Genotype-environment interaction on milk yield of Holstein cows - DOI: 10.4025/actascianimsci.v30i2.4706

• Autor(a) principal: Falcão, Alencariano José da Silva
• Data de Publicação: 2008
• Outros Autores: Martins, Elias Nunes, Costa, Cláudio Napolis, Mazucheli, Josmar
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Animal Sciences (Online)
• Texto Completo: https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4706
• topic: Markov chain; correlation; variance components; heritability; cadeia de Markov; correlação; componentes de variância; herdabilidade.

The effects of sire-environment interaction on genetic evaluation were investigated by analyzing 108,702 records of milk yield (305ME) of Holstein cows from the states of Minas Gerais, São Paulo, Paraná, Santa Catarina and Rio Grande do Sul. A Multivariate animal model was applied to estimate of genetic variance and covariance components, using Gibbs sampling. The a posteriori means of genetic variance in Santa Catarina and Rio Grande do Sul were higher (p < 0.001) than estimates in others states, even though the estimates did not vary (p > 0.05) between these two states. Heritability estimates of states ranged from 0.24 to 0.38. Genetic correlations among states were low and ranged from 0.07 to 0.33. Spearman’s correlation among sire breeding values ranged from 0.73 to 0.86. These results suggest sire-environment interaction for 305ME in the states of Minas Gerais, São Paulo, Paraná and between the states of Santa Catarina and Rio Grande do Sul.