青海高原牦牛体尺和体重性状相关性的统计学分析

Correlation analysis of body size and body weight traits in Qinghai plateau yaks

中文关键词: 牦牛  体尺  体重  相关性分析

英文关键词: yak  body size  weight  correlation analysis  principal component analysis

中文摘要:

      为了解牦牛不同性别和年龄的体尺性状数据表现和相关性，实验采集146头健康的牦牛性别、年龄、体高、体斜长和胸围的数据，使用SPSS软件分析牦牛各体尺指标与体重之间相关性，并用SAS软件分析性别年龄对牦牛体尺的影响。结果表明，牦牛的体高、体斜长和胸围有显著的相关性，其中牦牛的胸围变异系数和标准差权衡数值最大，有较高的选育价值。此外，性别和年龄会对牦牛的选育产生很大影响，根据牦牛性别和年龄制定合适的选育标准。根据体尺估算不同性别和年龄的牦牛，发现体尺数据表现良好的牦牛在体重上同样表现良好。

英文摘要:

      In order to understand the performance and correlation of different sex and age, the data of sex, age, body height, body length and chest circumference, analyzed the correlation between each body size and body weight, and analyzed the influence of sex and age on body size with SAS software. The results showed that the body height, body oblique length and chest circumference were significantly correlated, in which the body weight variation coefficient and standard deviation were the largest, with high breeding value. Moreover, gender and age can have a great impact on yak breeding, and appropriate breeding criteria are established according to their gender and age. Yaks of different sex and age were estimated from body size, and we found that yaks with good body size data performed equally well in weight.