新疆褐牛体尺体重相关性及主成分分析

摘要

在建立新疆褐牛9分制的鉴定标准过程中,通过对伊犁地区新源县、尼勒克县、昭苏县3个牛场中的569头新疆褐牛成年母牛进行测量,选取13个体重体尺性状进行相关性及主成分分析.结果表明:新疆褐牛体重与体高、体斜长、胸围、腹围、尻宽、尻长、后腿宽度、后腿厚度、后腿半围等具有极显著相关性(P＜0.01);13个主成分中第1主成分的贡献率最大,反映了新疆褐牛的外貌整体结构信息,第2和第3主成分反映了后躯特征和尻部特征.%In the process of establishing the identification standard of Xinjiang brown cattle 9th point system,569 Xinjiang brown cattle adult cattle in three cattle farms:Xinyuan County,Nileke County and Zhaoxu County of Yili Prefecture were measured and 13 body size traits correlation and principal component analysis was carried out.The results showed that the body weight of Xinjiang brown cattle had a significant correlation with body height,body length,chest circumference,abdomen,rump width,rump length,hind leg width,hind leg thickness and hind legs (P ＜0.01);13 The contribution of the first principal component in the principal component is the largest,which reflects the overall structure of the Xinjiang brown cattle,and the second and third principal components reflect the hindquarters and the rump characteristics.