The phenotype correlation between body size and body weight,the direct and indirect effect of body size on body weight of Henan's large-tail sheep were analyzed with SAS software,and the optimum regression equation was established subsequently.The results indicated that body weight and chest girth were the major body size factors affecting the body weight of Henan's large-tail sheep.Therefore,besides body weight selection,the body height and chest girth selection should be strengtheaed at the same time.
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