The best regression equations of body weight on various body measurements are shown
in Table 2. Results of regressions of body weight on the linear, quadratic and cubic effects
of each body measurements are presented in Table 3.
Chest girth was statistically significant for all breeds (Table 2). The R2 value for Holstein
was obtained from the equation contained body length, wither height, chest depth and
chest girth was found 66.1 %. This result was lower than findings of TUZEMEN et al. (1995)
who reported R2=90.7 %. The R2 value obtained from the equation contained body
length, wither height and chest girth was found 66.1 % and this result was lower than
findings of SEKERDEN et al. (1991) (R2=97.7 %). R2 value was obtained from the equation
contained only chest girth (R2=60.7 %) was lower than those findings of SEKERDEN et al.
(1991) (R2=97.3 %) and TUZEMEN et al. (1995) (R2=86.7 %).
The highest R2 value for Brown Swiss were obtained from the equation contained all
body measurements (R2=92.2 %) (Table 2). R2 value was determined as 91.8 % which
contained body length, wither height, chest depth and chest girth. This result was in line