非遗传因素对新疆华西牛初生重和出生体尺性状的影响OA

To investigate the impact of non-genetic factors on the birth weight and body measurements in Xinjiang Huaxi cattle,this study employed a general linear model in R language to analyze the impact of four non-genetic factors(farm,year of birth,season of birth,and sex)on birth weight and body measure-ment traits in Huaxi Cattle.Genetic parameters of these traits were estimated using both single-trait and multiple-trait animal models.The results indicated that birth year had a highly significant effect on birth weight and abdominal circumference(P＜0.01),while season significantly influenced all body measure-ments(P＜0.05).The heritability estimates for birth weight,body height,hip cross height,body length,chest girth,abdominal circumference,and cannon circumference were 0.28,0.47,0.66,0.77,0.61,0.51,and 0.36,respectively.Birth weight and cannon circumference exhibited moderate heritability,while the other traits demonstrated high heritability.The highest genetic correlation was observed between body height and body length(0.99),while the highest phenotypic correlation was between body height and hip cross height(0.98).