【摘要】 为研究略阳乌鸡体尺性状和体质量之间的内在关联性,在统一饲养条件下,对120只成年略阳乌鸡的体尺性状和体质量7个指标进行测定,选择累计贡献率达92.183 4%的5个主成分进行分析。结果表明:成年公鸡的体质量、体斜长、胸骨长、胫长、胸角均显著高于母鸡(P<0.05)。体尺指标胸宽、胸深、胫长及体质量在略阳乌鸡群体中的变异系数较大,选育潜力大。体质量与体斜长、胸宽、胸骨长、胫长呈极正显著相关(P<0.01),与胸深、胸角呈显著相关(P<0.05),其他性状间存在不同程度的相关性。主成分分析结果表明,各主成分的特征根分布较广,经统计计算入选的5个主成分所占信息的侧重各不相同,分别在一定程度上反映了略阳乌鸡的体型特征及今后选育的方向和重点。更多还原

【Abstract】 In this study,6 body measurement traits and body weight of 120 adult Lueyang black-bone chickens bred in the same management conditions were measured and analyzed by principal component analysis,for the choice of 5 principal components whose contributing rate accumulated up to 92.183 4% to study the relationships among all the traits in order.The results showed that the adult cock body weight,body diagonal length,sternum length,shank length,chest angle were significantly higher than those of the hen(P<0.05).There were big variation coefficient and breeding potential for chest width,chest deep,shank length and body weight in Lueyang black-bone chicken groups.There were high significant correlation between body weight and body diagonal length,chest width,sternum length,shank length(P<0.01),and body weight was significantly correlated to chest deep and chest angle(P<0.05).There were some direct correlations among the other traits.Principal component analysis indicated that the eigenvalue of each principal component distributed broadly and the five selected principal components for information on each were not identical by statistical calculation.To some extent,they reflected the Lueyang black-bone chicken’s bodily form feature and provided some clues for future breeding.更多还原