Data/hora: 11/06/2024 16:40:48

Provedor de dados: | 86
País: | Brazil
Título: | Breeding objectives for a Nellore cattle rearing system
Autores: | Carvalho,Caio Victor Damasceno; Bittencourt,Thereza Cristina Calmon de.
Data: | 2015-09-01
Ano: | 2015
Palavras-chave: | Beef cattle; Bio-economic model; Economic value; Market fluctuation; Selection criteria.
Resumo: | Abstract:The objective of this work was to define the traits that should be included as breeding objectives for Nellore cattle, according to simulations with a bio-economic model for rearing systems. The economic values (EVs) of the traits were calculated as the differences between the profits due to an increased performance of 1% in each trait, with the others traits remaining constant. To determine the impact of each selection on the revenue system, two scenarios were simulated based on the traits being selected. In the first scenario, the adopted selection criteria were: weaning weight (WW), weaning rate (WR), yearling weight (YW), and mature cow weight (MCW). In the second scenario, the cumulative productivity (CP) of dams was used as an indirect evaluation of the performance of calves, with all the other traits included, except WW. In the first scenario, an EV of R$ 1.44 kg-1 was obtained for WW. In the second scenario, an EV of R$ 2.91 kg-1 was obtained for CP. The trait with the highest EV in both scenarios was WR, which enhanced the profits by R$ 3.21 for each 1% increased performance. The meat price paid to the producer is the factor with the greatest impact on the EVs of all examined traits.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000900814

Editor:

Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira

Relação: | 10.1590/S0100-204X2015000900010
Formato: | text/html
Fonte: | Pesquisa Agropecuária Brasileira  v.50 n.9 2015
Fonte: | info:eu-repo/semantics/openAccess