Data/hora: 01/06/2024 00:55:57

Provedor de dados: | 96
País: | Brazil
Título: | Genetic parameters and alternatives for evaluation and ranking of Nellore young bulls in pasture performance tests
Autores: | Fragomeni,Breno de Oliveira; Scalez,Daiane Cristina Becker; Toral,Fábio Luiz Buranelo; Bergmann,José Aurélio Garcia; Pereira,Idalmo Garcia; Costa,Paula Souza Teixeira da.
Data: | 2013-08-01
Ano: | 2013
Palavras-chave: | Breeding value; Heritability; Least square; Mixed models; Selection.
Resumo: | The objective of this study was to estimate (co)variance components for weight at 550 days, average daily gain and an index with both traits, and to compare alternatives for evaluation and ranking of Nellore young bulls in pasture performance tests. The heritability estimates were 0.73, 0.31 and 0.44 for weight at 550 days, average daily gain and index, respectively. Animals were ranked according to their predicted breeding values or the phenotypic deviations in relation to the mean of the test. Although the correlations between breeding values and phenotypic deviations were high, there were differences in the number of animals selected in common when the selection criteria were the predicted breeding values or the phenotypic deviations. Mixed models are more appropriate than the least squares method and should be utilized in the evaluation of young bulls in performance tests.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800004
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982013000800004
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.42 n.8 2013
Fonte: | info:eu-repo/semantics/openAccess