【摘要】 为了研究豫东肉用山羊母羊体尺性状与体重间的相关性，建立体重与体尺性状之间的最优回归方程，为豫东肉用山羊母羊遗传参数选择和品种选育提供理论依据，试验采用横交固定四代阶段第四世代群体的豫东肉用山羊母羊348只为研究对象，测定体长（X₁）、体高（X₂）、胸围（X₃）、管围（X₄）、体重（Y）数据，利用逐步回归法建立豫东肉用山羊母羊体尺性状与体重间的多元线性回归方程，并运用相关分析和通径分析体尺性状与体重间的相关性。结果表明：6月龄的体重、12月龄的体高和24月龄的管围变异系数最大，分别为9.19%、85.95%和7.28%;体尺性状中变异系数最小的是6月龄、12月龄和24月龄的胸围，分别为3.93%、2.37%和2.73%,12月龄的体高为中等变异，其余均为弱变异。6月龄各体尺性状与体重均呈极显著正相关（P<0.01）,其中胸围和体长对体重的相关系数较大，分别为0.738和0.548;12月龄体长、胸围与体重呈显著或极显著正相关（P<0.05或P<0.01）,相关系数分别为0.235和0.380;24月龄胸围与体重呈极显著正相关（P<0.01）,相关系数为0.524。6月龄、12月龄和24月龄体重与体尺性状的多元线性回归方程分别为Y=-63.867+0.503X₁+0.867X₃（R²=0.990）、Y=-95.615+0.660X₁+1.133X₃（R²=0.957）和Y=-126.805+0.805X₁+1.359X₃（R²=0.985）,各年龄段豫东肉用山羊母羊的胸围与体重有较强的直接作用和间接作用，体长次之。说明在豫东肉用山羊的选育过程中，胸围是影响豫东肉用山羊母羊体重最重要的体尺性状，可作为豫东肉用山羊母羊体重选育的选择指标。更多还原

【Abstract】 In order to explore the correlation between body size traits and body weight in ewes of meat goats in eastern Henan Province, an optimal regression equation was established between body weight and body size traits, providing a theoretical basis for genetic parameter selection and breed breeding in ewes of meat goats in eastern Henan. A total of 348 female meat goats from the fourth generation population in eastern Henan Province were used in the experiment, and their body length（X₁）, body height（X₂）, chest circumference（X₃）, tube circumference（X₄）, and body weight（Y） were measured. The multiple linear regression equation between body size traits and body weight of female meat goats in eastern Henan Province was established by the stepwise regression method, and the correlation between body size traits and body weight was explored by correlation analysis and path analysis. The results showed that the indicators with the larger coefficient of variation were body weight at 6 months old, body height at 12 months old and cannon circumference at 24 months old, which were 9.19%, 85.95% and 7.28%, respectively. The indicators with the smallest coefficient of variation in body size traits were chest circumference at 6 months old, 12 months old and 24 months old, which were 3.93%, 2.37% and 2.73%, respectively. The body height at 12 months old was moderate variation, while the rest were weak variation. There was a significant positive correlation between body size traits and body weight at 6 months of age（P<0.01）. The correlation coefficients of chest circumference and body length to body weight were 0.738 and 0.548, respectively. There was a significant or extremely significant positive correlation between body length and chest circumference and body weight at 12 months of age（P<0.05 or P<0.01）, and the correlation coefficients were 0.235 and 0.380, respectively. There was a significant positive correlation between chest circumference and body weight at 24 months of age（P<0.01）, and the correlation coefficient was 0.524. The multiple linear regression equations for weight and body size traits at 6 months, 12 months, and 24 months of age were Y=-63.867+0.503X₁+0.867X₃（R²=0.990）, Y=-95.615+0.660X₁+1.133X₃（R²=0.957）; Y=-126.805+0.805X₁+1.359X₃（R²=0.985）,respectively. The chest circumference and body weight of female meat goats in eastern Henan Province had strong direct and indirect effects, followed by body length. The results indicated that in the breeding process of meat goats in eastern Henan, chest circumference was the most important body size trait that affected the weight of the ewes; chest circumference could be used as a selection indicator for the weight of female meat goats in eastern Henan.更多还原