Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves
Autor(a) principal: | |
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Data de Publicação: | 2012 |
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=S1516-35982012000500013 |
Resumo: | The objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These genetic variances could be modeled by linear functions of the Charolais and Zebu genetic variances and the variance attributed to segregation. The breed compositions, the individual and maternal heterozygosis, the sex and age of dam at calving were significant sources of residual heteroskedasticity. The a posteriori means for heritabilities and sire and dam classifications were altered due to genetic and residual heteroskedasticity. |
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Revista Brasileira de Zootecnia (Online) |
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Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calvesanimal breedingBayesian inferenceCanchimcrossbreedingselectionThe objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These genetic variances could be modeled by linear functions of the Charolais and Zebu genetic variances and the variance attributed to segregation. The breed compositions, the individual and maternal heterozygosis, the sex and age of dam at calving were significant sources of residual heteroskedasticity. The a posteriori means for heritabilities and sire and dam classifications were altered due to genetic and residual heteroskedasticity.Sociedade Brasileira de Zootecnia2012-05-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013Revista Brasileira de Zootecnia v.41 n.5 2012reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982012000500013info:eu-repo/semantics/openAccessToral,Fábio Luiz BuraneloTorres Júnior,Roberto Augusto de AlmeidaLopes,Paulo SávioCardoso,Fernando FloresSilva,Luiz Otávio Campos daeng2012-07-18T00:00:00Zoai:scielo:S1516-35982012000500013Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2012-07-18T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false |
dc.title.none.fl_str_mv |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
title |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
spellingShingle |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves Toral,Fábio Luiz Buranelo animal breeding Bayesian inference Canchim crossbreeding selection |
title_short |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
title_full |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
title_fullStr |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
title_full_unstemmed |
Heteroskedasticity for weaning weight of Charolais-Zebu crossbred calves |
title_sort |
Heteroskedasticity for 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 Cardoso,Fernando Flores Silva,Luiz Otávio Campos da |
author_role |
author |
author2 |
Torres Júnior,Roberto Augusto de Almeida Lopes,Paulo Sávio Cardoso,Fernando Flores Silva,Luiz Otávio Campos da |
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 Cardoso,Fernando Flores Silva,Luiz Otávio Campos da |
dc.subject.por.fl_str_mv |
animal breeding Bayesian inference Canchim crossbreeding selection |
topic |
animal breeding Bayesian inference Canchim crossbreeding selection |
description |
The objective of the present study was to analyze models with genetic and/or residual heteroskedasticity for genetic evaluation of the weaning weight of Charolais-Zebu crossbred calves. Weaning weight data from 56,965 crossbred calves were analyzed using animal models with different combinations of genetic and residual heteroskedasticity and/or homoskedasticity. The inference on a posteriori distributions of genetic parameters were by the Monte Carlo method via Markov chains. The model with genetic and residual heteroskedasticity was the best fit on the data. Groups of animals with different genetic compositions, expressed as percentages of Charolais-Zebu breed alleles and individual and maternal heterozygosis, had different genetic variances. These genetic variances could be modeled by linear functions of the Charolais and Zebu genetic variances and the variance attributed to segregation. The breed compositions, the individual and maternal heterozygosis, the sex and age of dam at calving were significant sources of residual heteroskedasticity. The a posteriori means for heritabilities and sire and dam classifications were altered due to genetic and residual heteroskedasticity. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-05-01 |
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=S1516-35982012000500013 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500013 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-35982012000500013 |
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.41 n.5 2012 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 |
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1750318149622824960 |