Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1516-35982005000100008 http://hdl.handle.net/11449/68090 |
Resumo: | The objectives of this work were to estimate the genetic parameters and the genetic trends of the direct and maternal effects for the trait days to gain 160 kg (D160) in the pre-weaning period, and of the direct effect for the trait days to gain 240 kg (D240) in the post-weaning period, of animals of Nellore breed, born from 1965 to 2001 in the Northeast region of Brazil. The analyses were carried out using the MTDFREML software. For D160 the model included the direct and maternal genetic random effects and maternal permanent environmental effect, besides the fixed effects of contemporary group and the covariate age of dam at calving, assuming the covariance between maternal and direct effect equal to zero (σ am=0). For D240, the same fixed effects were considered, however, just the direct genetic effect as random. The genetic trends were estimated by linear regression of the breeding values on year of birth of the animals. The direct and maternal heritabilities for D160, respectively, were 0.12 ± 0.01 and 0.07 ± 0.02. The direct heritability for D240 was 0.16 ± 0.02. The genetic trends of the direct effects were significant, with estimated values of -0.14 and -0.41 days/year for D160 and D240, respectively. The genetic trend of the maternal effect for D160 was significant and equal to -0.0037 days/year. The genetic trends were favorable, however, inferiors the potential gain. |
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Repositório Institucional da UNESP |
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Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasilGenetic trends for traits related to the growth rate in nellore cattle raised in the northeast region of brazilGenetic gainGenetic parametersHeritabilitiesAnimaliaBos taurusThe objectives of this work were to estimate the genetic parameters and the genetic trends of the direct and maternal effects for the trait days to gain 160 kg (D160) in the pre-weaning period, and of the direct effect for the trait days to gain 240 kg (D240) in the post-weaning period, of animals of Nellore breed, born from 1965 to 2001 in the Northeast region of Brazil. The analyses were carried out using the MTDFREML software. For D160 the model included the direct and maternal genetic random effects and maternal permanent environmental effect, besides the fixed effects of contemporary group and the covariate age of dam at calving, assuming the covariance between maternal and direct effect equal to zero (σ am=0). For D240, the same fixed effects were considered, however, just the direct genetic effect as random. The genetic trends were estimated by linear regression of the breeding values on year of birth of the animals. The direct and maternal heritabilities for D160, respectively, were 0.12 ± 0.01 and 0.07 ± 0.02. The direct heritability for D240 was 0.16 ± 0.02. The genetic trends of the direct effects were significant, with estimated values of -0.14 and -0.41 days/year for D160 and D240, respectively. The genetic trend of the maternal effect for D160 was significant and equal to -0.0037 days/year. The genetic trends were favorable, however, inferiors the potential gain.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)C. Biológicas A/C Genética Unesp, BotucatuDCB UESB, Jequié-BAUFPI Bolsista do CNPqEmbrapa Caprinos Bolsista CNPqUFCDZ UFPRC. Biológicas A/C Genética Unesp, BotucatuUniversidade Estadual Paulista (Unesp)Universidade Estadual do Sudoeste da Bahia (UESB)Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)UFCUniversidade Federal do Paraná (UFPR)Malhado, Carlos Henrique Mendes [UNESP]Filho, Raimundo MartinsLôbo, Raimundo Nonato BragaFacó, OlivardoAzevedo, Danielle Maria Machado RibeiroDe Souza, Julio CésarOliveira, Sonia Maria Pinheiro2014-05-27T11:21:15Z2014-05-27T11:21:15Z2005-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article60-65application/pdfhttp://dx.doi.org/10.1590/S1516-35982005000100008Revista Brasileira de Zootecnia, v. 34, n. 1, p. 60-65, 2005.1516-3598http://hdl.handle.net/11449/6809010.1590/S1516-35982005000100008S1516-359820050001000082-s2.0-315444646392-s2.0-31544464639.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileira de Zootecnia0,337info:eu-repo/semantics/openAccess2023-12-26T06:21:05Zoai:repositorio.unesp.br:11449/68090Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:22:31.158430Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil Genetic trends for traits related to the growth rate in nellore cattle raised in the northeast region of brazil |
