白萨福克羊体重与体尺指标的相关及回归分析  

Correlation and Regression Analysis of Body Weight and Body Sizes in White Suffolk Sheep

作　　者：王伟峰 Wang Weifeng(Sheep Project Office of World Bank Loan Comprehensive Livestock Development Project, Huining 730799, Gansu, Chin)

机构地区：[1]甘肃省会宁县世界银行贷款畜牧综合发展肉羊项目办公室,会宁730799

出　　处：《中国草食动物科学》2017年第5期14-17,共4页China Herbivore Science

摘　　要：采用SPSS 17.0对白萨福克羊的体重与体尺指标进行相关性分析、通径分析、逐步回归分析,并对其相关系数进行分解,得出了体重与体尺指标之间的最优回归方程。结果表明:体高(x_1)和管围(x_4)均对白萨福克羊体重影响不显著(P>0.05),其相关系数分别为0.382和0.525;胸围(x_3)和体斜长(x_2)对白萨福克羊的体重影响极显著(P<0.01),其相关系数分别为0.822和0.519;体高(x_1)、体斜长(x_2)和管围(x_4)主要是通过胸围(x_3)对体重产生间接作用,胸围(x_3)主要是通过体斜长(x_2)和管围(x_4)对体重产生间接作用;白萨福克羊体重与体尺指标之间的最优回归方程为y=-105.123+1.217x_3+0.619x_2,标准化后的方程为y=0.738x_3+0.186x_2(R^2=0.704,P<0.01)。The phenotypic correlations,path coefficients,direct and indirect correlations between the body weight and body sizes in White Suffolk sheep were analyzed by SPSS 17.0 software. Then the optimum regression equation between the body weight and body sizes was established. The results indicated that the body height（x1）,cannon- bone circumference（x4）did not show significant correlation with the body weight at the 0.05 level and the phenotypic correlation were 0.382 and 0.525,respectively. The chest circumference（x3）and body length（x2）showed significant correlations with the body weight at the 0.01 level and the phenotypic correlation coefficient were 0.822 and 0.519,respectively. The body height,body length and cannon bone circumference had indirect influence by chest circumference mainly. The chest circumference had indirect influence by body length and cannon bone circumference. The optimum regression equation between the body weight and body size in White Suffolk sheep was：y=-105.123＋1.217x3＋0.619x2,and the normalized form of it was：y=0.738x3＋0.186x2（R2=0.704,P＆lt;0.01）.

关 键 词：白萨福克羊 体重 相关性分析 通径分析 回归模型 

分 类 号：S826.2[农业科学—畜牧学]