摘要
对半野生大额牛13个体尺性状和体重指标进行测定,选择累计贡献率达88.819%的8个主成分进行分析。结果表明:大额牛成年公、母牛头部和管围差异极显著(P<0.01),体重和坐骨宽选育潜力相对较大,体重和胸围与体长显著相关,其它性状间存在不同程度的相关;各主分量的特征根分布较广,第一主成分反映出大额牛整个体型的生长发育状况,第二、第五和第八主成分主要反映的是大额牛肉用性能方面的特征,第三主成分有使大额牛体型变小的趋势,第四、第六和第七主成分反映的是大额牛役用方面的性能特征。
13 body size traits and boby weights of audit Gayal were measured and analysed by principal component analysis, to chose 8 principal components whose contributing rate accumulate up to 88. 819% and study the relationships among all the traits in order. The result showed that there exists significant difference （P 〈 0.01 ） in forehead width and shank circumference , there is big potential of mass selection for the boby weight and ischium width, there exists significant correlation among boby weight , boby length and heart girth, there are direct correlations of different levels among the rest traits, the eigenvalue of each principal component is distributed broadly, the first principal component reflects the entire growth and development condition of Gayal, second, the fifth and eighth principal components mainly reflects the beef cattle characteristics, the third principal component cause the reducing rendency of body size of Gayal, the fourth, sixth and seventh principal components reflect draft cattle characteristics.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2009年第4期589-593,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家"863"计划重点项目(2008AA101001)
关键词
大额牛
体尺指标
主成分分析
gayal
body measurement
principal component analysis
