Estimation of genetic parameters for growth traits in Tabapuã cattle using a multi-trait model

Revista Brasileira de Zootecnia

Silva, Luiz Otávio Campos da²  Menezes, Gilberto Romeiro de Oliveira²  Torres, Robledo de Almeida¹  Torres Júnior, Roberto Augusto de Almeida²  Euclydes, Ricardo Frederico¹  Gondo, Andrea² 

[1] UFV, Viçosa, Brazil;Embrapa Gado de Corte, Campo Grande, Brazil

关键词: Bayesian;    beef cattle;    (co)variance components;    genetic evaluation;    selection    Introduction The current market trend is to work with animals with faster growth;    which spend less time on pastures or in feedlots;    shortening the production cycle which in turn allows for greater economic return;   

DOI  :  10.1590/S1516-35982013000800006

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

To provide information that can contribute to the genetic evaluation and selection in Tabapuã cattle, genetic parameters were estimated for growth traits using a multi-trait animal model. (Co)variance components were estimated by a Bayesian approach using the Gibbs Sampler. Moderate and similar responses to selection are expected when selecting for weights at the four ages evaluated, since the direct heritability estimates were similar and of average magnitude (0.18 to 0.19). The direct and maternal additive genetic correlations between all pairs of weights were higher than 0.70, indicating a high degree of association between the four traits. This suggests that using any of them as selection criteria will result in correlated response in the others and that multi-trait analysis are recommended for the genetic evaluation of growth traits in beef cattle for exploiting this association.

【 授权许可】

CC BY-NC