畜牧兽医学报2023，Vol.54Issue(12)：5301-5311,11.DOI:10.11843/j.issn.0366-6964.2023.12.038
萨能奶山羊体尺性状的多元逐步回归分析与生长曲线拟合
Multiple Stepwise Regression Analysis and Growth Curve Fitting of Body Measurement Traits in Saanen Dairy Goats
摘要
Abstract
This study aimed to conduct multiple stepwise regression and growth curve fitting anal-ysis on the body measurement traits of Saanen dairy goats,explore the correlation and regression relationship between different body measurements,construct a growth curve for body measure-ment traits,so as to provide a theoretical basis for revealing the development patterns of Saanen dairy goats on body measurement,and provide practical reference for the selection and manage-ment of standardized farm of dairy goats.A total of 874 healthy Saanen dairy goats from different age of months and genders were used as the research subjects,and 11 body measurement traits were measured,including 4 general body measurement traits:body height,body length,chest circumference,and tube circumference;Three traits reflecting the reproductive performance of bucks:rump length,rump width,and testicular circumference;Four udder traits including ud-der circumference,udder depth,teat spacing,and udder height from the ground.Principal com-ponent analysis was applied to reduce the dimensions of the above three types of traits,and mul-tiple stepwise regression was used to construct a regression equation for general body measure-ment traits reflecting reproductive performance traits of bucks and udder traits of does.The Ber-talanffy model was used to fit the growth curve of general body measurement traits.The results indicated that:1)There was a highly significant correlation(P＜0.01)within the three types of traits,and the first principal component after dimensionality reduction represented the overall ap-pearance factor among the three types of traits.The second principal component in does udder traits can be explained as a factor related to hindquarters height.2)The regression fit of general body measurement traits to traits reflected buck reproductive performance was relatively high,ranging from 0.76 to 0.87,while the regression fit of udder traits of does was only 0.15 to 0.40.3)Bertalanffy had a good fitting effect on general body measurement traits,except for a fitting degree of 0.60 for does tube circumference,all other traits were above 0.75,and the growth curves of bucks'body measurement rose faster than that of does.In conclusion,there is a corre-lation between the body measurement traits of Saanen dairy goats,and the general body measure-ment traits of bucks can accurately predict the traits that reflected buck reproductive perform-ance.The Bertalanffy model is good to fit the general body measurement traits in dairy goats.关键词
萨能奶山羊/体尺性状/回归分析/主成分分析/生长曲线Key words
Saanen dairy goat/body type trait/regression analysis/principal component analy-sis/growth curve分类
农业科技引用本文复制引用
何志成,秦晓晨,吕永强,李秀金,边会龙,罗军,李聪..萨能奶山羊体尺性状的多元逐步回归分析与生长曲线拟合[J].畜牧兽医学报,2023,54(12):5301-5311,11.基金项目
国家重点研发计划项目(2022YFD1300203) （2022YFD1300203）
陕西省畜禽育种"两链"融合重点专项(2022GD-TSLD-46-0201) （2022GD-TSLD-46-0201）
