Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1080/09712119.2020.1856115 http://hdl.handle.net/11449/207006 |
Resumo: | The present study aims to estimate genetic parameters for dystocia, milk yield and age at first calving of Holstein cows reared in intensive production systems located in the southeastern region of Brazil. A total of 26,987 first-lactation records of Holstein cows were used. The following traits were analysed: 305-day cumulative first lactation milk yield (MY305), age at first calving (AFC) and dystocia. Dystocia was defined as a binary trait, with 0 indicating failure and 1 indicating success. Success was attributed to cows that had a normal calving, and failure was attributed to cows that had a difficult or human-assisted parturition. The (co)variance components were estimated using a Bayesian approach. The heritability estimates were 0.15 (0.01), 0.27 (0.02), and 0.17 (0.03) for MY305, AFC and dystocia, respectively. Dystocia showed genetic correlations of 0.30 (0.09) with AFC and −0.17 (0.11) with MY305. Early maturing heifers may be genetically prone to a more difficult first calving. |
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Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cowsDairy cattlegenetic correlationheritabilitythreshold modelThe present study aims to estimate genetic parameters for dystocia, milk yield and age at first calving of Holstein cows reared in intensive production systems located in the southeastern region of Brazil. A total of 26,987 first-lactation records of Holstein cows were used. The following traits were analysed: 305-day cumulative first lactation milk yield (MY305), age at first calving (AFC) and dystocia. Dystocia was defined as a binary trait, with 0 indicating failure and 1 indicating success. Success was attributed to cows that had a normal calving, and failure was attributed to cows that had a difficult or human-assisted parturition. The (co)variance components were estimated using a Bayesian approach. The heritability estimates were 0.15 (0.01), 0.27 (0.02), and 0.17 (0.03) for MY305, AFC and dystocia, respectively. Dystocia showed genetic correlations of 0.30 (0.09) with AFC and −0.17 (0.11) with MY305. Early maturing heifers may be genetically prone to a more difficult first calving.Zootecnia Faculdade de Ciências Agrárias e Veterinárias – UnespInstituto de Zootecnia Centro de Pesquisas de Bovinos de CorteFaculdade Patos de MinasGrupo de Melhoramento Animal de Mato Grosso Instituto de Ciências Agrárias e Tecnológicas – UFMTGestor Leite CRV LagoaThis research is part of the coauthor's Master's Dissertation at Instituto de Zootecnia Centro de Pesquisas de Bovinos de CorteZootecnia Faculdade de Ciências Agrárias e Veterinárias – UnespUniversidade Estadual Paulista (Unesp)Centro de Pesquisas de Bovinos de CorteFaculdade Patos de MinasInstituto de Ciências Agrárias e Tecnológicas – UFMTCRV LagoaStefani, Gabriela [UNESP]Brandão Aquaroli, DanieleBatista Gonçalves Costa Júnior, JoãoSantana Júnior, Mário LuizTonhati, Humberto [UNESP]Sesana, Roberta CristinaEl Faro, Lenira2021-06-25T10:47:31Z2021-06-25T10:47:31Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-5http://dx.doi.org/10.1080/09712119.2020.1856115Journal of Applied Animal Research, v. 49, n. 1, p. 1-5, 2021.0974-18440971-2119http://hdl.handle.net/11449/20700610.1080/09712119.2020.18561152-s2.0-85097931062Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Animal Researchinfo:eu-repo/semantics/openAccess2021-10-23T16:00:41Zoai:repositorio.unesp.br:11449/207006Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T16:00:41Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
title |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
spellingShingle |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows Stefani, Gabriela [UNESP] Dairy cattle genetic correlation heritability threshold model |
title_short |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
title_full |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
title_fullStr |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
title_full_unstemmed |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
title_sort |
Genetic parameters for dystocia, milk yield and age at first calving in Brazilian Holstein cows |
author |
Stefani, Gabriela [UNESP] |
author_facet |
Stefani, Gabriela [UNESP] Brandão Aquaroli, Daniele Batista Gonçalves Costa Júnior, João Santana Júnior, Mário Luiz Tonhati, Humberto [UNESP] Sesana, Roberta Cristina El Faro, Lenira |
author_role |
author |
author2 |
Brandão Aquaroli, Daniele Batista Gonçalves Costa Júnior, João Santana Júnior, Mário Luiz Tonhati, Humberto [UNESP] Sesana, Roberta Cristina El Faro, Lenira |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Centro de Pesquisas de Bovinos de Corte Faculdade Patos de Minas Instituto de Ciências Agrárias e Tecnológicas – UFMT CRV Lagoa |
dc.contributor.author.fl_str_mv |
Stefani, Gabriela [UNESP] Brandão Aquaroli, Daniele Batista Gonçalves Costa Júnior, João Santana Júnior, Mário Luiz Tonhati, Humberto [UNESP] Sesana, Roberta Cristina El Faro, Lenira |
dc.subject.por.fl_str_mv |
Dairy cattle genetic correlation heritability threshold model |
topic |
Dairy cattle genetic correlation heritability threshold model |
description |
The present study aims to estimate genetic parameters for dystocia, milk yield and age at first calving of Holstein cows reared in intensive production systems located in the southeastern region of Brazil. A total of 26,987 first-lactation records of Holstein cows were used. The following traits were analysed: 305-day cumulative first lactation milk yield (MY305), age at first calving (AFC) and dystocia. Dystocia was defined as a binary trait, with 0 indicating failure and 1 indicating success. Success was attributed to cows that had a normal calving, and failure was attributed to cows that had a difficult or human-assisted parturition. The (co)variance components were estimated using a Bayesian approach. The heritability estimates were 0.15 (0.01), 0.27 (0.02), and 0.17 (0.03) for MY305, AFC and dystocia, respectively. Dystocia showed genetic correlations of 0.30 (0.09) with AFC and −0.17 (0.11) with MY305. Early maturing heifers may be genetically prone to a more difficult first calving. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:47:31Z 2021-06-25T10:47:31Z 2021-01-01 |
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/10.1080/09712119.2020.1856115 Journal of Applied Animal Research, v. 49, n. 1, p. 1-5, 2021. 0974-1844 0971-2119 http://hdl.handle.net/11449/207006 10.1080/09712119.2020.1856115 2-s2.0-85097931062 |
url |
http://dx.doi.org/10.1080/09712119.2020.1856115 http://hdl.handle.net/11449/207006 |
identifier_str_mv |
Journal of Applied Animal Research, v. 49, n. 1, p. 1-5, 2021. 0974-1844 0971-2119 10.1080/09712119.2020.1856115 2-s2.0-85097931062 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Applied Animal Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-5 |
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_ |
1799964962725036032 |