Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.

Detalhes bibliográficos
Autor(a) principal: COSTA, C. N.
Data de Publicação: 2010
Outros Autores: CARVALHEIRA, J., COBUCI, J. A., FREITAS, A. F. de, THOMPSON, G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/881486
Resumo: This study was aimed to estimate variance components and genetic parameters for daily fat and protein yields of Brazilian Holstein cattle, using an autoregressive test day multiple lactations (AR) animal model. Data consisted of test day (TD) records produced by Holstein cows under milk recording supervised by the Brazilian Holstein Association, calving from 1993 to 2004. Medium to high heritability estimates (from 0.18 to 0.30 and from 0.30 to 0.43 for fat and protein TD yields, respectively) suggest opportunities for larger genetic gain by selection. Results from this study confirm the potential of using TD yields to replace the lactation model to estimate breeding values of Holstein cows in Brazil. Further studies are needed to compare these results with other modelling approaches e.g., the RR model.
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spelling Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.Milk componentsSelectionTest-day modelVariance componentsdairy cattleThis study was aimed to estimate variance components and genetic parameters for daily fat and protein yields of Brazilian Holstein cattle, using an autoregressive test day multiple lactations (AR) animal model. Data consisted of test day (TD) records produced by Holstein cows under milk recording supervised by the Brazilian Holstein Association, calving from 1993 to 2004. Medium to high heritability estimates (from 0.18 to 0.30 and from 0.30 to 0.43 for fat and protein TD yields, respectively) suggest opportunities for larger genetic gain by selection. Results from this study confirm the potential of using TD yields to replace the lactation model to estimate breeding values of Holstein cows in Brazil. Further studies are needed to compare these results with other modelling approaches e.g., the RR model.CLAUDIO NAPOLIS COSTA, CNPGL; J. CARVALHEIRA, UNIVERSITY OF PORTO, PORTUGAL; JAIME ARAÚJO COBUCI, UFRS; ARY FERREIRA DE FREITAS, Pesquisador aposentado do CNPGL; G. THOMPSON, UNIVERSITY OF PORTO, PORTUGAL.COSTA, C. N.CARVALHEIRA, J.COBUCI, J. A.FREITAS, A. F. deTHOMPSON, G.2024-02-15T14:32:34Z2024-02-15T14:32:34Z2011-03-182010info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleSouth African Journal of Animal Science, v. 39, n. 5, p. 165-168, 2010.http://www.alice.cnptia.embrapa.br/alice/handle/doc/881486enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2024-02-15T14:32:34Zoai:www.alice.cnptia.embrapa.br:doc/881486Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542024-02-15T14:32:34Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
title Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
spellingShingle Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
COSTA, C. N.
Milk components
Selection
Test-day model
Variance components
dairy cattle
title_short Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
title_full Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
title_fullStr Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
title_full_unstemmed Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
title_sort Estimation of genetic parameters of test day fat and protein yields in Brazilian Holstein cattle using an autoregressive multiple lactation animal model.
author COSTA, C. N.
author_facet COSTA, C. N.
CARVALHEIRA, J.
COBUCI, J. A.
FREITAS, A. F. de
THOMPSON, G.
author_role author
author2 CARVALHEIRA, J.
COBUCI, J. A.
FREITAS, A. F. de
THOMPSON, G.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv CLAUDIO NAPOLIS COSTA, CNPGL; J. CARVALHEIRA, UNIVERSITY OF PORTO, PORTUGAL; JAIME ARAÚJO COBUCI, UFRS; ARY FERREIRA DE FREITAS, Pesquisador aposentado do CNPGL; G. THOMPSON, UNIVERSITY OF PORTO, PORTUGAL.
dc.contributor.author.fl_str_mv COSTA, C. N.
CARVALHEIRA, J.
COBUCI, J. A.
FREITAS, A. F. de
THOMPSON, G.
dc.subject.por.fl_str_mv Milk components
Selection
Test-day model
Variance components
dairy cattle
topic Milk components
Selection
Test-day model
Variance components
dairy cattle
description This study was aimed to estimate variance components and genetic parameters for daily fat and protein yields of Brazilian Holstein cattle, using an autoregressive test day multiple lactations (AR) animal model. Data consisted of test day (TD) records produced by Holstein cows under milk recording supervised by the Brazilian Holstein Association, calving from 1993 to 2004. Medium to high heritability estimates (from 0.18 to 0.30 and from 0.30 to 0.43 for fat and protein TD yields, respectively) suggest opportunities for larger genetic gain by selection. Results from this study confirm the potential of using TD yields to replace the lactation model to estimate breeding values of Holstein cows in Brazil. Further studies are needed to compare these results with other modelling approaches e.g., the RR model.
publishDate 2010
dc.date.none.fl_str_mv 2010
2011-03-18
2024-02-15T14:32:34Z
2024-02-15T14:32:34Z
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 South African Journal of Animal Science, v. 39, n. 5, p. 165-168, 2010.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/881486
identifier_str_mv South African Journal of Animal Science, v. 39, n. 5, p. 165-168, 2010.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/881486
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv cg-riaa@embrapa.br
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