Correlation Analysis between Body Weight and Main Body Size Indexes of 12-month-old Shorthorn Cattle
The purpose of this paper is to explore the correlation between body weight and main body size inde-xes of 12-month-old Shorthorn cattle,as well as to construct a multiple regression equation to study the main body size indexes and age of Shorthorn cattle.A total of 163 bulls and 261 cows at 12 months of age were selected,and a total of 424 Shorthorn cattle were selected for body size data including body weight,body height,cross height,body oblique length,and chest circumference.The least square method was used to perform the best linear fitting of the known data,and the multiple regression equation was constructed and its correlation was analyzed.The results showed that the average body weight and body size indexes of 12-month-old bulls were higher than those of cows.The regression relationship between body weight and each body size index reached a very significant level(P＜0.01),and the multiple linear regression equation had a high degree of fitting.There were different de-grees of correlation between body weight and body size indexes of 12-month-old Shorthorn cattle,regardless of sex.The correlation between body height,cross height,body oblique length,chest circumference,and body weight of bulls was higher than that of cows.The body weight of 12-month-old Shorthorn bulls was significantly positively correlated with body height,cross height,body length,and chest circumference(P＜0.01).The corre-lation between body weight and chest circumference was the highest(r=0.902).The body weight of 12-month-old Shorthorn cows was significantly positively correlated with body height,cross height,body length,and chest circumference(P＜0.01),and the correlation with chest circumference was the largest(r=0.823).The body weight of 12-month-old Shorthorn cattle was significantly positively correlated with body height,cross height,body length,and chest circumference(P＜0.01),and the correlation with chest circumference was the largest(r=0.873).
Shorthorn cattleweightmain body size indicatorsmultiple linear regression equationpath a-nalysis
NETL
NSTL
万方数据
