硒都黑猪体重与体尺指标的通径分析及最优回归模型的建立  

Path Analysis and Optimum Regression Equation Between Body Size and Body Weight of Xidu-black Pigs

作　　者：李梓芃 董斌科[1] 孙华[1] 杨延林 梅书棋[1] 彭先文[1] LI Zipeng;DONG Binke;SUN Hua;YANG Yanlin;MEI Shuqi;PENG Xianwen(Hubei Key Laboratory of Animal Embryo and Molecular Breeding/Institute of Animal Science and Veterinary Medicine,Hubei Academy of Agricultural Sciences,Wuhan 430064,China;Jiangxia District Animal Disease Prevention and Control Center,Wuhan 432200,China)

机构地区：[1]湖北省农业科学院畜牧兽医研究所/动物胚胎工程及分子育种湖北省重点实验室,湖北武汉430064 [2]江夏区动物疫病预防控制中心,湖北武汉432200

出　　处：《养猪》2022年第1期63-67,共5页Swine Production

基　　金：国家生猪产业技术体系项目(CARS-36);湖北省重点研发计划项目(2020BBB132);湖北省农业科技创新中心创新团队项目(2019-620-000-001-18)。

摘　　要：为了探讨硒都黑猪体重与体尺指标的相关性,研究体尺指标对体重的直接和间接作用,构建体重与体尺的最优回归模型,试验选取190日龄硒都黑猪167头,测量体重(Y)与体高(X_(1))、体长(X_(2))、胸围(X_(3))、腹围(X_(4))、臀长(X_(5))、臀宽(X_(6))、臀围(X_(7))等各项体尺指标,并进行相关性分析、通径分析、逐步线性回归分析。结果表明,硒都黑猪公猪和母猪体重与各项体尺指标均呈极显著正相关(P<0.01),公猪体尺指标与体重相关系数最大是体长(r=0.846),母猪体尺指标与体重相关系数最大为胸围(r=0.739)。硒都黑猪公猪胸围、体长、臀围对体重直接作用较大,腹围、体高、臀长对体重间接作用较大;硒都黑猪母猪胸围、体长、臀围、体高、臀长对体重直接作用较大,腹围、臀宽、臀长、臀围对体重间接作用较大。公猪和母猪的最优回归方程分别为Y公=0.627 X_(2)+1.153 X_(3)+1.919 X_(7)-179.953,Y母=0.435X_(1)+0.425 X_(2)+0.91 X_(3)+1.289 X_(5)+1.302 X_(7)-172.412。在硒都黑猪培育过程中,公猪应注重胸围、体长、臀围的选择力度,母猪应注重胸围、体长、臀围、体高、臀长的选择力度,以达到最大限度提高体重的目的。In order to explore the correlation between body weight and body size indexes of Xidu-black pigs,clarify the direct and indirect effects of body size on body weight,construct the optimal regression model of body weight and body size.167 Xidu-black pigs aged 190 days were selected to measure their body weight(Y)and body height(X_(1)),body length(X_(2)),chest circumference(X_(3)),abdominal circumference(X_(4)),hip length(X_(5)),hip width(X_(6)),hip circumference(X_(7))for correlation analysis,path analysis and stepwise linear regression analysis.The results showed that there was a very significant positive correlation between body weight and body size of male and female pigs(P<0.01).The largest correlation coefficient between body size and body weight of male pigs was body length(r=0.846),and the largest correlation coefficient between body size and body weight of female pigs was chest circumference(r=0.739).The chest circumference,body length and hip circumference of Xidu-black boar had a greater direct effect on body weight,while the abdominal circumference,body height and hip length had a greater indirect effect on body weight;the chest circumference,body length,hip circumference,body height and hip length of Xidu-black sows have a greater direct effect on body weight,while the abdominal circumference,hip width,hip length and hip circumference have a greater indirect effect on body weight.The optimal regression equations of male and female were YM=0.627X_(2)+1.153X_(3)+1.919X_(7)-179.953,YF=0.435X_(1)+0.425X_(2)+0.91X_(3)+1.289X_(5)+1.302X_(7)-172.412.In the breeding process of Xidu-black pigs,boars should pay attention to the selection of chest circumference,body length and hip circumference,and sows should pay attention to the selection of chest circumference,body length,hip circumference,body height and hip length,so as to maximize their weight.

关 键 词：硒都黑猪 体重 体尺 相关性 通径分析 逐步线性回归分析 

分 类 号：S828.8[农业科学—畜牧学]