饲料研究2025，Vol.48Issue(6)：65-70,6.DOI:10.13557/j.cnki.issn1002-2813.2025.06.013
滇中牛的体型外貌调查及其体尺、体重相关性分析
Investigation of body shape and appearance and correlation analysis between body size and body weight in Dianzhong cattle
摘要
Abstract
In this study,77 Dianzhong cattle(47 bulls and 30 cows)were selected to investigate their body shape and appearance,and 50 of them(20 bulls and 30 cows)were measured by body size and body weight.The results showed that bulls'body weight were positively extremely correlated with body height,waist height,chest circumference,abdominal circumference,circumference of cannon bone,and rump length(P＜0.01),and positively significantly correlated with body slanting length and chest depth(P＜0.05),with the maximum correlation coefficient was found for the waist height(0.840).The body weight of cows was positively extremely correlated(P＜0.01)with all 11 indices and the maximum correlation coefficient was for abdominal circumference(0.907).In terms of principal components,the first principal component reflected the overall structural development of Dianzhong cattle.The second principal component reflected the development of the carcass of Dianzhong bulls,and the second principal component of cows,reflecting the development of the hindquarters of the cows.The third principal component and the fourth principal component of bulls,reflecting the development of the hindquarters of the bulls,and the third and fourth principal components of cows reflected the development and meticulous uniformity of the carcasses.According to the constructed regression equations,the optimal regression equation for the body weight of bulls in Dianzhong cattle was:body weight=-1 137.568+7.246 × waist height+2.612 × chest circumference+13.560 × circumference of cannon bone(R2=0.893).And that of cows was:body weight=-522.86+1.734 × abdominal circumference+1.905 × chest circumference+13.602 × circumference of cannon bone(R2=0.898).The results showed that the experimental results reflected the body size characteristics of cattle in central Yunnan,and the regression equation established in the experiment could be used as the body size index to evaluate the body weight,which provided data reference for cattle breeding and livestock resource protection in central Yunnan.关键词
滇中牛/体型外貌/相关性分析/主成分分析/逐步回归分析Key words
Dianzhong cattle/body shape and appearance/correlation analysis/principal component analysis/stepwise regression analysis分类
农业科技引用本文复制引用
赵树生,和世春,吴东旺,刘艺端,王莉兴,亐开兴,李清,毛华明..滇中牛的体型外貌调查及其体尺、体重相关性分析[J].饲料研究,2025,48(6):65-70,6.基金项目
云南省农业基础研究联合专项(项目编号:202301BD070001-095) （项目编号:202301BD070001-095）
云南省鹤庆县奶牛产业科技特派团(项目编号:202204BI090005) （项目编号:202204BI090005）
楚雄州"兴楚科技领军人才"培养计划(项目编号:CXKJLJRC2023-07) （项目编号:CXKJLJRC2023-07）
