Data/hora: 10/06/2024 14:09:23

Provedor de dados: | 74
País: | Brazil
Título: | Bayesian inference in genetic parameter estimation of visual scores in Nellore beef-cattle
Autores: | Faria,Carina Ubirajara de; Koury Filho,William; Magnabosco,Cláudio Ulhôa; Albuquerque,Lúcia Galvão de; Bezerra,Luiz Antônio Framartino; Lôbo,Raysildo Barbosa.
Data: | 2009-01-01
Ano: | 2009
Palavras-chave: | Morphological traits; Threshold model; Genetic parameters; Nellore.
Resumo: | The aim of this study was to estimate the components of variance and genetic parameters for the visual scores which constitute the Morphological Evaluation System (MES), such as body structure (S), precocity (P) and musculature (M) in Nellore beef-cattle at the weaning and yearling stages, by using threshold Bayesian models. The information used for this was gleaned from visual scores of 5,407 animals evaluated at the weaning and 2,649 at the yearling stages. The genetic parameters for visual score traits were estimated through two-trait analysis, using the threshold animal model, with Bayesian statistics methodology and MTGSAM (Multiple Trait Gibbs Sampler for Animal Models) threshold software. Heritability estimates for S, P and M were 0.68, 0.65 and 0.62 (at weaning) and 0.44, 0.38 and 0.32 (at the yearling stage), respectively. Heritability estimates for S, P and M were found to be high, and so it is expected that these traits should respond favorably to direct selection. The visual scores evaluated at the weaning and yearling stages might be used in the composition of new selection indexes, as they presented sufficient genetic variability to promote genetic progress in such morphological traits.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400015
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572009005000066
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.32 n.4 2009
Fonte: | info:eu-repo/semantics/openAccess