Feedlot performance, feed efficiency and carcass traits in Nellore cattle selected for postweaning weight
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
---|---|
Data(s) |
30/09/2013
20/05/2014
30/09/2013
20/05/2014
01/02/2013
|
Resumo |
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objective of this study was to evaluate the correlated responses to selection for growth in feed efficiency and carcass traits of Nellore animals. A total of 121 animals of the Nellore control (NeC) and selection herds were subjected to performance testing and classified regarding residual feed intake (RFI). Sixty-seven of these animals were selected and finished until reaching 4 mm of subcutaneous fat thickness between the 12th and 13th ribs. The animals were slaughtered at a mean age of 541 days and mean live weight of 423 kg for NeS and of 363 kg for NeC, and carcass traits were measured. Animals in NeS presented higher initial and slaughter weights, dry matter intake, hot and cold carcass weight, weight of retail cuts, and carcass yield than NeC animals for the same slaughter age and feedlot time. No significant differences in RFI were observed between herds, showing that the weight gain from selection for growth did not cause changes in the energy efficiency of the animals. |
Formato |
125-129 |
Identificador |
http://dx.doi.org/10.1590/S1516-35982013000200007 Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 42, n. 2, p. 125-129, 2013. 1516-3598 http://hdl.handle.net/11449/14192 10.1590/S1516-35982013000200007 S1516-35982013000200007 WOS:000316123300007 S1516-35982013000200007.pdf |
Idioma(s) |
eng |
Publicador |
Sociedade Brasileira de Zootecnia |
Relação |
Revista Brasileira de Zootecnia |
Direitos |
openAccess |
Palavras-Chave | #beef cattle #carcass yield #meat cuts #selection |
Tipo |
info:eu-repo/semantics/article |