Covariance analysis to improve discrimination capacity in cultivars' corn trials

Detalhes bibliográficos
Autor(a) principal: Storck, Lindolfo
Data de Publicação: 2000
Outros Autores: Lopes, Sidinei José, Marques, Daniela Giffoni, Tisott, Cesar Augusto, Ros, Cesar Augusto da
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/5902
Resumo: The use of experimental techniques in order to increase trial precision is important to detect small yield gain in crops. The aim of this research was to evaluate the potential use of covariance analyses to increase trial precision. Data of grain yield and final plant population from 313 corn (Zea mays L.) cultivar trials were studied. The experiments were carried out under different environmental conditions of the state of Rio Grande do Sul, Brazil, from 1993 to 1996. An HD statistic to compare the precision for use and not use of the covariance analyses was developed. The HD is the amplitude among cultivar mean estimations divided by the LSD value of Tukey test. The highest HD value, the best trial precision is obtained, which permits to detect small differences between cultivars. It was verified that covariance analyses increased HD from 4.7 to 19.5 improving cultivar discrimination yields adjusted by the covariable final plant population.
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spelling Covariance analysis to improve discrimination capacity in cultivars' corn trialsAnálise de covariância para melhoria da capacidade de discriminação em ensaios de cultivares de milhoZea mays, grain yield, plant population, statistical analysisZea mays, rendimento de grãos, população de plantas, análises estatísticasThe use of experimental techniques in order to increase trial precision is important to detect small yield gain in crops. The aim of this research was to evaluate the potential use of covariance analyses to increase trial precision. Data of grain yield and final plant population from 313 corn (Zea mays L.) cultivar trials were studied. The experiments were carried out under different environmental conditions of the state of Rio Grande do Sul, Brazil, from 1993 to 1996. An HD statistic to compare the precision for use and not use of the covariance analyses was developed. The HD is the amplitude among cultivar mean estimations divided by the LSD value of Tukey test. The highest HD value, the best trial precision is obtained, which permits to detect small differences between cultivars. It was verified that covariance analyses increased HD from 4.7 to 19.5 improving cultivar discrimination yields adjusted by the covariable final plant population.O uso de técnicas experimentais visando à precisão em detectar diferenças no rendimento de grãos é muito importante. O objetivo deste trabalho foi verificar a viabilidade da análise da covariância, como forma de reduzir o erro experimental. Foram utilizados os dados de rendimento de grãos de milho (Zea mays L.) e da população final de plantas das unidades experimentais de 313 ensaios de competição de cultivares, conduzidos no Estado do Rio Grande do Sul nos anos de 1993/96. Para fins de comparação entre a precisão da análise com e sem o uso da covariância, criou-se uma estatística denominada HD, que é igual à amplitude entre as médias estimadas das cultivares, dividida pelo valor da diferença mínima significativa (DMS) do teste de Tukey. Quanto maior for o valor de HD, melhor será a qualidade do ensaio, por permitir melhor discriminação entre as cultivares. O uso da análise da covariância elevou a estatística HD de 4,7 para 19,5, e melhorou a discriminação entre as médias ajustadas pela covariável população final de plantas.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraStorck, LindolfoLopes, Sidinei JoséMarques, Daniela GiffoniTisott, Cesar AugustoRos, Cesar Augusto da2000-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5902Pesquisa Agropecuaria Brasileira; v.35, n.7, jul. 2000; 1311-1316Pesquisa Agropecuária Brasileira; v.35, n.7, jul. 2000; 1311-13161678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5902/3006info:eu-repo/semantics/openAccess2014-08-19T16:18:21Zoai:ojs.seer.sct.embrapa.br:article/5902Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-19T16:18:21Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Covariance analysis to improve discrimination capacity in cultivars' corn trials
Análise de covariância para melhoria da capacidade de discriminação em ensaios de cultivares de milho
title Covariance analysis to improve discrimination capacity in cultivars' corn trials
spellingShingle Covariance analysis to improve discrimination capacity in cultivars' corn trials
Storck, Lindolfo
Zea mays, grain yield, plant population, statistical analysis
Zea mays, rendimento de grãos, população de plantas, análises estatísticas
title_short Covariance analysis to improve discrimination capacity in cultivars' corn trials
title_full Covariance analysis to improve discrimination capacity in cultivars' corn trials
title_fullStr Covariance analysis to improve discrimination capacity in cultivars' corn trials
title_full_unstemmed Covariance analysis to improve discrimination capacity in cultivars' corn trials
title_sort Covariance analysis to improve discrimination capacity in cultivars' corn trials
author Storck, Lindolfo
author_facet Storck, Lindolfo
Lopes, Sidinei José
Marques, Daniela Giffoni
Tisott, Cesar Augusto
Ros, Cesar Augusto da
author_role author
author2 Lopes, Sidinei José
Marques, Daniela Giffoni
Tisott, Cesar Augusto
Ros, Cesar Augusto da
author2_role author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Storck, Lindolfo
Lopes, Sidinei José
Marques, Daniela Giffoni
Tisott, Cesar Augusto
Ros, Cesar Augusto da
dc.subject.por.fl_str_mv Zea mays, grain yield, plant population, statistical analysis
Zea mays, rendimento de grãos, população de plantas, análises estatísticas
topic Zea mays, grain yield, plant population, statistical analysis
Zea mays, rendimento de grãos, população de plantas, análises estatísticas
description The use of experimental techniques in order to increase trial precision is important to detect small yield gain in crops. The aim of this research was to evaluate the potential use of covariance analyses to increase trial precision. Data of grain yield and final plant population from 313 corn (Zea mays L.) cultivar trials were studied. The experiments were carried out under different environmental conditions of the state of Rio Grande do Sul, Brazil, from 1993 to 1996. An HD statistic to compare the precision for use and not use of the covariance analyses was developed. The HD is the amplitude among cultivar mean estimations divided by the LSD value of Tukey test. The highest HD value, the best trial precision is obtained, which permits to detect small differences between cultivars. It was verified that covariance analyses increased HD from 4.7 to 19.5 improving cultivar discrimination yields adjusted by the covariable final plant population.
publishDate 2000
dc.date.none.fl_str_mv 2000-07-01
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/5902
url https://seer.sct.embrapa.br/index.php/pab/article/view/5902
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/5902/3006
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.35, n.7, jul. 2000; 1311-1316
Pesquisa Agropecuária Brasileira; v.35, n.7, jul. 2000; 1311-1316
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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