Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance

Detalhes bibliográficos
Autor(a) principal: Martins, Paulo Roberto
Data de Publicação: 1999
Outros Autores: Parentoni, Sidney Netto, Lopes, Maurício Antônio, Paiva, Edilson
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/5515
Resumo: The objective of this work was to verify the efficiency of the relative seminal root length (RSRL) and net seminal root length (NSRL) as phenotypic indexes for aluminum tolerance in individual maize plants. Seedlings of Al tolerant and susceptible genotypes were grown in nutrient solution containing toxic level of Al for a period of seven days, after which the values of RSRL and NSRL were determined. The results obtained when mean values of RSRL and NSRL were utilized showed that both indexes were able to discriminate tolerant from susceptible maize genotypes. However, when individual values of RSRL and NSRL were utilized, some tolerant plants scored as susceptible ones were observed, showing that the phenotypic evaluation of individual plants by both indexes is subjected to significant errors, mainly in the characterization of susceptible plants. Therefore, in studies for quantitative traits loci (QTLs) mapping for Al tolerance in maize, where these indexes are used, the most appropriate is to use F3 families, where it is possible to obtain mean values for RSRL and NSRL and then utilize these means to represent the phenotypic values of the respective F2 plants.
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spelling Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum toleranceEficiência de índices fenotípicos de comprimento de raiz seminal na avaliação de plantas individuais de milho quanto a tolerância ao alumínionutrient solution; aluminum toxicity; seedlings evaluationsolução nutritiva; toxidez de alumínio; avaliação de plântulasThe objective of this work was to verify the efficiency of the relative seminal root length (RSRL) and net seminal root length (NSRL) as phenotypic indexes for aluminum tolerance in individual maize plants. Seedlings of Al tolerant and susceptible genotypes were grown in nutrient solution containing toxic level of Al for a period of seven days, after which the values of RSRL and NSRL were determined. The results obtained when mean values of RSRL and NSRL were utilized showed that both indexes were able to discriminate tolerant from susceptible maize genotypes. However, when individual values of RSRL and NSRL were utilized, some tolerant plants scored as susceptible ones were observed, showing that the phenotypic evaluation of individual plants by both indexes is subjected to significant errors, mainly in the characterization of susceptible plants. Therefore, in studies for quantitative traits loci (QTLs) mapping for Al tolerance in maize, where these indexes are used, the most appropriate is to use F3 families, where it is possible to obtain mean values for RSRL and NSRL and then utilize these means to represent the phenotypic values of the respective F2 plants.O objetivo deste trabalho foi testar a eficiência do comprimento relativo de raiz seminal (CRRS) e do comprimento líquido de raiz seminal (CLRS) como indicadores fenotípicos quanto à tolerância ao alumínio na avaliação de plantas individuais de milho. Plântulas de genótipos tolerantes e suscetíveis ao Al foram submetidas a solução nutritiva contendo nível tóxico deste elemento, por um período de sete dias, após o qual, determinaram-se os valores de CRRS e CLRS. Os resultados obtidos quando se utilizaram valores médios para CRRS e CLRS mostraram que ambos os índices foram capazes de discriminar com eficiência os materiais tolerantes dos suscetíveis. Entretanto, quando foram utilizados os valores de CRRS e CLRS obtidos a partir de plantas individuais, observou-se a existência de plantas tolerantes com valores típicos de plantas suscetíveis, o que indica que a avaliação fenotípica de plantas individuais pelos dois índices está sujeita a erros significativos, principalmente na caracterização de plantas suscetíveis. Portanto, em estudos para mapeamento de "quantitative trait loci" (QTLs) ligados à tolerância ao Al, nos quais utilizam-se estes índices fenotípicos, o mais apropriado é avaliar famílias F3, onde é possível obter valores médios para CRRS e CLRS e utilizar estas médias para representar os valores fenotípicos das respectivas plantas F2.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMartins, Paulo RobertoParentoni, Sidney NettoLopes, Maurício AntônioPaiva, Edilson1999-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5515Pesquisa Agropecuaria Brasileira; v.34, n.10, out. 1999; 1897-1904Pesquisa Agropecuária Brasileira; v.34, n.10, out. 1999; 1897-19041678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5515/2706info:eu-repo/semantics/openAccess2012-02-13T11:38:31Zoai:ojs.seer.sct.embrapa.br:article/5515Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-02-13T11:38:31Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
Eficiência de índices fenotípicos de comprimento de raiz seminal na avaliação de plantas individuais de milho quanto a tolerância ao alumínio
title Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
spellingShingle Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
Martins, Paulo Roberto
nutrient solution; aluminum toxicity; seedlings evaluation
solução nutritiva; toxidez de alumínio; avaliação de plântulas
title_short Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
title_full Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
title_fullStr Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
title_full_unstemmed Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
title_sort Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
author Martins, Paulo Roberto
author_facet Martins, Paulo Roberto
Parentoni, Sidney Netto
Lopes, Maurício Antônio
Paiva, Edilson
author_role author
author2 Parentoni, Sidney Netto
Lopes, Maurício Antônio
Paiva, Edilson
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Martins, Paulo Roberto
Parentoni, Sidney Netto
Lopes, Maurício Antônio
Paiva, Edilson
dc.subject.por.fl_str_mv nutrient solution; aluminum toxicity; seedlings evaluation
solução nutritiva; toxidez de alumínio; avaliação de plântulas
topic nutrient solution; aluminum toxicity; seedlings evaluation
solução nutritiva; toxidez de alumínio; avaliação de plântulas
description The objective of this work was to verify the efficiency of the relative seminal root length (RSRL) and net seminal root length (NSRL) as phenotypic indexes for aluminum tolerance in individual maize plants. Seedlings of Al tolerant and susceptible genotypes were grown in nutrient solution containing toxic level of Al for a period of seven days, after which the values of RSRL and NSRL were determined. The results obtained when mean values of RSRL and NSRL were utilized showed that both indexes were able to discriminate tolerant from susceptible maize genotypes. However, when individual values of RSRL and NSRL were utilized, some tolerant plants scored as susceptible ones were observed, showing that the phenotypic evaluation of individual plants by both indexes is subjected to significant errors, mainly in the characterization of susceptible plants. Therefore, in studies for quantitative traits loci (QTLs) mapping for Al tolerance in maize, where these indexes are used, the most appropriate is to use F3 families, where it is possible to obtain mean values for RSRL and NSRL and then utilize these means to represent the phenotypic values of the respective F2 plants.
publishDate 1999
dc.date.none.fl_str_mv 1999-10-01
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/5515
url https://seer.sct.embrapa.br/index.php/pab/article/view/5515
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/5515/2706
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.34, n.10, out. 1999; 1897-1904
Pesquisa Agropecuária Brasileira; v.34, n.10, out. 1999; 1897-1904
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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