撒坝猪部分生长发育性状的典型相关分析

采用SAS统计分析系统对577头撒坝猪的3个体重性状和5个体尺性状进行了典型相关分析。结果表明,体重与体尺性状的第一、第二典型相关系数达到了显著水平(P<0.01),分别为0.9532和0.3044,占总相关的99.97%。体重性状与体尺性状间的相关主要是由于4月龄体重、6月龄体重与6月龄胸围、6月龄腿围的相关引起的。在达到显著水平的两对典型变量中,体重性状的两个典型变量对6月龄体长、胸围和腿围的预测能力较强,体尺性状的两个典型变量对4月龄体重和6月龄体重的预测能力较强,在实际育种中,选择体尺性状可同时达到提高体重性状之目的。

Canonical Correlation Analysis on Some Growth Traits of Saba Pig

The canonical correlation analysis was carried on 3 body weight traits and 5 body size traits in two groups from 577 Saba pigs by using SAS.The results showed that the first and second canonical correlation coefficients between body weight and size traits were significant(P<0.01).They were 0.9532 and 0.3044 respectively,which represented 99.97% for the total correlation between 2 groups.The correlation between boby weight and body size traits was caused by the correlation between 2 boby weight traits(body weight for 4 and 6 months)and 2 body size traits(chest circumference and ham circumference for 6 months).The results also showed that the two canonical variables of body weight traits could predict body length,chest circumference and ham circumference for 6 months,and the 2 canonical variables also could predict body weight for 4 and 6 months effectivy.It indicated that the body weight would be increased when selecting on body size in practice.