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- Title
Chemical composition, color, and tenderness of beef from Nellore and Nellore × Angus steers fed whole shelled corn diets.
- Authors
Rodrigues, A. C.; Ladeira, M. M.; Coelho, T. C.; Gionbelli, M. P.; Oliveira Júnior, J. M.; Moreira, G. M.
- Abstract
The objective was to evaluate quality of beef from Nellore and Nellore × Angus steers fed whole shelled corn (WSC) diets. Thirty-two steers with average BW of 353 kg were used in a completely randomized design using a 2 × 2 factorial arrangement (2 breeds and 2 diets). One diet containing 80% WSC and 20% of a commercial pellet based on soybean meal and minerals (15.1% CP and 2.84 Mcal/kg). The other diet had 74% WSC, 20% of the same proteic-mineral pellet, and 6% of sugarcane bagasse (14.7% CP and 2.75 Mcal/kg). Feeding period was 116 d, steers were fed individually and final BW was 431 and 463 kg for Nellore and crossbred steers (P < 0.05), respectively. Twenty-four hours after slaughter, samples were taken from the LM muscle of the left half carcass between 12th and 13th ribs for chemical composition analysis, color (L*, a*, and b*), cooking loss (CL), and shear force (SF). The statistical model included the effects of breed, diet, time, and their interactions. There was no effect (P > 0.05) of breed and diet on chemical composition, with mean values for moisture, CP, ether extract, and ash equal to 72.2, 22.88, 3.05, and 1.84%, respectively. There was no effect of diets on CL, SF and color indices (Table 373). However, there was a tendency (P < 0.10) of the beef from Nellore steers be less tender than Nellore × Angus steers, only 24 h after slaughter. Aging time increased tenderness and CL and reduced a* values. Beef from Nellore steers had lower CL. In conclusion, beef from Nellore are tougher than beef from Nellore × Angus steers after slaughter but similar after 14 d of aging. In addition, color, CL, and chemical composition of beef from Nellore and Nellore × Angus steers are similar.
- Subjects
BEEF; CORN as feed; BEEF cattle
- Publication
Journal of Animal Science, 2017, Vol 95, p184
- ISSN
0021-8812
- Publication type
Abstract
- DOI
10.2527/asasann.2017.373