Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/25355 |
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© 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. |
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Genetic and environmental effects on age at first farrowing in sows in southeastern BrazilPubertyReproductionNon-genetic factorsWe 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© 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.FUNPEC-RP2019-02-19T15:24:22Z2011-01-01T00:00:00Z2011info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/25355eng1676-568010.4238/2011.October.31.9Cavalcante-Neto, A.Lui, J. F.Sarmento, J. L. R.Ribeiro, M. N.Fonseca, C.Tonhati, H.Monteiro, J. M. C.Lara, M. A. C.Queiroz, S. A.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:48:20Zoai:ria.ua.pt:10773/25355Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:58:17.290540Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
title |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
spellingShingle |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil Cavalcante-Neto, A. Puberty Reproduction Non-genetic factors |
title_short |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
title_full |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
title_fullStr |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
title_full_unstemmed |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
title_sort |
Genetic and environmental effects on age at first farrowing in sows in southeastern Brazil |
author |
Cavalcante-Neto, A. |
author_facet |
Cavalcante-Neto, A. Lui, J. F. Sarmento, J. L. R. Ribeiro, M. N. Fonseca, C. Tonhati, H. Monteiro, J. M. C. Lara, M. A. C. Queiroz, S. A. |
author_role |
author |
author2 |
Lui, J. F. Sarmento, J. L. R. Ribeiro, M. N. Fonseca, C. Tonhati, H. Monteiro, J. M. C. Lara, M. A. C. Queiroz, S. A. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Cavalcante-Neto, A. Lui, J. F. Sarmento, J. L. R. Ribeiro, M. N. Fonseca, C. Tonhati, H. Monteiro, J. M. C. Lara, M. A. C. Queiroz, S. A. |
dc.subject.por.fl_str_mv |
Puberty Reproduction Non-genetic factors |
topic |
Puberty Reproduction Non-genetic factors |
description |
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© 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. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-01-01T00:00:00Z 2011 2019-02-19T15:24:22Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/25355 |
url |
http://hdl.handle.net/10773/25355 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1676-5680 10.4238/2011.October.31.9 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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FUNPEC-RP |
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FUNPEC-RP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137637375672320 |