Efficiency of root length phenotypic index in the evaluation of individual maize plants for aluminum tolerance
Autor(a) principal: | |
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Data de Publicação: | 1999 |
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/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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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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1793416671616040960 |