Resumen de TI 03. Yield grading beef carcasses from the Mideastern region of Venezuela
D. Mansutti, Octavio S. Calzadilla Amaya, Justo González O., Nelson Huerta Leidenz, Argenis Rodas Gonzalez
Analyses of variance of cut-out data (percentages of beef cuts, bone or trimmed fat) from 36 bulls were calculated to validate effectiveness of two grading criteria to segregate groups of carcasses with distinct commercial composition. Bull carcasses graded A (n = 13), B (n = 14) or C (n = 9) by the official carcass grade (OCG) and 2 (n = 5), 3 (n = 16) or 4 (n = 11) by the Yield Index (IRC). Only four out of the 19 individual carcass components under study were significantly affected by the OCG. Moreover, mean separation indicated a poor performance of OCG (AIRC4) but no differences were found between IRC 3 and IRC 4. To accomplish their objectives, revision of the present grading system should consider the use of a prediction equation to better segregate groups of beef carcasses by yield.
