摘要
[目的]探究萨杜蒙三元杂交黑绵羊的体重与其体尺指标间的关联性,构建黑绵羊最优的体重-体尺指标回归模型。[方法]选取60只8月龄萨杜蒙三元杂交黑绵羊公羊为研究对象,测定其胸围、体高、体长、体斜长和体重,并运用SPSS 26.0统计学软件对所收集数据进行相关性分析、回归分析和通径分析,进而建立回归方程。[结果]萨杜蒙三元杂交黑绵羊体重与各体尺指标均呈极显著(P<0.01)正相关,其中胸围与体重的相关系数最大,为0.755。通径分析发现,胸围、体高与体斜长3个体尺指标是影响体重的重要变量,并通过体斜长对体重产生间接作用。萨杜蒙三元杂交黑绵羊体重与体尺指标的最优回归方程为y=0.971x_(胸围)+0.629x_(体高)+0.505x_(体斜长)-127.019,标准化后的回归方程为y=0.644x_(胸围)+0.333x_(体高)+0.335x_(体斜长)(R^(2)=0.761,P<0.01)。[结论 ]萨杜蒙三元杂交黑绵羊的体重与各体尺指标存在极显著(P<0.01)正相关关系,其胸围、体高和体斜长对体重有直接影响,在选育过程中,通过优化这些指标可以有效预测和增加其体重。
[Objective]To explore the correlation between body weight and body size indexes of Sadumun ternary crossbred black sheep,and to construct an optimal regression model of body weight-body size indexes for black sheep.[Methods]Sixty 8-month-old Sadumun ternary crossbred black sheep rams were selected for the study,and their chest circumference,body height,body length,body slant length and body weight were determined.The statistical software of SPSS 26.0 was used to carry out correlation analysis,regression analysis and path analysis of the collected data,and then to establish the regression equations.[Results]There was a highly significant(P<0.01)positive correlation between body weight and body size indexes of Sadumun ternary crossbred black sheep,and the correlation coefficient between chest circumference and body weight was the largest,which was 0.755.Path analysis showed that chest circumference,body height and body slanting length were important variables affecting body weight,and had an indirect effect on body weight through body slanting length.The optimal regression equation of body weight and body size index of Sadumun ternary crossbred black sheep was y=0.971xchest circumference+0.629xbody height+0.505xbody slant length-127.019,and the standardized regression equation was y=0.644xchest circumference+0.333xbody height+0.335xbody slope length(R2=0.761,P<0.01).[Conclusion]There was a highly significant(P<0.01)positive correlation between body weight and body size indexes of Sadumun ternary crossbred black sheep.The chest circumference,body height and body slant length had a direct impact on body weight.In the process of breeding,the body weight of sheep could be effectively predicted and increased by optimizing these indexes.
作者
吴方向
谢遇春
陈大勇
杨思源
何辉杰
王泳
张耀支
刘洁
冯军平
马驰
尹雪姣
李长青
WU Fangxiang;XIE Yuchun;CHEN Dayong;YANG Siyuan;HE Huijie;WANG Yong;ZHANG Yaozhi;LIU Jie;FENG Junping;MA Chi;YIN Xuejiao;LI Changqing(Inner Mongolia Sino Sheep Technology Co.,Ltd.,Jining 012000,China;Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;Key Laboratory of Healthy Breeding of Grass-fed Livestock and Livestock Product Quality Regulation,Ministry of Agriculture and Rural Affairs,Hohhot 010031,China;Hebei Normal University of Science and Technology,Qinhuangdao 066000,China;Key Laboratory of Characteristic Animal Germplasm Resources Development and Innovation,Qinhuangdao 066600,China;Tangshan Agricultural Comprehensive Administrative Law Enforcement Detachment,Tangshan 063000,China)
出处
《畜牧与饲料科学》
2025年第3期88-93,共6页
Animal Husbandry and Feed Science
基金
国家2030重大项目(2022ZD040130202)
国家肉羊产业技术体系(CARS-38)
河北科技师范学院博士启动基金项目(2022YB032)
河北科技师范学院高校基本科研业务费专项项目(2023JK06)
河北省高等学校科学技术研究项目(QN2022165)。
关键词
萨杜蒙三元杂交黑绵羊
体重
体尺指标
相关性分析
回归分析
Sadumun ternary crossbred black sheep
body weight
body size
correlation analysis
regression analysis
