Abstract
SUMMARY cm, HR: 130.5 cm; CG: 201.9 cm, SBL: 149.1 cm. REA, P8 and weight of round were 96.2 cm 2 , 0.70 cm and 133.5 kg, respectively. Correlations between LW and the different body measurements were: HW: r= 0.57 (P<0.001), HR: r= 0.55 (P<0.01), CG: r= 0.60 (P<0.001), SBL: r= 0.18. A very close correlation was revealed between LW and weight of round (r= 0.93, P<0.001). Stepwise regression analysis (backward method) was used to examine how the weight of round (y) is affected by LA (x1), HW (x2), HR (x3), CG (x4), SBL (x5), REA (x6) and P8 (x7). In the 1 st of the 7 models all parameters existed as independent variables, multiple correlation coefficient (R) was 0.70 (P<0.10, rsxy= 11.65 kg). In the 4 th model, LA, HW, CG and REA remained as independent variables, resulting an R value similar to that of the 1 st model (R= 0.69, P<0.01, rsxy= 10.88 kg). The last model contained only CG (R= 0.62, P<0.001, rsxy= 11.11 kg). It was confirmed that the weight of round was determined in 38 % only by CG. It seems to be worth combining some body measurements with LA and ultrasound REA results for in vivo estimation of round weight of fattening bulls.
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