Análise Genética de Características Reprodutivas Na Raça Brahman
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4321/S0004-05922012000400008 http://hdl.handle.net/11449/73908 |
Resumo: | Aiming to establish selection criteria for the Brahman cattle in Brazil, the objective of this paper was to estimate genetic and environmental parameters for birth weight (BW), gestation length (GL) and scrotal circumference at 365 (SC365), 455 (SC455) and 550 (SC 550) days of age, and relative efficiency of indirect versus direct selection for these traits. Data were obtained from 15 851 animals belonging to 16 herds in six states, enrolled in a genetic breeding program. (Co)variance and heritability coefficients and genetic and environmental correlations between traits were estimated by restricted maximum likelihood (REML) under a multi trait animal model. The model included as fixed effects the contemporary group and the age of cow at calving as a covariate (linear and quadratic), and as random the direct genetic, the permanent environmental and residual effects. For BW and GL it was also considered the maternal genetic effect as random. Estimates of direct heritabilities were 0.36, 0.29, 0.55, 0.43 and 0.40 for BW, GL, SC365, SC455 and SC550, respectively. Genetic correlations between BW and GL, GL and SC365, GL and SC455, GL and SC550, SC365 and SC455, SC365 and SC550 and SC455 and SC550, were respectively 0.06, 0.13, 0.20, 0.13, 0.96, 0.98 and 0.99. The heritabilities estimates for all traits indicated these show enough additive genetic variability to respond favorably to selection. For sexual precocity, the best option would be SC365, due to the high value of heritability and to indirect selection at this age being more efficient than direct selection for PE455. |
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Análise Genética de Características Reprodutivas Na Raça BrahmanGenetic analysis of reproductive traits in brahman cattleBirth weightGenetic parametersGestation lengthRelative efficiency of selectionScrotal circumferenceAnimaliaBosAiming to establish selection criteria for the Brahman cattle in Brazil, the objective of this paper was to estimate genetic and environmental parameters for birth weight (BW), gestation length (GL) and scrotal circumference at 365 (SC365), 455 (SC455) and 550 (SC 550) days of age, and relative efficiency of indirect versus direct selection for these traits. Data were obtained from 15 851 animals belonging to 16 herds in six states, enrolled in a genetic breeding program. (Co)variance and heritability coefficients and genetic and environmental correlations between traits were estimated by restricted maximum likelihood (REML) under a multi trait animal model. The model included as fixed effects the contemporary group and the age of cow at calving as a covariate (linear and quadratic), and as random the direct genetic, the permanent environmental and residual effects. For BW and GL it was also considered the maternal genetic effect as random. Estimates of direct heritabilities were 0.36, 0.29, 0.55, 0.43 and 0.40 for BW, GL, SC365, SC455 and SC550, respectively. Genetic correlations between BW and GL, GL and SC365, GL and SC455, GL and SC550, SC365 and SC455, SC365 and SC550 and SC455 and SC550, were respectively 0.06, 0.13, 0.20, 0.13, 0.96, 0.98 and 0.99. The heritabilities estimates for all traits indicated these show enough additive genetic variability to respond favorably to selection. For sexual precocity, the best option would be SC365, due to the high value of heritability and to indirect selection at this age being more efficient than direct selection for PE455.Associação dos Criadores de Brahman do Brasil, Uberaba, MGUniversidade Estadual Paulista (UNESP) Faculdade de Ciências Agrárias e Veterinárias (FCAV), Jaboticabal, SPAssociação Nacional de Criadores e Pesquisadores, Ribeirão Preto, SPUniversidade Estadual Paulista (UNESP) Faculdade de Ciências Agrárias e Veterinárias (FCAV), Jaboticabal, SPAssociação dos Criadores de Brahman do BrasilUniversidade Estadual Paulista (Unesp)Associação Nacional de Criadores e PesquisadoresFaria, L. C.Queiroz, S. A. [UNESP]Lôbo, R. B.Buzanskas, M. E. [UNESP]Venturini, G. C. [UNESP]Munari, D. P. [UNESP]E Oliveira, J. A. [UNESP]2014-05-27T11:27:21Z2014-05-27T11:27:21Z2012-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article559-567application/pdfhttp://dx.doi.org/10.4321/S0004-05922012000400008Archivos de Zootecnia, v. 61, n. 236, p. 559-567, 2012.0004-05921885-4494http://hdl.handle.net/11449/7390810.4321/S0004-05922012000400008S0004-059220120004000082-s2.0-84871677252S0004-05922012000400008.pdf90960875579776106064277731903249Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengporArchivos de Zootecnia0,202info:eu-repo/semantics/openAccess2024-01-08T06:28:34Zoai:repositorio.unesp.br:11449/73908Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-08T06:28:34Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Análise Genética de Características Reprodutivas Na Raça Brahman Genetic analysis of reproductive traits in brahman cattle |
