牛与草地型牦牛杂交F1在初生、0.5岁、1.5岁、2.5岁、3.5岁、4.5岁时的体尺体重均极显著高于草地型牦牛(P＜0.01),且其成年时的屠宰率、净肉率和头均产毛量也均高于草地型牦牛(P＜0.01).表明九龙牦牛改良草地型牦牛具有较大的优势.