Covariance analysis to improve discrimination capacity in cultivars' corn trials
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , , , |
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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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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1793416710703808512 |