Effects of percentage Brahman and Angus breeding, age-season of feeding and slaughter end point on feedlot performance and carcass characteristics.

摘要: Steers (n = 165) of known percentage Brahman (B) and Angus (A) breeding were used to study effects breed group (A, 3/4A:1/4B, 1/2A:1/2B, 1/4A:3/4B), age-season feeding (calves fed during the cool season vs yearlings warm season) slaughter end point (less than .90, 1.0 1.15, 1.27 1.40, greater or equal 1.5 cm adjusted fat over ribeye) on feedlot performance carcass characteristics. The 1/2B 3/4B steers had heavier (P less .05) initial final weights A 1/4B higher unshrunk ADG did. Breed types did not differ for feed efficiency. Yearling in calves season, but calculated an empty-rumen basis between two age-seasons feeding. Calves more efficient when efficiency was expressed basis; however, a live weight there no difference No by interactions detected. Slaughter significantly affect basis. smaller ribeye areas (REA) per 100 kg hot lower marbling scores steers. Yearlings produced carcasses season. As s.c. thickness at increased, numerical yield grade whereas REA decreased. Marbling also increased as fatness up about subcutaneous fat.