牛生长性状、肉质性状和胴体性状间典型相关分析

通过对牛生长性状、肉质性状和胴体性状指标的研究,分析3组性状组内及组间的相关性,揭示牛不同类型性状间的相互影响。测量记录327头牛3组性状的表型值,利用简单相关分析和典型相关分析对3组性状相关性进行深入研究。17个性状间共有74对存在极显著简单相关(P0.01),多数相关系数低于0.5。典型相关分析结果表明,3组性状间第一、第二和第三典型相关系数均达到极显著水平(P0.001),其中生长性状与肉质性状间、生长性状与胴体性状间、肉质性状与胴体性状间的第一和第二典型相关系数分别为0.525和0.350、0.993和0.623、0.698和0.394。结果显示,典型相关分析比简单相关能更准确、全面反映3组性状间的相关关系,为肉牛的选育提供科学依据。

Canonical Correlation Analysis of Bovine Growth Traits, Meat Quality Traits and Carcass Traits

The indices of bovine growth traits, meat quality traits and carcass traits were studied to analyze the correlation within/between the 3 groups and reveal the interaction between traits in each groups. The phenotypic values of 17 traits from 327 steers were used to analyze the correlation in-depth study by ordinary correlation analysis and canonical correlation analysis. A total of 74 pairs of traits were highly significant ordinary correlation between 17 traits (P<0.01), and most correlation coefficients were below 0.5.The canonical correlation analysis showed that highly significant correlation coefficients of the first、second and third canonical correlation were obtained between the 3 groups(P<0.001). The first and second canonical correlation coefficients between growth traits and meat quality traits, growth traits and carcass traits, meat quality traits and carcass traits were 0.525 and 0.350，0.993 and 0.623，0.698 and 0.394, respectively. The canonical correlation analysis can more accurately reflect the correlation between traits of 3 groups than ordinary correlation analysis, and benefit for breeding and selecting of beef cattle.