Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)

Detalhes bibliográficos
Autor(a) principal: Carvalho,Samuel Pereira de
Data de Publicação: 1999
Outros Autores: Cruz,Cosme Damião, Carvalho,Claudio Guilherme Portela de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Genetics and Molecular Biology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100021
Resumo: It was shown that the classic selection index, under multicollinearity, could not give simultaneous gains for wheat grain production and its primary components. This was due to the instability and, consequently, low precision of the coefficient index estimates. A modification of the prediction process of the index was proposed to avoid the adverse effects of multicollinearity, adopting a procedure based on ridge regression theory. The modified classic selection index, or ridge index, gave more statistically viable index coefficient estimates and gains for all of the characters evaluated. However, lower gains for number of grains per spike and grain yield were obtained, when compared to those obtained with selection for grain yield.
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spelling Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)It was shown that the classic selection index, under multicollinearity, could not give simultaneous gains for wheat grain production and its primary components. This was due to the instability and, consequently, low precision of the coefficient index estimates. A modification of the prediction process of the index was proposed to avoid the adverse effects of multicollinearity, adopting a procedure based on ridge regression theory. The modified classic selection index, or ridge index, gave more statistically viable index coefficient estimates and gains for all of the characters evaluated. However, lower gains for number of grains per spike and grain yield were obtained, when compared to those obtained with selection for grain yield.Sociedade Brasileira de Genética1999-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100021Genetics and Molecular Biology v.22 n.1 1999reponame:Genetics and Molecular Biologyinstname:Sociedade Brasileira de Genética (SBG)instacron:SBG10.1590/S1415-47571999000100021info:eu-repo/semantics/openAccessCarvalho,Samuel Pereira deCruz,Cosme DamiãoCarvalho,Claudio Guilherme Portela deeng1999-06-02T00:00:00Zoai:scielo:S1415-47571999000100021Revistahttp://www.gmb.org.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||editor@gmb.org.br1678-46851415-4757opendoar:1999-06-02T00:00Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)false
dc.title.none.fl_str_mv Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
title Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
spellingShingle Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
Carvalho,Samuel Pereira de
title_short Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
title_full Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
title_fullStr Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
title_full_unstemmed Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
title_sort Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
author Carvalho,Samuel Pereira de
author_facet Carvalho,Samuel Pereira de
Cruz,Cosme Damião
Carvalho,Claudio Guilherme Portela de
author_role author
author2 Cruz,Cosme Damião
Carvalho,Claudio Guilherme Portela de
author2_role author
author
dc.contributor.author.fl_str_mv Carvalho,Samuel Pereira de
Cruz,Cosme Damião
Carvalho,Claudio Guilherme Portela de
description It was shown that the classic selection index, under multicollinearity, could not give simultaneous gains for wheat grain production and its primary components. This was due to the instability and, consequently, low precision of the coefficient index estimates. A modification of the prediction process of the index was proposed to avoid the adverse effects of multicollinearity, adopting a procedure based on ridge regression theory. The modified classic selection index, or ridge index, gave more statistically viable index coefficient estimates and gains for all of the characters evaluated. However, lower gains for number of grains per spike and grain yield were obtained, when compared to those obtained with selection for grain yield.
publishDate 1999
dc.date.none.fl_str_mv 1999-03-01
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=S1415-47571999000100021
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100021
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1415-47571999000100021
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 Genética
publisher.none.fl_str_mv Sociedade Brasileira de Genética
dc.source.none.fl_str_mv Genetics and Molecular Biology v.22 n.1 1999
reponame:Genetics and Molecular Biology
instname:Sociedade Brasileira de Genética (SBG)
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instname_str Sociedade Brasileira de Genética (SBG)
instacron_str SBG
institution SBG
reponame_str Genetics and Molecular Biology
collection Genetics and Molecular Biology
repository.name.fl_str_mv Genetics and Molecular Biology - Sociedade Brasileira de Genética (SBG)
repository.mail.fl_str_mv ||editor@gmb.org.br
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