Você está no menu de acessibilidade

Utilize este identificador para citar ou criar um link para este item: http://acervodigital.unesp.br/handle/11449/4965
Título: 
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil
Autor(es): 
Instituição: 
  • Universidade de Aveiro
  • Universidade Estadual Paulista (UNESP)
  • Universidade de São Paulo (USP)
  • Universidade Federal de Pernambuco (UFPE)
  • Escola Técnica Federal de Muzambinho (ETF-Muz)
ISSN: 
1676-5680
Financiador: 
  • Fundação para a Ciência e a Tecnologia (FCT)
  • ALBAN
  • European Union
Número do financiamento: 
  • FCT: SFRH/BD/47821/2008
  • European Union: E07D402597BR
Resumo: 
We evaluated genetic and environmental factors affecting age at first farrowing of sows in the Brazilian southeast. For this purpose, 466 observations regarding the age at first farrowing were made for Dalland-C40 (c) animals belonging to two herds. The effects of the environmental factors on this trait were assessed by means of a model that included, as random effects, the influence of the sow's father and mother and, as fixed effects, the influence the year of birth, the herd and the birth season, along with the covariable litter size at birth. The variance components were estimated using the derivative-free restricted maximum likelihood method. The estimated mean was 354.8 +/- 25.87 days, with a coefficient of variation of 7.29%. Significant effects on the trait were observed for the herd, the year and the season of birth; but a linear effect of litter size at birth on the age at first farrowing was not observed. The boar did not significantly contribute to the variation occurring among the sows, whereas the sow's mother caused significant variation. The heritability estimate for the age at first farrowing was 0.44 +/- 0.15, which is considered high. We concluded that herd effect and year and season of birth should be taken into consideration for an accurate genetic comparison; consequently, the animals should be joined into contemporary groups.
Data de publicação: 
1-Jan-2011
Citação: 
Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 10, n. 4, p. 2860-2866, 2011.
Duração: 
2860-2866
Publicador: 
Funpec-editora
Palavras-chaves: 
  • Puberty
  • Reproduction
  • Non-genetic factors
Fonte: 
http://dx.doi.org/10.4238/2011.October.31.9
Endereço permanente: 
http://hdl.handle.net/11449/4965
Direitos de acesso: 
Acesso aberto
Tipo: 
outro
Fonte completa:
http://repositorio.unesp.br/handle/11449/4965
Aparece nas coleções:Artigos, TCCs, Teses e Dissertações da Unesp

Não há nenhum arquivo associado com este item.
 

Itens do Acervo digital da UNESP são protegidos por direitos autorais reservados a menos que seja expresso o contrário.