巴美肉羊体重与体尺性状的相关性分析及选育效果

Correlation Analysis and Breeding Progress of Body Weight and Body Size of Bamei Mutton Sheep

为探讨巴美肉羊体重与体尺指标间的相关性及近3年的选育效果,选择2~6岁、健康状况良好的成年巴美肉羊273只,测定其体重(y)、体高(x_(1))、体长(x_(2))、胸围(x_(3))和胸宽(x_(4)),并分析各指标间的相关性,模拟体重体尺最优回归方程。结果显示,巴美肉羊公羊体重和体尺性状均极显著高于母羊(P<0.01)。公羊中共有5对性状呈极显著相关(P<0.01),有3对性状呈显著相关(P<0.05);母羊中共有10对性状呈极显著相关(P<0.01)。公母羊体重和体尺显著或极显著相关的性状均呈正相关。成年巴美肉羊母羊体重估计的最优回归方程为:y=0.62x_(3)+0.94x_(2)+0.29x_(1)-94.75。与2018年相比,巴美肉羊近3年在体重和体长上选育效果显著。

In order to explore the relationship between the body weight and body size of the Bamei mutton sheep,the body weight(y)and body height(x_(1)),body length(x_(2)),chest circumference(x_(3))and chest width(x_(4))of adult sheep were measured,then integrate 2018 data for statistical analysis.The results showed that the body weight and body size of rams were extremely significantly higher than those of ewes(P<0.01).A total of five pairs of traits were extremely significantly correlated(P<0.01),and three pairs of traits were significantly correlated(P<0.05)in rams,ten pairs of traits in ewes were extremely significantly correlated(P<0.01),and all of these correlations were positively.The optimal regression equation for the weight estimation of adult Bamei mutton ewes was:y=0.62x_(3)+0.94x_(2)+0.29x_(1)-94.75.Compared with 2018,Bamei mutton sheep had achieved remarkable results in weight and length breeding in recent three years.