荷斯坦牛体型线性性状对泌乳量的主成分分析

Principal Component Analysis between Body Conformation Linear Traits and Milk Yield in Holstein Cows

在荷斯坦牛体型性状与泌乳量相关性分析的基础上进行主成分分析,选取累计贡献率达85％以上的前9个主成分,并进行这9个主成分与泌乳量的相关分析。结果表明,主成分Ⅰ、Ⅱ是荷斯坦牛泌乳量选择时应考虑的主要指标。

Principal component analysis based on correlation analysis between body conformation linear traits and milk yield was conducted, the first nine components whose cumulative contribution were accumulated more 85% were selected, and the correlation relationship was studied between them and milk yield. The results showed that the principal components I and I were the key indexes to be considered while milk yield of Holstein cows was rselected.