title |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil |
spellingShingle |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil Malhado, Carlos Henrique Mendes [UNESP] Genetic gain Genetic parameters Heritabilities Animalia Bos taurus |
title_short |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil |
title_full |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil |
title_fullStr |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil |
title_full_unstemmed |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil |
title_sort |
Tendências genéticas para características relacionadas à velocidade de crescimento em bovinos nelore na região nordeste do brasil |
author |
Malhado, Carlos Henrique Mendes [UNESP] |
author_facet |
Malhado, Carlos Henrique Mendes [UNESP] Filho, Raimundo Martins Lôbo, Raimundo Nonato Braga Facó, Olivardo Azevedo, Danielle Maria Machado Ribeiro De Souza, Julio César Oliveira, Sonia Maria Pinheiro |
author_role |
author |
author2 |
Filho, Raimundo Martins Lôbo, Raimundo Nonato Braga Facó, Olivardo Azevedo, Danielle Maria Machado Ribeiro De Souza, Julio César Oliveira, Sonia Maria Pinheiro |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Estadual do Sudoeste da Bahia (UESB) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) UFC Universidade Federal do Paraná (UFPR) |
dc.contributor.author.fl_str_mv |
Malhado, Carlos Henrique Mendes [UNESP] Filho, Raimundo Martins Lôbo, Raimundo Nonato Braga Facó, Olivardo Azevedo, Danielle Maria Machado Ribeiro De Souza, Julio César Oliveira, Sonia Maria Pinheiro |
dc.subject.por.fl_str_mv |
Genetic gain Genetic parameters Heritabilities Animalia Bos taurus |
topic |
Genetic gain Genetic parameters Heritabilities Animalia Bos taurus |
description |
The objectives of this work were to estimate the genetic parameters and the genetic trends of the direct and maternal effects for the trait days to gain 160 kg (D160) in the pre-weaning period, and of the direct effect for the trait days to gain 240 kg (D240) in the post-weaning period, of animals of Nellore breed, born from 1965 to 2001 in the Northeast region of Brazil. The analyses were carried out using the MTDFREML software. For D160 the model included the direct and maternal genetic random effects and maternal permanent environmental effect, besides the fixed effects of contemporary group and the covariate age of dam at calving, assuming the covariance between maternal and direct effect equal to zero (σ am=0). For D240, the same fixed effects were considered, however, just the direct genetic effect as random. The genetic trends were estimated by linear regression of the breeding values on year of birth of the animals. The direct and maternal heritabilities for D160, respectively, were 0.12 ± 0.01 and 0.07 ± 0.02. The direct heritability for D240 was 0.16 ± 0.02. The genetic trends of the direct effects were significant, with estimated values of -0.14 and -0.41 days/year for D160 and D240, respectively. The genetic trend of the maternal effect for D160 was significant and equal to -0.0037 days/year. The genetic trends were favorable, however, inferiors the potential gain. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-01-01 2014-05-27T11:21:15Z 2014-05-27T11:21:15Z |
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://dx.doi.org/10.1590/S1516-35982005000100008 Revista Brasileira de Zootecnia, v. 34, n. 1, p. 60-65, 2005. 1516-3598 http://hdl.handle.net/11449/68090 10.1590/S1516-35982005000100008 S1516-35982005000100008 2-s2.0-31544464639 2-s2.0-31544464639.pdf |
url |
http://dx.doi.org/10.1590/S1516-35982005000100008 http://hdl.handle.net/11449/68090 |
identifier_str_mv |
Revista Brasileira de Zootecnia, v. 34, n. 1, p. 60-65, 2005. 1516-3598 10.1590/S1516-35982005000100008 S1516-35982005000100008 2-s2.0-31544464639 2-s2.0-31544464639.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Zootecnia 0,337 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
60-65 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129314313469952 |