Modeling the effect of the age of dam at calving on the weaning weight of Charolais-Zebu crossbred calves
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
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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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) |
repository.mail.fl_str_mv |
||bz@sbz.org.br|| secretariarbz@sbz.org.br |
_version_ |
1750318144320176128 |