Effect of post-weaning growth rate on carcass traits and meat quality of Nellore cattle.

Autor: Silva LHP; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil. Electronic address: luiz.h.silva@ufv.br., Paulino PVR; Cargill Animal Nutrition/Nutron, Campinas, São Paulo, Brazil., Assis GJF; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Assis DEF; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Estrada MM; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Silva MC; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Silva JC; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Martins TS; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Valadares Filho SC; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Paulino MF; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Chizzotti ML; Department of Animal Science, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
Jazyk: angličtina
Zdroj: Meat science [Meat Sci] 2017 Jan; Vol. 123, pp. 192-197. Date of Electronic Publication: 2016 Oct 12.
DOI: 10.1016/j.meatsci.2016.10.005
Abstrakt: This study evaluated the effects of growth rate during post-weaning growing phase on carcass traits and beef quality. Thirty-four Nellore young bulls were randomly assigned to one of three treatments: LOW, MEDIUM or HIGH growth rate during post-weaning growing phase followed by high growth rate in the finishing phase. The growth rate affected (P<0.05) all carcass traits evaluated at the end of post-weaning growing phase, except ultimate pH. Carcass dressing was greatest (P<0.05) for the HIGH growth rate group in both phases. Beef from the HIGH group exhibited the greatest (P<0.05) sarcomere length and a* and b* colour values at the end of post-weaning growing phase. However, post-weaning growth rate did not affected (P>0.05) collagen content and solubility, myofibrillar fragmentation index and Warner-Bratzler shear force. Our data suggest that a low post-weaning growth rate produces lighter and leaner carcasses, but it does not affect meat quality traits in Nellore young bulls.
(Copyright © 2016 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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