Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1516-35982012000300017 http://hdl.handle.net/11449/4518 |
Resumo: | The objective of this study was to estimate heritability and verify the genetic correlations between heifers subsequent rebreeding with weaning hip height (WHH) and yearling hip height (YHH), using Bayesian inference. The (co)variance components and genetic parameters were estimated using an animal nonlinear (threshold) model for subsequent rebreeding and an animal linear model for WHH and YHH. The animal model included the contemporary group as the systematic effect and direct additive genetic and residual effects as random effects. Genetic maternal and maternal permanent environment effects were also considered in the model for WHH. Covariables considered were: rest period (linear effect), for subsequent rebreeding; animal age at measurement and age of cow at calving (linear and quadratic effects), for WHH and YHH. Direct heritability estimates were 0.14±0.04, 0.45±0.03 and 0.51±0.02 for subsequent rebreeding, WHH and YHH, respectively. For maternal effects, the heritability of WHH and the proportion attributed to the permanent environmental effect were 0.08±0.02 and 0.04, respectively. The posterior means of genetic correlations estimates between subsequent rebreeding with WHH and YHH were -0.16±0.05 and -0.21±0.04, respectively. Selection response for subsequent rebreeding of heifers would be low. Increase in the rate of subsequent rebreeding could be obtained with improvements in the management applied to heifers. The inclusion of hip height in selection indices, especially when measured at yearling, promotes small reduction in the rate of subsequent rebreeding of Nellore heifers. |
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Repositório Institucional da UNESP |
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Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattleBayesian inferenceBeef cattleHeritabilityreproductive traitThe objective of this study was to estimate heritability and verify the genetic correlations between heifers subsequent rebreeding with weaning hip height (WHH) and yearling hip height (YHH), using Bayesian inference. The (co)variance components and genetic parameters were estimated using an animal nonlinear (threshold) model for subsequent rebreeding and an animal linear model for WHH and YHH. The animal model included the contemporary group as the systematic effect and direct additive genetic and residual effects as random effects. Genetic maternal and maternal permanent environment effects were also considered in the model for WHH. Covariables considered were: rest period (linear effect), for subsequent rebreeding; animal age at measurement and age of cow at calving (linear and quadratic effects), for WHH and YHH. Direct heritability estimates were 0.14±0.04, 0.45±0.03 and 0.51±0.02 for subsequent rebreeding, WHH and YHH, respectively. For maternal effects, the heritability of WHH and the proportion attributed to the permanent environmental effect were 0.08±0.02 and 0.04, respectively. The posterior means of genetic correlations estimates between subsequent rebreeding with WHH and YHH were -0.16±0.05 and -0.21±0.04, respectively. Selection response for subsequent rebreeding of heifers would be low. Increase in the rate of subsequent rebreeding could be obtained with improvements in the management applied to heifers. The inclusion of hip height in selection indices, especially when measured at yearling, promotes small reduction in the rate of subsequent rebreeding of Nellore heifers.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNESPUNESPSociedade Brasileira de ZootecniaUniversidade Estadual Paulista (Unesp)Boligon, Arione Augusti [UNESP]Albuquerque, Lucia Galvão de [UNESP]2014-05-20T13:18:26Z2014-05-20T13:18:26Z2012-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article598-602application/pdfhttp://dx.doi.org/10.1590/S1516-35982012000300017Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 41, n. 3, p. 598-602, 2012.1516-3598http://hdl.handle.net/11449/451810.1590/S1516-35982012000300017S1516-35982012000300017WOS:000303451600017S1516-35982012000300017.pdf5866981114947883SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRevista Brasileira de Zootecnia0,337info:eu-repo/semantics/openAccess2023-10-15T06:07:56Zoai:repositorio.unesp.br:11449/4518Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-15T06:07:56Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
title |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
spellingShingle |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle Boligon, Arione Augusti [UNESP] Bayesian inference Beef cattle Heritability reproductive trait |
title_short |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
title_full |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
title_fullStr |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
title_full_unstemmed |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
title_sort |
Genetic parameters and relationships between heifers rebreeding and hip height in Nellore cattle |
author |
Boligon, Arione Augusti [UNESP] |
author_facet |
Boligon, Arione Augusti [UNESP] Albuquerque, Lucia Galvão de [UNESP] |
author_role |
author |
author2 |
Albuquerque, Lucia Galvão de [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Boligon, Arione Augusti [UNESP] Albuquerque, Lucia Galvão de [UNESP] |
dc.subject.por.fl_str_mv |
Bayesian inference Beef cattle Heritability reproductive trait |
topic |
Bayesian inference Beef cattle Heritability reproductive trait |
description |
The objective of this study was to estimate heritability and verify the genetic correlations between heifers subsequent rebreeding with weaning hip height (WHH) and yearling hip height (YHH), using Bayesian inference. The (co)variance components and genetic parameters were estimated using an animal nonlinear (threshold) model for subsequent rebreeding and an animal linear model for WHH and YHH. The animal model included the contemporary group as the systematic effect and direct additive genetic and residual effects as random effects. Genetic maternal and maternal permanent environment effects were also considered in the model for WHH. Covariables considered were: rest period (linear effect), for subsequent rebreeding; animal age at measurement and age of cow at calving (linear and quadratic effects), for WHH and YHH. Direct heritability estimates were 0.14±0.04, 0.45±0.03 and 0.51±0.02 for subsequent rebreeding, WHH and YHH, respectively. For maternal effects, the heritability of WHH and the proportion attributed to the permanent environmental effect were 0.08±0.02 and 0.04, respectively. The posterior means of genetic correlations estimates between subsequent rebreeding with WHH and YHH were -0.16±0.05 and -0.21±0.04, respectively. Selection response for subsequent rebreeding of heifers would be low. Increase in the rate of subsequent rebreeding could be obtained with improvements in the management applied to heifers. The inclusion of hip height in selection indices, especially when measured at yearling, promotes small reduction in the rate of subsequent rebreeding of Nellore heifers. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-03-01 2014-05-20T13:18:26Z 2014-05-20T13:18:26Z |
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/S1516-35982012000300017 Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 41, n. 3, p. 598-602, 2012. 1516-3598 http://hdl.handle.net/11449/4518 10.1590/S1516-35982012000300017 S1516-35982012000300017 WOS:000303451600017 S1516-35982012000300017.pdf 5866981114947883 |
url |
http://dx.doi.org/10.1590/S1516-35982012000300017 http://hdl.handle.net/11449/4518 |
identifier_str_mv |
Revista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 41, n. 3, p. 598-602, 2012. 1516-3598 10.1590/S1516-35982012000300017 S1516-35982012000300017 WOS:000303451600017 S1516-35982012000300017.pdf 5866981114947883 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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 |
598-602 application/pdf |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Zootecnia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Zootecnia |
dc.source.none.fl_str_mv |
SciELO 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_ |
1799964573590093824 |