Data/hora: 04/06/2024 07:04:41

Provedor de dados: 	2	
País: 	Brazil	
Título: 	Genetic components of birth weight of texel sheep reared in extensive system	
Autores: 	Amarilho-Silveira, Fernando; Dionello, Nelson José Laurino; Mendonça, Gilson de; Motta, Jaqueline Freitas; Fernandes, Tiago Albandes; Silva, Nicholas da Silveira.	
Data: 	2017-12-27	
Ano: 	2017	
Palavras-chave: 	Zootecnia  Genética e Melhoramento dos Animais Domésticos maternal permanent environment; Heritability; Sheep breeding; Direct additive variance.	
Resumo: 	This study aimed to estimate the components of (co)variance, genetic and phenotypic parameters and trends for birth weight. We used 783 birth weight records, between 2012 to 2016, of Texel sheep reared in extensive system. The components of (co)variance and the genetic parameters were estimated using six different animal models, using the restricted maximum likelihood method (REML). The model that best fit the data was Model 3, with estimates of direct additive genetic variance of 0.004, maternal permanent environment variance of 0.164, heritability coefficient of 0.011 and phenotypic variation attributed to the maternal permanent environment of 0.394. For the genetic trend, we observed a genetic gain of 0.413% and for the phenotypic trend, a phenotypic gain of 0.159 kg, between 2012 and 2016 were found. Estimates of direct heritability and proportion of the phenotypic variance explained by the maternal permanent environment presented lower and higher values, respectively, in comparison to other studies. For trends, both genetic and phenotypic, there were gains in birth weight between 2012 and 2016. 	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36481

10.4025/actascianimsci.v40i0.36481	
Editor: 	Editora da Universidade Estadual de Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36481/pdf	
Formato: 	application/pdf	
Fonte: 	Acta Scientiarum. Animal Sciences; v. 40 (2018): Publicação Contínua; e36481

Acta Scientiarum. Animal Sciences; v. 40 (2018): Publicação Contínua; e36481

1807-8672

1806-2636	
Fonte: 	Direitos autorais 2017 Acta Scientiarum. Animal Sciences