Estimação de parâmetros genéticos de ovinos da raça Santa Inês utilizando modelos uni e bicaracterística

• Autor(a) principal: Carvalho, Geane Conceição
• Data de Publicação: 2014
• Outros Autores: Barbosa, Leandro Teixeira, Oliveira, Tatiana Maia de, Fonseca, Fernanda Érica Pereira, Muniz, Evandro Neves, Azevedo, Hymerson Costa
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFS
• Texto Completo: http://ri.ufs.br/jspui/handle/riufs/8497
• topic: Correlação genética; Efeito materno; Herdabilidade; Modelo animal; Ovinos deslanados; Genetic correlation; Maternal effect; Heritability; Animal model; Hair sheep

The objective of this study is to estimate genetic parameters for growth traits in sheep Santa Ines breed by Restricted Maximum Likelihood (REML). The (co)variance components and genetic parameters were estimated by MTDFREML Software (Multiple Trait Derivative-Free Restricted Maximum Likelihood). The characteristics evaluated in single and two-trait models were: birth weight (BW) and weaning weight (WW). In addition to the fixed effects of sex, contemporary group and parity type, we used the following random effects: direct genetic effect, maternal additive genetic and residual effects. The direct additive heritability estimates for BW were 0.20 and 0.21 for single and two-trait models, respectively. Heritability estimates for direct additive WW were 0.04 and 0.07 for single and two-trait models, respectively. The genetic correlation between BW and WW was 0.11, indicating that both traits should be worked on simultaneously.