Resistance to lodging and culm breakage in tropical corn

Detalhes bibliográficos
Autor(a) principal: Gomes, Luiz Savelli
Data de Publicação: 2010
Outros Autores: Brandão, Afonso Maria, Brito, Césio Humberto de, Moraes, Daniele Ferreira de, Lopes, Maria Teresa Gomes
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/6073
Resumo: The objective of this work was to evaluate corn genotypes for resistance to lodging and to culm breakage and to describe a new method for evaluating these traits. Assays were carried out in randomized blocks, with 85 tropical genotypes of corn and four replicates in five localities. The force required to pull out the plant and to break the culm and the breaking angle of momentum were evaluated. The measurements were made with equipment developed specifically for this purpose. Variance analyses and the Scott-Knott test were carried out for the traits. The forces required to pull out the plant and break the culm, and the breaking angle for the culms were significantly interactive with the locality. The means varied from 49.43 to 76.03 kgf for the force required to pull out the plants, from 1.07 to 2.76 kgf for the force required to break the culm, and from 16.15 to 41.18º for the angle at the breakage of the culm. There is genetic variability for selection for resistance to lodging and culm breakage in tropical corn. The method described is efficient for evaluating and differentiating the genotypes.
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spelling Resistance to lodging and culm breakage in tropical cornResistência ao acamamento de plantas e ao quebramento do colmo em milho tropicalZea mays; genotypic evaluation; evaluation methodologyZea mays; avaliação de genótipo; metodologia de avaliaçãoThe objective of this work was to evaluate corn genotypes for resistance to lodging and to culm breakage and to describe a new method for evaluating these traits. Assays were carried out in randomized blocks, with 85 tropical genotypes of corn and four replicates in five localities. The force required to pull out the plant and to break the culm and the breaking angle of momentum were evaluated. The measurements were made with equipment developed specifically for this purpose. Variance analyses and the Scott-Knott test were carried out for the traits. The forces required to pull out the plant and break the culm, and the breaking angle for the culms were significantly interactive with the locality. The means varied from 49.43 to 76.03 kgf for the force required to pull out the plants, from 1.07 to 2.76 kgf for the force required to break the culm, and from 16.15 to 41.18º for the angle at the breakage of the culm. There is genetic variability for selection for resistance to lodging and culm breakage in tropical corn. The method described is efficient for evaluating and differentiating the genotypes.O objetivo deste trabalho foi avaliar genótipos de milho quanto à resistência ao acamamento e ao quebramento do colmo e apresentar metodologia para avaliar essas características. Os ensaios foram realizados em blocos ao acaso, com 85 genótipos tropicais de milho e quatro repetições, em cinco locais. Foram avaliadas: as forças necessárias para o arranquio da planta e para o quebramento do colmo e o ângulo no momento do quebramento. As medições foram realizadas com equipamentos desenvolvidos para essas finalidades. Foram realizadas análises de variância e teste de Scott-Knott quanto às características. As forças de arranquio da planta, de quebramento do colmo e ângulo no momento do quebramento do colmo interagiram significativamente com a localidade. As médias variaram de 49,43 a 76,03 kgf para a força de arranquio da planta, de 1,07 kgf a 2,76 kgf para força de quebramento do colmo, e de 16,15 a 41,18º para o ângulo de quebramento do colmo. Existe variabilidade genética para seleção quanto à resistência ao acamamento e ao quebramento do colmo em genótipos tropicais de milho. A metodologia apresentada é eficiente para a avaliação e discriminação de genótipos.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCNPqGomes, Luiz SavelliBrandão, Afonso MariaBrito, Césio Humberto deMoraes, Daniele Ferreira deLopes, Maria Teresa Gomes2010-12-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6073Pesquisa Agropecuaria Brasileira; v.45, n.2, fev. 2010; 140-145Pesquisa Agropecuária Brasileira; v.45, n.2, fev. 2010; 140-1451678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6073/5997https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/6073/3108info:eu-repo/semantics/openAccess2014-10-16T17:04:18Zoai:ojs.seer.sct.embrapa.br:article/6073Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-16T17:04:18Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Resistance to lodging and culm breakage in tropical corn
Resistência ao acamamento de plantas e ao quebramento do colmo em milho tropical
title Resistance to lodging and culm breakage in tropical corn
spellingShingle Resistance to lodging and culm breakage in tropical corn
Gomes, Luiz Savelli
Zea mays; genotypic evaluation; evaluation methodology
Zea mays; avaliação de genótipo; metodologia de avaliação
title_short Resistance to lodging and culm breakage in tropical corn
title_full Resistance to lodging and culm breakage in tropical corn
title_fullStr Resistance to lodging and culm breakage in tropical corn
title_full_unstemmed Resistance to lodging and culm breakage in tropical corn
title_sort Resistance to lodging and culm breakage in tropical corn
author Gomes, Luiz Savelli
author_facet Gomes, Luiz Savelli
Brandão, Afonso Maria
Brito, Césio Humberto de
Moraes, Daniele Ferreira de
Lopes, Maria Teresa Gomes
author_role author
author2 Brandão, Afonso Maria
Brito, Césio Humberto de
Moraes, Daniele Ferreira de
Lopes, Maria Teresa Gomes
author2_role author
author
author
author
dc.contributor.none.fl_str_mv
CNPq
dc.contributor.author.fl_str_mv Gomes, Luiz Savelli
Brandão, Afonso Maria
Brito, Césio Humberto de
Moraes, Daniele Ferreira de
Lopes, Maria Teresa Gomes
dc.subject.por.fl_str_mv Zea mays; genotypic evaluation; evaluation methodology
Zea mays; avaliação de genótipo; metodologia de avaliação
topic Zea mays; genotypic evaluation; evaluation methodology
Zea mays; avaliação de genótipo; metodologia de avaliação
description The objective of this work was to evaluate corn genotypes for resistance to lodging and to culm breakage and to describe a new method for evaluating these traits. Assays were carried out in randomized blocks, with 85 tropical genotypes of corn and four replicates in five localities. The force required to pull out the plant and to break the culm and the breaking angle of momentum were evaluated. The measurements were made with equipment developed specifically for this purpose. Variance analyses and the Scott-Knott test were carried out for the traits. The forces required to pull out the plant and break the culm, and the breaking angle for the culms were significantly interactive with the locality. The means varied from 49.43 to 76.03 kgf for the force required to pull out the plants, from 1.07 to 2.76 kgf for the force required to break the culm, and from 16.15 to 41.18º for the angle at the breakage of the culm. There is genetic variability for selection for resistance to lodging and culm breakage in tropical corn. The method described is efficient for evaluating and differentiating the genotypes.
publishDate 2010
dc.date.none.fl_str_mv 2010-12-30
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/6073
url https://seer.sct.embrapa.br/index.php/pab/article/view/6073
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/6073/5997
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/6073/3108
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.45, n.2, fev. 2010; 140-145
Pesquisa Agropecuária Brasileira; v.45, n.2, fev. 2010; 140-145
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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