Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis
Autor(a) principal: | |
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Data de Publicação: | 2014 |
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/16004 |
Resumo: | This paper reports on the use of cluster analysis of euclidean distances (multivariate analysis) to screen for Al tolerance among 29 populations of leucaena (Leucaena leucocepbala (Lam.) de Wit.) tested under five different Al concentrations over two experiments. The multivariate analysis was applied to the standardized means of the variables Y1 to Y7 (length of the aerial portion, length of the longest root, dry weigth of the aerial portion, dry weight of roots, length of the first leaf, number of lateral branches, dry weight of the aerial portion/dry weight of roots ratio, respectively), under each of the five Al concentrations, and the populations were grouped in clusters according to their similarity by the use of Johnson's algorithm, performed by the CLUSTER procedure of the SAS package. The cluster analysis was able to discriminate two widely contrasting groups relatively to the traits under study. The populations T-1, T-2, T-3, T-6, T-7, T-13, T-14, T-15, T-17, T-19, T-20 , T-21, and T-30 were classified as AI tolerant, whereas T-4, T-5, T-8, T-9, T-10, T-11, T-12, T-16, T-18, T-22, T-23, T-24, T-25, T-26, T-28 and T-29 were classified as intolerant. |
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Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysisAvaliação de populações de leucena para tolerância ao alumínio. II. Análise de conglomeraçãoLeucaena leucocephala; aluminum toxicity; tropical legume; nutrient solution; tropical pasture; multivariate analysisLeucaena Ieucocephala; toxidez de alumínio; leguminosa tropical; solução nutritiva; pastagem tropical; análise multivariadaThis paper reports on the use of cluster analysis of euclidean distances (multivariate analysis) to screen for Al tolerance among 29 populations of leucaena (Leucaena leucocepbala (Lam.) de Wit.) tested under five different Al concentrations over two experiments. The multivariate analysis was applied to the standardized means of the variables Y1 to Y7 (length of the aerial portion, length of the longest root, dry weigth of the aerial portion, dry weight of roots, length of the first leaf, number of lateral branches, dry weight of the aerial portion/dry weight of roots ratio, respectively), under each of the five Al concentrations, and the populations were grouped in clusters according to their similarity by the use of Johnson's algorithm, performed by the CLUSTER procedure of the SAS package. The cluster analysis was able to discriminate two widely contrasting groups relatively to the traits under study. The populations T-1, T-2, T-3, T-6, T-7, T-13, T-14, T-15, T-17, T-19, T-20 , T-21, and T-30 were classified as AI tolerant, whereas T-4, T-5, T-8, T-9, T-10, T-11, T-12, T-16, T-18, T-22, T-23, T-24, T-25, T-26, T-28 and T-29 were classified as intolerant.O objetivo desse trabalho é discriminar, quanto à tolerância ao Al, 29 populações de leucena, Leucaena leucocephala (Lam) de Wit, testadas em cinco concentrações de alumínio, em dois experimentos, por meio da análise de conglomeração das distâncias euclideanas (análise multivariada). As médias padronizadas de cada população, em cada uma das cinco concentrações de Al, para as variáveis Y1 a Y7 (comprimento da parte aérea, comprimento da maior raiz, peso seco da parte aérea, peso seco das raízes, comprimento da primeira folha, número de ramificações e relação peso seco da parte aérea/peso seco das raízes, respectivamente), foi aplicada uma análise de conglomeração (análise multivariada), agrupando as populações mais semelhantes de acordo com o algoritmo de Johnson executado pelo procedimento CLUSTER do pacote estatístico SAS. A análise multivariada conseguiu identificar dois grupos bem contrastantes em relação às características estudadas. No grupo das tolerantes situaram-se as populações T-1, T-2, T-3, T-6, T-7, T-13, T-14, T-15, T-17, T-19, T-20, T-21 e T-30; e no das intolerantes, as populações T-4, T-5, T-8, T-9, T-10, T-11, T-12, T-16, T-18, T-22, T-23, T-24, T-25, T-26, T-28 e T-29.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraMaluf, Angela MariaMartins, Paulo SoderoFerreira-Rossi, Pedro EmílioMaluf, Wilson Roberto2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16004Pesquisa Agropecuaria Brasileira; v.19, n.8, ago. 1984; 999-1002Pesquisa Agropecuária Brasileira; v.19, n.8, ago. 1984; 999-10021678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16004/10148info:eu-repo/semantics/openAccess2014-04-16T19:26:20Zoai:ojs.seer.sct.embrapa.br:article/16004Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:26:20Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis Avaliação de populações de leucena para tolerância ao alumínio. II. Análise de conglomeração |
title |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis |
spellingShingle |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis Maluf, Angela Maria Leucaena leucocephala; aluminum toxicity; tropical legume; nutrient solution; tropical pasture; multivariate analysis Leucaena Ieucocephala; toxidez de alumínio; leguminosa tropical; solução nutritiva; pastagem tropical; análise multivariada |
title_short |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis |
title_full |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis |
title_fullStr |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis |
title_full_unstemmed |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis |
title_sort |
Evaluation of leucaena populations for tolerance to aluminum. II. Cluster analysis |
author |
Maluf, Angela Maria |
author_facet |
Maluf, Angela Maria Martins, Paulo Sodero Ferreira-Rossi, Pedro Emílio Maluf, Wilson Roberto |
author_role |
author |
author2 |
Martins, Paulo Sodero Ferreira-Rossi, Pedro Emílio Maluf, Wilson Roberto |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Maluf, Angela Maria Martins, Paulo Sodero Ferreira-Rossi, Pedro Emílio Maluf, Wilson Roberto |
dc.subject.por.fl_str_mv |
Leucaena leucocephala; aluminum toxicity; tropical legume; nutrient solution; tropical pasture; multivariate analysis Leucaena Ieucocephala; toxidez de alumínio; leguminosa tropical; solução nutritiva; pastagem tropical; análise multivariada |
topic |
Leucaena leucocephala; aluminum toxicity; tropical legume; nutrient solution; tropical pasture; multivariate analysis Leucaena Ieucocephala; toxidez de alumínio; leguminosa tropical; solução nutritiva; pastagem tropical; análise multivariada |
description |
This paper reports on the use of cluster analysis of euclidean distances (multivariate analysis) to screen for Al tolerance among 29 populations of leucaena (Leucaena leucocepbala (Lam.) de Wit.) tested under five different Al concentrations over two experiments. The multivariate analysis was applied to the standardized means of the variables Y1 to Y7 (length of the aerial portion, length of the longest root, dry weigth of the aerial portion, dry weight of roots, length of the first leaf, number of lateral branches, dry weight of the aerial portion/dry weight of roots ratio, respectively), under each of the five Al concentrations, and the populations were grouped in clusters according to their similarity by the use of Johnson's algorithm, performed by the CLUSTER procedure of the SAS package. The cluster analysis was able to discriminate two widely contrasting groups relatively to the traits under study. The populations T-1, T-2, T-3, T-6, T-7, T-13, T-14, T-15, T-17, T-19, T-20 , T-21, and T-30 were classified as AI tolerant, whereas T-4, T-5, T-8, T-9, T-10, T-11, T-12, T-16, T-18, T-22, T-23, T-24, T-25, T-26, T-28 and T-29 were classified as intolerant. |
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/16004 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16004 |
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/16004/10148 |
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.8, ago. 1984; 999-1002 Pesquisa Agropecuária Brasileira; v.19, n.8, ago. 1984; 999-1002 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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1793416672983384064 |