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Tropical sire breed comparisons for birth to slaughter growth, carcass composition, and sensory characteristics as influenced by stocker grazing environment
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A two year study was conduced at the Texas e Micrographics. Agricultural Experiment Station at Overtone Texas to evaluate the use of the tropically adapted breed, Tuli. Data were compiled from Simmental X (Brahman X Hereford) (SIMXr), Angus X Brahman (AXR), Tuli X Brahman (TM), and Brahman X Brahman (BM) steers born in 1993 and 1994 to ascertain the influence of breed, year, and stocker grazing location on predefining, postweaning, carcass, and sensory traits. Steers were paired within breed type by weight and randomly assigned to winter pasture at Overtone TX or E1 Reno, OK. Analyses of variance were conducted utilizing Harvey's Mixed Model Least Squares and Maximum Likelihood Computer Program. Year and breed embeds (P < .05) were found for birth weight (BW), 205-d adjusted weaning weight, preceding average daily gain IPADGI, beginning winter weight (B , ending winter weight (E , and winter ADG (WADG). SIG beers had heavier BW, WW, PADG, BWW, EWW, and WADG than all others. TXB calves had lighter BW and heavier EWW and WADG than BXB calves. AXB steers had heavier WW, BWW, EWW, Feater PADG, and greater WADG than TXH and BXH steers. Stocker Fazing location contributed to the variability for PADG, EWW, and WADG (P < .05). Age as a covariate was significant for BWW and EWW (P < .001). Year and breed embeds (P < .05) were found for hot carcass weight (HCW), rib eye area (REAI, percentage kidney, pelvic, and heart fat (U11), fat thickness (FAT), yield made (YG), marbling score ), shear force (SF), and juiciness (JUICE) and tenderness (TENDER) by taste panels. SIMX steers had heavier HCW, larger KEN lower SF, higher JUICE, and higher TENDER than all others. AXB steers had heavier HCW, larger REA Neater FAT, higher YG, and Neater MARB than TX'R and BXB. TM steers had larger REA. greater FAT, greater MA118, lower SF, higher JUICE, and higher TENDER than B'XR steers. Stocker Fang location contributed to the variability for HCW, KPH, and JUICE (11 < .05). Overall, TXB steers had lower BW, higher MARB, lower SF, higher MCE, and higher TENDER than BXB steers while maintaining similar growth patterns.
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Includes bibliographical references (leaves 63-67).
Brockett, Jacqueline Renee (1998). Tropical sire breed comparisons for birth to slaughter growth, carcass composition, and sensory characteristics as influenced by stocker grazing environment. Master's thesis, Texas A&M University. Available electronically from
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