滇东南水牛体重与体尺指标的相关及回归分析  

Correlation and regression analysis on body weight and body size indicators of Dian Dongnan buffalo

作　　者：李昆倍 王梓蓓 赵树生 戴思凡 孙丽琼 和世春 李清[1,2] 毛华明[1,2] LI Kunbei;WANG Zibei;ZHAO Shusheng;DAI Sifan;SUN Liqiong;HE Shichun;LI Qing;MAO Huaming

机构地区：[1]云南农业大学动物科学技术学院,云南昆明650000 [2]云南省动物营养与饲料重点实验室,云南昆明650201

出　　处：《饲料研究》2025年第2期121-126,共6页Feed Research

基　　金：云南省鹤庆县奶牛产业科技特派团(项目编号:202204BI090005)。

摘　　要：试验旨在研究滇东南水牛体重与体尺指标的相关及回归分析。选取31头成年滇东南水牛公牛,对其外貌特征进行记录,体尺、体重进行测量,并建立体重的逐步回归方程。结果显示,滇东南水牛公牛体重与鬐甲高、十字部高、体斜长、胸围、腹围、管围、胸宽、坐骨端宽、胸深、尻长、坐骨结节高、腰角宽、蹄踵深度均呈极显著相关(P<0.01),与尻角度呈显著相关(P<0.05),其中胸围的相关系数最大(0.951)。根据主成分分析,第一主成分为体型外貌因子,第二主成分为尻角度因子。通过逐步回归分析,构建最优回归方程:体重=-830.501+1.733×胸围+7.260×尻长+6.124×坐骨端宽+4.195×腰角宽+1.420×腹围。研究表明,滇东南水牛公牛的体重和尻角度变异幅度较大,选育潜力最佳。研究表明,该方法通过筛选滇东南水牛公牛的关键体尺指标,为建立保种场之后的选育工作以及滇东南水牛后期与引入水牛品种的杂交提供理论基础。The study aims to investigate the correlation and regression analysis between body weight and body size indicators in Dian Dongnan buffalo.A total of 31 adult male Dian Dongnan buffaloes were selected,and their external characteristics were recorded,while their body size indicators and body weight were measured.A stepwise regression equation for body weight was established.The results showed that the body weight of Dian Dongnan buffalo was extremely correlated with withers height,rump height,body length,chest circumference,abdominal circumference,cannon circumference,chest width,ischial width,chest depth,rump length,ischial tuberosity height,hip width,and heel depth(P<0.01),and significantly correlated with rump angle(P<0.05).Among these,the correlation coefficient with chest circumference was the highest(0.951).Principal component analysis indicated that the first principal component was the body type factor,and the second principal component was the rump angle factor.Through stepwise regression analysis,the optimal regression equation was constructed:Body weight=-830.501+1.733×chest circumference+7.260×rump length+6.124×ischial width+4.195×hip width+1.420×abdominal circumference.The study indicates that the body weight and rump angle of Dian Dongnan buffalo have the greatest variation range and the best breeding potential.This method,by screening key body size indicators of Dian Dongnan buffalo,provides a theoretical basis for breeding work after the establishment of conservation farms and for future crossbreeding between Dian Dongnan buffalo and introduced buffalo breeds.

关 键 词：滇东南水牛 体型外貌 体尺指标 主成分分析 逐步回归分析 

分 类 号：S823[农业科学—畜牧学]