Simulação do ganho em produtividade e associação entre características de crescimento e reprodutivas em um rebanho Nelore submetido à seleção

Resumo

The aim of this study was, using a simulation model, to verify the result of twenty years of selection for maternal ability and growth in productivity and potential impacts on reproductive characteristics in a selection Nellore herd raised in the savannah biome. Data were reported to the DECI (Decision Evaluator for the Industry Cattle) simulation model reflecting the real situation of registered purebred Nellore herd of the Embrapa Cerrados (Nellore BRGN). The simulation model DECI was effective to predict the response to genetic selection for high growth rate and maternal ability, signaling direct improvement of economical characteristics, increasing pre-weaning weight gain and adjusted weight at 205 days and milk production. The slight decrease of females body condition and increase of maturity weight did not influence negatively the reproductive performance. Under the simulated conditions, the adoption of the management techniques resulted from the simulation may increase the productive rates of the Nellore Embrapa Cerrados herd without decrease performance on reproductive traits.

Descrição

Palavras-chave

Cerrado, Habilidade materna, Nelore, Produção animal, Savanna, Maternal ability, Nellore bred, Animal production

Citação

PAULA, Edson Júnior Heitor de et al. Simulação do ganho em produtividade e associação entre características de crescimento e reprodutivas em um rebanho Nelore submetido à seleção. Pubvet, Londrina, v. 6, n. 30, p. 1 -24, 2012.