Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves

Detalhes bibliográficos
Autor(a) principal: Toral,Fábio Luiz Buranelo
Data de Publicação: 2009
Outros Autores: Torres Júnior,Roberto Augusto de Almeida, Lopes,Paulo Sávio, Silva,Luiz Otávio Campos da, Reis Filho,João Cruz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Zootecnia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700011
Resumo: The objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the fitting criteria, the F-test for the reduction of residual sum of squares, coefficient of determination, residual sum of squares and mean of squared residuals, the three interval segmented polynomial (two knots) fitted to the data as well as the more complex polynomials.
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spelling Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calvesbeef cattleenvironmental effectsgenetic evaluationleast squareThe objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the fitting criteria, the F-test for the reduction of residual sum of squares, coefficient of determination, residual sum of squares and mean of squared residuals, the three interval segmented polynomial (two knots) fitted to the data as well as the more complex polynomials.Sociedade Brasileira de Zootecnia2009-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700011Revista Brasileira de Zootecnia v.38 n.7 2009reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982009000700011info:eu-repo/semantics/openAccessToral,Fábio Luiz BuraneloTorres Júnior,Roberto Augusto de AlmeidaLopes,Paulo SávioSilva,Luiz Otávio Campos daReis Filho,João Cruzeng2009-09-15T00:00:00Zoai:scielo:S1516-35982009000700011Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2009-09-15T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false
dc.title.none.fl_str_mv Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
title Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
spellingShingle Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
Toral,Fábio Luiz Buranelo
beef cattle
environmental effects
genetic evaluation
least square
title_short Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
title_full Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
title_fullStr Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
title_full_unstemmed Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
title_sort Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
author Toral,Fábio Luiz Buranelo
author_facet Toral,Fábio Luiz Buranelo
Torres Júnior,Roberto Augusto de Almeida
Lopes,Paulo Sávio
Silva,Luiz Otávio Campos da
Reis Filho,João Cruz
author_role author
author2 Torres Júnior,Roberto Augusto de Almeida
Lopes,Paulo Sávio
Silva,Luiz Otávio Campos da
Reis Filho,João Cruz
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Toral,Fábio Luiz Buranelo
Torres Júnior,Roberto Augusto de Almeida
Lopes,Paulo Sávio
Silva,Luiz Otávio Campos da
Reis Filho,João Cruz
dc.subject.por.fl_str_mv beef cattle
environmental effects
genetic evaluation
least square
topic beef cattle
environmental effects
genetic evaluation
least square
description The objective of this study was to evaluate alternatives for modeling the age of dam at calving (AOD) effect on the weaning weight of Charolais-Zebu crossbred calves. Data from 56,965 calves were analyzed, using statistical models considering the fixed effects of the contemporary groups, sire and dam genetic groups, and AOD. The AOD effect was fitted to models using annual age classes, and ordinary quadratic to quintic-ordered polynomials (OP) or segmented polynomials (SP) with two, three, four, six and twelve evenly spaced intervals. In the case of segmented polynomials, general linear and quadratic effects and only one quadratic additional term from each knot were considered. The AOD effects were nested within sex of calf in all cases. According to the fitting criteria, the F-test for the reduction of residual sum of squares, coefficient of determination, residual sum of squares and mean of squared residuals, the three interval segmented polynomial (two knots) fitted to the data as well as the more complex polynomials.
publishDate 2009
dc.date.none.fl_str_mv 2009-07-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700011
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982009000700011
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-35982009000700011
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
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 Revista Brasileira de Zootecnia v.38 n.7 2009
reponame:Revista Brasileira de Zootecnia (Online)
instname:Sociedade Brasileira de Zootecnia (SBZ)
instacron:SBZ
instname_str Sociedade Brasileira de Zootecnia (SBZ)
instacron_str SBZ
institution SBZ
reponame_str Revista Brasileira de Zootecnia (Online)
collection Revista Brasileira de Zootecnia (Online)
repository.name.fl_str_mv Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)
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