Estimating gain by use of a classic selection index under multicollinearity in wheat (Triticum aestivum)
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
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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Genetics and Molecular Biology |
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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) instacron:SBG |
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 |
_version_ |
1752122377332850688 |