Adjustments of error mean square in corn cultivar competition trials by Papadakis method

Detalhes bibliográficos
Autor(a) principal: Filho, Alberto Cargnelutti
Data de Publicação: 2003
Outros Autores: Storck, Lindolfo, Lúcio, Alessandro Dal'Col
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/6595
Resumo: The objective of this work was to evaluate the different ways to calculate the yield index, used as covariable for the Papadakis method, and to verify if this method is efficient to increase the experimental precision in corn (Zea mays L.) cultivars competition trials with high number of treatments. The following analysis was performed using grain yield data: mathematical model assumption, analysis of variance in the randomized complete block design (conventional analysis), and analysis of covariance in the completely random design using yield index as a covariable. The yield index covariable was estimated using five different variants of the Papadakis method. The comparisons between the conventional analysis and the Papadakis method was done with the mean square error, coefficient of variation, least significant differences of Tukey test, group numbers of Scott-Knott cluster analysis, and differentiation index of Fasoulas. Papadakis method improved the experimental precision from 10.5% to 48.1% in all different ways used to estimate index yield covariable. The four hills neighboring the reference hill was the best index to increase experimental precision.–
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spelling Adjustments of error mean square in corn cultivar competition trials by Papadakis methodAjustes de quadrado médio do erro em ensaios de competição de cultivares de milho pelo método de PapadakisZea mays; Fasoulas; experimental precisionZea mays; Fasoulas; precisão experimentalThe objective of this work was to evaluate the different ways to calculate the yield index, used as covariable for the Papadakis method, and to verify if this method is efficient to increase the experimental precision in corn (Zea mays L.) cultivars competition trials with high number of treatments. The following analysis was performed using grain yield data: mathematical model assumption, analysis of variance in the randomized complete block design (conventional analysis), and analysis of covariance in the completely random design using yield index as a covariable. The yield index covariable was estimated using five different variants of the Papadakis method. The comparisons between the conventional analysis and the Papadakis method was done with the mean square error, coefficient of variation, least significant differences of Tukey test, group numbers of Scott-Knott cluster analysis, and differentiation index of Fasoulas. Papadakis method improved the experimental precision from 10.5% to 48.1% in all different ways used to estimate index yield covariable. The four hills neighboring the reference hill was the best index to increase experimental precision.–O objetivo deste trabalho foi avaliar as diferentes formas de calcular o índice de produtividade, usado como covariável pelo método de Papadakis, e verificar se este método é eficiente para aumentar a precisão experimental nos ensaios de competição de cultivares de milho (Zea mays L.) com grande número de tratamentos. Em relação ao rendimento de grãos, procedeu-se a verificação das pressuposições do modelo matemático, a análise da variância no delineamento de blocos ao acaso e a análise de covariância no delineamento inteiramente casualizado, usando como covariável o índice de produtividade estimado por cinco formas (método de Papadakis). A comparação da análise convencional (blocos ao acaso) com a análise pelo método de Papadakis foi realizada com base nas estimativas do quadrado médio do erro, coeficiente de variação, diferença mínima significativa pelo teste de Tukey, número de grupos formados pelo teste de Scott-Knott e o índice de diferenciação de Fasoulas. O método de Papadakis melhorou a precisão experimental entre 10,5% e 48,1% em relação às diferentes formas de estimação da covariável índice de produtividade, mostrando que a vizinhança mais próxima (unidade experimental de referência e as quatro laterais) é a forma mais eficiente na redução do erro experimental.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFilho, Alberto CargneluttiStorck, LindolfoLúcio, Alessandro Dal'Col2003-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6595Pesquisa Agropecuaria Brasileira; v.38, n.4, abr. 2003; 467-473Pesquisa Agropecuária Brasileira; v.38, n.4, abr. 2003; 467-4731678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6595/3652info:eu-repo/semantics/openAccess2014-08-13T16:51:54Zoai:ojs.seer.sct.embrapa.br:article/6595Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-13T16:51:54Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Adjustments of error mean square in corn cultivar competition trials by Papadakis method
Ajustes de quadrado médio do erro em ensaios de competição de cultivares de milho pelo método de Papadakis
title Adjustments of error mean square in corn cultivar competition trials by Papadakis method
spellingShingle Adjustments of error mean square in corn cultivar competition trials by Papadakis method
Filho, Alberto Cargnelutti
Zea mays; Fasoulas; experimental precision
Zea mays; Fasoulas; precisão experimental
title_short Adjustments of error mean square in corn cultivar competition trials by Papadakis method
title_full Adjustments of error mean square in corn cultivar competition trials by Papadakis method
title_fullStr Adjustments of error mean square in corn cultivar competition trials by Papadakis method
title_full_unstemmed Adjustments of error mean square in corn cultivar competition trials by Papadakis method
title_sort Adjustments of error mean square in corn cultivar competition trials by Papadakis method
author Filho, Alberto Cargnelutti
author_facet Filho, Alberto Cargnelutti
Storck, Lindolfo
Lúcio, Alessandro Dal'Col
author_role author
author2 Storck, Lindolfo
Lúcio, Alessandro Dal'Col
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Filho, Alberto Cargnelutti
Storck, Lindolfo
Lúcio, Alessandro Dal'Col
dc.subject.por.fl_str_mv Zea mays; Fasoulas; experimental precision
Zea mays; Fasoulas; precisão experimental
topic Zea mays; Fasoulas; experimental precision
Zea mays; Fasoulas; precisão experimental
description The objective of this work was to evaluate the different ways to calculate the yield index, used as covariable for the Papadakis method, and to verify if this method is efficient to increase the experimental precision in corn (Zea mays L.) cultivars competition trials with high number of treatments. The following analysis was performed using grain yield data: mathematical model assumption, analysis of variance in the randomized complete block design (conventional analysis), and analysis of covariance in the completely random design using yield index as a covariable. The yield index covariable was estimated using five different variants of the Papadakis method. The comparisons between the conventional analysis and the Papadakis method was done with the mean square error, coefficient of variation, least significant differences of Tukey test, group numbers of Scott-Knott cluster analysis, and differentiation index of Fasoulas. Papadakis method improved the experimental precision from 10.5% to 48.1% in all different ways used to estimate index yield covariable. The four hills neighboring the reference hill was the best index to increase experimental precision.–
publishDate 2003
dc.date.none.fl_str_mv 2003-04-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6595
url https://seer.sct.embrapa.br/index.php/pab/article/view/6595
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6595/3652
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.38, n.4, abr. 2003; 467-473
Pesquisa Agropecuária Brasileira; v.38, n.4, abr. 2003; 467-473
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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