title |
Análise Genética de Características Reprodutivas Na Raça Brahman |
spellingShingle |
Análise Genética de Características Reprodutivas Na Raça Brahman Faria, L. C. Birth weight Genetic parameters Gestation length Relative efficiency of selection Scrotal circumference Animalia Bos |
title_short |
Análise Genética de Características Reprodutivas Na Raça Brahman |
title_full |
Análise Genética de Características Reprodutivas Na Raça Brahman |
title_fullStr |
Análise Genética de Características Reprodutivas Na Raça Brahman |
title_full_unstemmed |
Análise Genética de Características Reprodutivas Na Raça Brahman |
title_sort |
Análise Genética de Características Reprodutivas Na Raça Brahman |
author |
Faria, L. C. |
author_facet |
Faria, L. C. Queiroz, S. A. [UNESP] Lôbo, R. B. Buzanskas, M. E. [UNESP] Venturini, G. C. [UNESP] Munari, D. P. [UNESP] E Oliveira, J. A. [UNESP] |
author_role |
author |
author2 |
Queiroz, S. A. [UNESP] Lôbo, R. B. Buzanskas, M. E. [UNESP] Venturini, G. C. [UNESP] Munari, D. P. [UNESP] E Oliveira, J. A. [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Associação dos Criadores de Brahman do Brasil Universidade Estadual Paulista (Unesp) Associação Nacional de Criadores e Pesquisadores |
dc.contributor.author.fl_str_mv |
Faria, L. C. Queiroz, S. A. [UNESP] Lôbo, R. B. Buzanskas, M. E. [UNESP] Venturini, G. C. [UNESP] Munari, D. P. [UNESP] E Oliveira, J. A. [UNESP] |
dc.subject.por.fl_str_mv |
Birth weight Genetic parameters Gestation length Relative efficiency of selection Scrotal circumference Animalia Bos |
topic |
Birth weight Genetic parameters Gestation length Relative efficiency of selection Scrotal circumference Animalia Bos |
description |
Aiming to establish selection criteria for the Brahman cattle in Brazil, the objective of this paper was to estimate genetic and environmental parameters for birth weight (BW), gestation length (GL) and scrotal circumference at 365 (SC365), 455 (SC455) and 550 (SC 550) days of age, and relative efficiency of indirect versus direct selection for these traits. Data were obtained from 15 851 animals belonging to 16 herds in six states, enrolled in a genetic breeding program. (Co)variance and heritability coefficients and genetic and environmental correlations between traits were estimated by restricted maximum likelihood (REML) under a multi trait animal model. The model included as fixed effects the contemporary group and the age of cow at calving as a covariate (linear and quadratic), and as random the direct genetic, the permanent environmental and residual effects. For BW and GL it was also considered the maternal genetic effect as random. Estimates of direct heritabilities were 0.36, 0.29, 0.55, 0.43 and 0.40 for BW, GL, SC365, SC455 and SC550, respectively. Genetic correlations between BW and GL, GL and SC365, GL and SC455, GL and SC550, SC365 and SC455, SC365 and SC550 and SC455 and SC550, were respectively 0.06, 0.13, 0.20, 0.13, 0.96, 0.98 and 0.99. The heritabilities estimates for all traits indicated these show enough additive genetic variability to respond favorably to selection. For sexual precocity, the best option would be SC365, due to the high value of heritability and to indirect selection at this age being more efficient than direct selection for PE455. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-12-01 2014-05-27T11:27:21Z 2014-05-27T11:27:21Z |
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/10.4321/S0004-05922012000400008 Archivos de Zootecnia, v. 61, n. 236, p. 559-567, 2012. 0004-0592 1885-4494 http://hdl.handle.net/11449/73908 10.4321/S0004-05922012000400008 S0004-05922012000400008 2-s2.0-84871677252 S0004-05922012000400008.pdf 9096087557977610 6064277731903249 |
url |
http://dx.doi.org/10.4321/S0004-05922012000400008 http://hdl.handle.net/11449/73908 |
identifier_str_mv |
Archivos de Zootecnia, v. 61, n. 236, p. 559-567, 2012. 0004-0592 1885-4494 10.4321/S0004-05922012000400008 S0004-05922012000400008 2-s2.0-84871677252 S0004-05922012000400008.pdf 9096087557977610 6064277731903249 |
dc.language.iso.fl_str_mv |
eng por |
language |
eng por |
dc.relation.none.fl_str_mv |
Archivos de Zootecnia 0,202 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
559-567 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 |
|
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1797790240064143360 |