Data/hora: 12/06/2024 14:19:32

Provedor de dados: 	2	
País: 	Brazil	
Título: 	Heterogeneous genetic (co)variances in simulated closed herds under selection - 10.4025/actascianimsci.v34i1.10934	
Autores: 	Lino-Lourenço, Daniela Andressa; UEM; Oliveira, Carlos Antonio Lopes de; UEM; Martins, Elias Nunes; UEM; Leite, Meiby Carneiro de Paula; UFRB; Maia, Fabiana Martins Costa; UEM; Santos, Alexandra Inês dos; UEM.	
Data: 	2011-11-01	
Ano: 	2011	
Palavras-chave: 	Genética; Melhoramento; Animais Domésticos (co)variance components  heteroscedasticity  Bayesian inference  multiple regression.	
Resumo: 	Assuming that selection in closed herds can promote reduction in additive genetic variance, multiple regression models were used to estimate this change in additive genetic (co)variance component, over the years when the selection was done. Weights at 550 days (W550) were studied using simulated data of herds submitted to 20 years of selection. (Co)variance components were estimated assuming that the weight at 550 days was a new trait every five years, by multiple-trait analyses involving four traits in the animal model. Three multiple regression equations were fitted—RMI, RMM, RMF—estimating thus the additive genetic (co)variance components for the 20 years of selection and eight years prior to the selection process. The initial years of each generation of selection were used as a covariate in the RMI. In the RMM, intermediate years were used, and the final years were considered in the RMF. The equations showed high coefficients of determination. However, there was no difference in the adjustment between the models. It was observed that the multiple regression models can be used in the estimation of genetic (co)variance components, when heteroscedasticity is assumed over time due to the selection process.	
Tipo: 	Pesquisa de campo	
Idioma: 	Português	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10934

10.4025/actascianimsci.v34i1.10934	
Editor: 	Editora da Universidade Estadual de Maringá	
Formato: 	application/pdf

application/pdf	
Fonte: 	Acta Scientiarum. Animal Sciences; v. 34, n. 1 (2012); 83-90

Acta Scientiarum. Animal Sciences; v. 34, n. 1 (2012); 83-90	
Fonte: 	DECLARATION OF ORIGINALITY AND CESSATION OF COPYRIGHTI Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal. I also declare that once published in the Acta Scientiarum. Animal Sciences, a publication of the Universidade Estadual de Maringá, it will not be submitted by me or by any co-author to any scientific communication mean. In my name and in the name of co-authors, I shall cede the copyright of the above mentioned article to the Universidade Estadual de Maringá and I declare that I know that the non-observance of this norm may make me liable for the penalties contemplated in the Law for the Protection of Authors’ Rights (Act 9609 of the 19th February 1998).

DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS  Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Animal Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).