基于柯坪县样本的新疆南疆哺乳期湖羊母羔体重与体尺指标相关性分析OACHSSCD

This study aims to clarify the pre-weaning growth and development patterns of suckling female Hu sheep lambs in Southern Xinjiang,providing data support for scientific breeding,precision selection and production optimization of Hu sheep.A total of 65 healthy suckling female Hu sheep lambs(within 45 days old)from Keping county in this region were selected as research subjects.By accurately measuring body weight(y)and four body size indicators-chest girth(x1),body height(x2),body length(x3),and can-non circumference(x4),the correlation mechanisms among these indicators were analyzed using correlation,path and multiple regres-sion analyses.The results indicated that:1)The body weight of female lambs was extremely significantly positively correlated with all body size indicators(P<0.01),with the correlation coefficients ranked as follows:body length(r3=0.931)>body height(r2=0.855)>chest girth(r1=0.773)>cannon circumference(r4=0.568).2)Path analysis revealed that body length had the strongest direct effect on body weight(direct path coefficient=0.662),while cannon circumference mainly exerted a significant indirect effect on body weight through body length(indirect path coefficient=0.387).3)Through multiple stepwise regression screening,cannon circumference which exhibited an insignificant regression coefficient(P>0.05)was xcluded,leading to the establishment of the opti-mal linear regression equation:y=-26.472+0.661x1+0.205x2+0.127x3(R2=0.89,P<0.01).In conclusion,chest girth,body height,body length and cannon circumference can all serve as evaluation indicators for the growth and development of female Hu sheep lambs,with body length identified as the core indicator for predicting their growth status,thereby providing a crucial basis for the early selection and breeding of Hu sheep in Keping county,Southern Xinjiang region,as well as in regions with similar ecological conditions.