Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening

Detalhes bibliográficos
Autor(a) principal: Maluf, Angela Maria
Data de Publicação: 2014
Outros Autores: Martins, Paulo Sodero, Maluf, Wilson Roberto
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/16058
Resumo: Due to the fact that multivariate analysis is less convenient than univariate analysis for the study of genetic parameters, a study was undertaken to establish which individual parameters (length of the aerial portion – Y1, length of the longest root - Y2, dry weight of the aerial portion – Y3 dry weight of Roots - Y4, length of the first leaf – Y5, number of lateral branches - Y6, dry weight of the aerial portion/dry weight of roots ratio - Y7, and cotyledon persistence - Y8), under which concentration of Al (0, 3, 6, 9 and 12 ppm), would lead to the classification of leucaena (Leucaena leucocephala (Lam.) de Wit) populations for AI tolerance showing highest similarity to that of the cluster analysis. Similarity between univariate and multivariate classifications was tested by aX2 test in 2 x 2 contingency tables. The highest similarities between these criteria were obtained for the parameters Y1, Y2, Y3, Y4 and Y8, under the concentrations of 6, 9 and 12 ppm. The variable Y8 appears to lead to the most consistant results in the discrimination of Al tolerance, besides being easily evaluated (visually) and permitting a non-destructive minimum handling evaluation.
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spelling Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screeningAvaliação de populações de leucena para tolerância ao alumínio III. Critérios para avaliação de tolerânciaLeucaena leucocephala; aluminum toxicity; nutrient solution; tropical legume; tropical pastureLeucaena leucocephala; toxidez de alumínio; solução nutritiva; leguminosa tropical; pastagem tropicalDue to the fact that multivariate analysis is less convenient than univariate analysis for the study of genetic parameters, a study was undertaken to establish which individual parameters (length of the aerial portion – Y1, length of the longest root - Y2, dry weight of the aerial portion – Y3 dry weight of Roots - Y4, length of the first leaf – Y5, number of lateral branches - Y6, dry weight of the aerial portion/dry weight of roots ratio - Y7, and cotyledon persistence - Y8), under which concentration of Al (0, 3, 6, 9 and 12 ppm), would lead to the classification of leucaena (Leucaena leucocephala (Lam.) de Wit) populations for AI tolerance showing highest similarity to that of the cluster analysis. Similarity between univariate and multivariate classifications was tested by aX2 test in 2 x 2 contingency tables. The highest similarities between these criteria were obtained for the parameters Y1, Y2, Y3, Y4 and Y8, under the concentrations of 6, 9 and 12 ppm. The variable Y8 appears to lead to the most consistant results in the discrimination of Al tolerance, besides being easily evaluated (visually) and permitting a non-destructive minimum handling evaluation.Pelo fato de ser a análise multivariada menos conveniente que a univariada para estudos genéticos de herança, procurou-se determinar quais dos parâmetros univariados, isoladamente (comprimento da parte aérea - Y1, comprimento da maior raiz - Y2, peso seco da parte aérea - Y3, peso seco das raízes Y4, comprimento da primeira folha - Y5, número de ramificações Y6, relação peso seco da parte aérea/peso seco das raízes Y7 - e persistência dos cotilédones - Y8), sob quais concentrações de Al (0, 3, 6, 9 e 12 ppm), levam à classificação mais concordante com a análise multivariada na discriminação da tolerância ao Al em populações de leucena. A concordância entre a classificação univariada e a multivariada foi verificada através do teste de X2 em tabelas de contingência 2 x 2. Verificou-se que a melhor concordância para os dois critérios foi obtida para as variáveis Y1, Y2, Y3, Y4 e Y8 nas concentrações de 6,9 e 12 ppm de Al. A variável Y8 parece ser a que leva a resultados mais consistentes na discriminação da tolerância ao Al, além de ter a vantagem de ser facilmente avaliada (visualmente) e de a avaliação ser não destrutiva e exigir pouco manuseio da planta.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMaluf, Angela MariaMartins, Paulo SoderoMaluf, Wilson Roberto2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16058Pesquisa Agropecuaria Brasileira; v.19, n.9, set. 1984; 1131-1134Pesquisa Agropecuária Brasileira; v.19, n.9, set. 1984; 1131-11341678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16058/10229info:eu-repo/semantics/openAccess2014-04-16T19:30:03Zoai:ojs.seer.sct.embrapa.br:article/16058Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:30:03Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
Avaliação de populações de leucena para tolerância ao alumínio III. Critérios para avaliação de tolerância
title Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
spellingShingle Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
Maluf, Angela Maria
Leucaena leucocephala; aluminum toxicity; nutrient solution; tropical legume; tropical pasture
Leucaena leucocephala; toxidez de alumínio; solução nutritiva; leguminosa tropical; pastagem tropical
title_short Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
title_full Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
title_fullStr Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
title_full_unstemmed Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
title_sort Evaluation of leucaena populations for tolerance to aluminum. III. Criteria for screening
author Maluf, Angela Maria
author_facet Maluf, Angela Maria
Martins, Paulo Sodero
Maluf, Wilson Roberto
author_role author
author2 Martins, Paulo Sodero
Maluf, Wilson Roberto
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Maluf, Angela Maria
Martins, Paulo Sodero
Maluf, Wilson Roberto
dc.subject.por.fl_str_mv Leucaena leucocephala; aluminum toxicity; nutrient solution; tropical legume; tropical pasture
Leucaena leucocephala; toxidez de alumínio; solução nutritiva; leguminosa tropical; pastagem tropical
topic Leucaena leucocephala; aluminum toxicity; nutrient solution; tropical legume; tropical pasture
Leucaena leucocephala; toxidez de alumínio; solução nutritiva; leguminosa tropical; pastagem tropical
description Due to the fact that multivariate analysis is less convenient than univariate analysis for the study of genetic parameters, a study was undertaken to establish which individual parameters (length of the aerial portion – Y1, length of the longest root - Y2, dry weight of the aerial portion – Y3 dry weight of Roots - Y4, length of the first leaf – Y5, number of lateral branches - Y6, dry weight of the aerial portion/dry weight of roots ratio - Y7, and cotyledon persistence - Y8), under which concentration of Al (0, 3, 6, 9 and 12 ppm), would lead to the classification of leucaena (Leucaena leucocephala (Lam.) de Wit) populations for AI tolerance showing highest similarity to that of the cluster analysis. Similarity between univariate and multivariate classifications was tested by aX2 test in 2 x 2 contingency tables. The highest similarities between these criteria were obtained for the parameters Y1, Y2, Y3, Y4 and Y8, under the concentrations of 6, 9 and 12 ppm. The variable Y8 appears to lead to the most consistant results in the discrimination of Al tolerance, besides being easily evaluated (visually) and permitting a non-destructive minimum handling evaluation.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-16
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/16058
url https://seer.sct.embrapa.br/index.php/pab/article/view/16058
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/16058/10229
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.19, n.9, set. 1984; 1131-1134
Pesquisa Agropecuária Brasileira; v.19, n.9, set. 1984; 1131-1134
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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