Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UnB |
Texto Completo: | http://repositorio.unb.br/handle/10482/30821 http://dx.doi.org/10.1590/s1806-92902017000200002 |
Resumo: | This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from -0.23 (top line) to 0.28 (angularity) to age at first calving, from -0.54 (final score) to 0.34 (foot angle) to calving interval, from -0.23 (angularity) to 0.56 (stature) to dry period, and from -0.52 (final score) to 0.36 (height udder) to first service period. Direct selection for any of the reproductive traits implies low genetic gains by virtue of their low heritabilities. Among the linear-type traits, the final score, chest width, top line, angularity, teat length, udder attachment, rear teat placement were highlighted as good auxiliary traits to improve reproductive efficiency of Holstein cows in Brazil. The simultaneous selection for reproductive and linear-type traits can lead a higher genetic progress in the reproductive traits. |
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Almeida, Tatiana PrestesKern, Elisandra LurdesDaltro, Darlene dos SantosBraccini Neto, JoséPimentel, Concepta Margaret McManusThaler Neto, AndréCobuci, Jaime Araujo2018-01-04T19:15:07Z2018-01-04T19:15:07Z2017-02ALMEIDA, Tatiana Prestes et al. Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 2, p. 91-98, fev. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000200002.http://repositorio.unb.br/handle/10482/30821http://dx.doi.org/10.1590/s1806-92902017000200002Sociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia - This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091&lng=en&nrm=iso. Acesso em: 17 jan. 2018.info:eu-repo/semantics/openAccessGenetic associations between reproductive and linear-type traits of Holstein cows in Brazilinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleParto animalBovino de leiteReprodução animalThis study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from -0.23 (top line) to 0.28 (angularity) to age at first calving, from -0.54 (final score) to 0.34 (foot angle) to calving interval, from -0.23 (angularity) to 0.56 (stature) to dry period, and from -0.52 (final score) to 0.36 (height udder) to first service period. Direct selection for any of the reproductive traits implies low genetic gains by virtue of their low heritabilities. Among the linear-type traits, the final score, chest width, top line, angularity, teat length, udder attachment, rear teat placement were highlighted as good auxiliary traits to improve reproductive efficiency of Holstein cows in Brazil. The simultaneous selection for reproductive and linear-type traits can lead a higher genetic progress in the reproductive traits.engreponame:Repositório Institucional da UnBinstname:Universidade de Brasília (UnB)instacron:UNBORIGINALARTIGO_GeneticAssociationsReproductive.pdfapplication/pdf1274827http://repositorio2.unb.br/jspui/bitstream/10482/30821/1/ARTIGO_GeneticAssociationsReproductive.pdfa5eca74a996110fb1a098e9db9a9bdcfMD51open access10482/308212023-05-24 20:39:11.626open accessoai:repositorio2.unb.br:10482/30821Biblioteca Digital de Teses e DissertaçõesPUBhttps://repositorio.unb.br/oai/requestopendoar:2023-05-24T23:39:11Repositório Institucional da UnB - Universidade de Brasília (UnB)false |
dc.title.pt_BR.fl_str_mv |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
spellingShingle |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil Almeida, Tatiana Prestes Parto animal Bovino de leite Reprodução animal |
title_short |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_full |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_fullStr |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_full_unstemmed |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
title_sort |
Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil |
author |
Almeida, Tatiana Prestes |
author_facet |
Almeida, Tatiana Prestes Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araujo |
author_role |
author |
author2 |
Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araujo |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Almeida, Tatiana Prestes Kern, Elisandra Lurdes Daltro, Darlene dos Santos Braccini Neto, José Pimentel, Concepta Margaret McManus Thaler Neto, André Cobuci, Jaime Araujo |
dc.subject.keyword.pt_BR.fl_str_mv |
Parto animal Bovino de leite Reprodução animal |
topic |
Parto animal Bovino de leite Reprodução animal |
description |
This study aimed to estimate heritability, genetic, and residual correlations between reproductive traits such as age at first calving, calving interval, dry period, and first service period and linear type traits measured in Holstein cows born between the years 1990 and 2008 in Brazil. The (co)variance components were estimated by restricted maximum likelihood, using the MTDFREML software. The heritability for reproductive traits and linear-type traits ranged from 0.02 to 0.03 and from 0.07 to 0.40, respectively. Estimates of genetic correlations between reproductive and linear-type traits ranged from -0.23 (top line) to 0.28 (angularity) to age at first calving, from -0.54 (final score) to 0.34 (foot angle) to calving interval, from -0.23 (angularity) to 0.56 (stature) to dry period, and from -0.52 (final score) to 0.36 (height udder) to first service period. Direct selection for any of the reproductive traits implies low genetic gains by virtue of their low heritabilities. Among the linear-type traits, the final score, chest width, top line, angularity, teat length, udder attachment, rear teat placement were highlighted as good auxiliary traits to improve reproductive efficiency of Holstein cows in Brazil. The simultaneous selection for reproductive and linear-type traits can lead a higher genetic progress in the reproductive traits. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-02 |
dc.date.accessioned.fl_str_mv |
2018-01-04T19:15:07Z |
dc.date.available.fl_str_mv |
2018-01-04T19:15:07Z |
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.citation.fl_str_mv |
ALMEIDA, Tatiana Prestes et al. Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 2, p. 91-98, fev. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000200002. |
dc.identifier.uri.fl_str_mv |
http://repositorio.unb.br/handle/10482/30821 |
dc.identifier.doi.pt_BR.fl_str_mv |
http://dx.doi.org/10.1590/s1806-92902017000200002 |
identifier_str_mv |
ALMEIDA, Tatiana Prestes et al. Genetic associations between reproductive and linear-type traits of Holstein cows in Brazil. Revista Brasileira de Zootecnia, Viçosa, v. 46, n. 2, p. 91-98, fev. 2017. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000200091&lng=en&nrm=iso>. Acesso em: 17 jan. 2018. doi: http://dx.doi.org/10.1590/s1806-92902017000200002. |
url |
http://repositorio.unb.br/handle/10482/30821 http://dx.doi.org/10.1590/s1806-92902017000200002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
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info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Zootecnia |
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Sociedade Brasileira de Zootecnia |
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http://repositorio2.unb.br/jspui/bitstream/10482/30821/1/ARTIGO_GeneticAssociationsReproductive.pdf |
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