Características da carne de novilhas de diferentes grupos genéticos em confinamento

Abstract

Meat characteristics of ½ Guzerá x ¼ Simmental x ¼ Nellore (GG1); ½ Guzerá x ¼ Limousin x ¼ Nellore (GG2) and ½ Guzerá x ¼ Simbrasil x ¼ Nellore (GG3) heifers were evaluated. Each experimental group was constituted by eight animals. The females were finished in feedlot and presented respective average weights to GG1; GG2 and GG3 of 379,33 ± 13.65; 378.00 ± 11.53 kg and 382.83 ± 9.25 kg at the feedlot beginning and 446.00 ± 10.07 kg; 441.00 ± 10.54 kg e 449.00 ± 11.53 kg in the slaughter occasion. The heifers consumed a diet with 12.5% of crude protein and 73.5% of total digestible nutrients (TDN). The roughage was constituted by millet grass and the concentrate by sorghum. cottonseed. limestone and sugar cane residue. There was no significant difference (P>0.05) to the percentages of damp (74.12; 75.12% and 75.65%). ether extract (1.98; 2.30% e 2.22%). crude protein (23.19; 22.15% and 22.29%)). defrosting loss (6.54; 5.89% and 6.03%). as well as to the averages obtained to coloration (4.38; 4.50 and 4.38). texture (4.63; 4.50 e 4.38). firmness (4.38 and 4.63). taste (8.38 and 8.63). juiciness (8.63; 8.50 and 8.38) and tenderness (8.25 and 7.75) evaluated by panel method. . The meat from GG2 and GG3 animals. presented major losses on coction (25.92% and 27.46% vs 21.95%) and superior mineral contents (4.31% e 4.40% vs 3.87%) in relation to GG1. Considering the experimental conditions and the evaluated genetic groups. it was concluded that ½ Guzerá x ¼ Limousin x ¼ Nellore. and ½ Guzerá x ¼ Simbrasil x ¼ Nellore heifers present similar meat quality observed by the homogeneity existent between the groups to the evaluated characteristics. The taurine genotype until 25% does not promote differences in meat sensorial items and losses by defrosting. except to minor losses on coction and mineral contents influence by the Simmental genotype.