Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Fitopatologia Brasileira |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000100001 |
Resumo: | The phenotypic diversity of Magnaporthe grisea was evaluated based on leaf samples with blast lesions collected from eight commercial fields of the upland rice cultivars 'BRS Primavera' and 'BRS Bonança', during the growing seasons of 2001/2002 and 2002/2003, in Goias State. The number of M. grisea isolates from each field utilized for virulence testing varied from 28 to 47. Three different indices were used based on reaction type in the eight standard international differentials and eight Brazilian differentials. The M. grisea subpopulations of ´Primavera' and 'Bonança', as measured by Simpson, Shannon and Gleason indices, showed similar phenotypic diversities. The Simpson index was more sensitive relation than those of Shannon and Gleason for pathotype number and standard deviation utilizing Brazilian differentials. However, the Gleason index was sensitive to standard deviation for international differentials. The sample size did not significantly influence the diversity index. The two sets of differential cultivars used in this study distinguished phenotypic diversity in different ways in all of the eight subpopulations analyzed. The phenotypic diversity determined based on eight differential Brazilian cultivars was lower in commercial rice fields of 'Primavera' than in the fields of 'Bonança,' independent of the diversity index utilized, year and location. Considering the Brazilian differentials, the four subpopulations of 'BRS Primavera' did not show evenness in distribution and only one pathotype dominated in the populations. The even distribution of pathotype was observed in three subpopulations of 'BRS Bonança'. The pathotype diversity of M. grisea was determined with more precision using Brazilian differentials and Simpson index. |
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Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivarsOryza sativaPyricularia griseapopulation dynamicsrice blastpathotypesvirulenceThe phenotypic diversity of Magnaporthe grisea was evaluated based on leaf samples with blast lesions collected from eight commercial fields of the upland rice cultivars 'BRS Primavera' and 'BRS Bonança', during the growing seasons of 2001/2002 and 2002/2003, in Goias State. The number of M. grisea isolates from each field utilized for virulence testing varied from 28 to 47. Three different indices were used based on reaction type in the eight standard international differentials and eight Brazilian differentials. The M. grisea subpopulations of ´Primavera' and 'Bonança', as measured by Simpson, Shannon and Gleason indices, showed similar phenotypic diversities. The Simpson index was more sensitive relation than those of Shannon and Gleason for pathotype number and standard deviation utilizing Brazilian differentials. However, the Gleason index was sensitive to standard deviation for international differentials. The sample size did not significantly influence the diversity index. The two sets of differential cultivars used in this study distinguished phenotypic diversity in different ways in all of the eight subpopulations analyzed. The phenotypic diversity determined based on eight differential Brazilian cultivars was lower in commercial rice fields of 'Primavera' than in the fields of 'Bonança,' independent of the diversity index utilized, year and location. Considering the Brazilian differentials, the four subpopulations of 'BRS Primavera' did not show evenness in distribution and only one pathotype dominated in the populations. The even distribution of pathotype was observed in three subpopulations of 'BRS Bonança'. The pathotype diversity of M. grisea was determined with more precision using Brazilian differentials and Simpson index.Sociedade Brasileira de Fitopatologia2007-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000100001Fitopatologia Brasileira v.32 n.1 2007reponame:Fitopatologia Brasileirainstname:Sociedade Brasileira de Fitopatologia (SBF)instacron:SBF10.1590/S0100-41582007000100001info:eu-repo/semantics/openAccessSilva,Gisele B.Zambolim,LaércioPrabhu,Anne S.Araújo,Leila G.Zimmermann,Francisco J.P.eng2007-04-12T00:00:00Zoai:scielo:S0100-41582007000100001Revistahttp://www.scielo.br/fbONGhttps://old.scielo.br/oai/scielo-oai.php||sbf-revista@ufla.br1678-46770100-4158opendoar:2007-04-12T00:00Fitopatologia Brasileira - Sociedade Brasileira de Fitopatologia (SBF)false |
dc.title.none.fl_str_mv |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
title |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
spellingShingle |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars Silva,Gisele B. Oryza sativa Pyricularia grisea population dynamics rice blast pathotypes virulence |
title_short |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
title_full |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
title_fullStr |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
title_full_unstemmed |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
title_sort |
Estimation of phenotypic diversity in field populations of Magnaporthe grisea from two upland rice cultivars |
author |
Silva,Gisele B. |
author_facet |
Silva,Gisele B. Zambolim,Laércio Prabhu,Anne S. Araújo,Leila G. Zimmermann,Francisco J.P. |
author_role |
author |
author2 |
Zambolim,Laércio Prabhu,Anne S. Araújo,Leila G. Zimmermann,Francisco J.P. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silva,Gisele B. Zambolim,Laércio Prabhu,Anne S. Araújo,Leila G. Zimmermann,Francisco J.P. |
dc.subject.por.fl_str_mv |
Oryza sativa Pyricularia grisea population dynamics rice blast pathotypes virulence |
topic |
Oryza sativa Pyricularia grisea population dynamics rice blast pathotypes virulence |
description |
The phenotypic diversity of Magnaporthe grisea was evaluated based on leaf samples with blast lesions collected from eight commercial fields of the upland rice cultivars 'BRS Primavera' and 'BRS Bonança', during the growing seasons of 2001/2002 and 2002/2003, in Goias State. The number of M. grisea isolates from each field utilized for virulence testing varied from 28 to 47. Three different indices were used based on reaction type in the eight standard international differentials and eight Brazilian differentials. The M. grisea subpopulations of ´Primavera' and 'Bonança', as measured by Simpson, Shannon and Gleason indices, showed similar phenotypic diversities. The Simpson index was more sensitive relation than those of Shannon and Gleason for pathotype number and standard deviation utilizing Brazilian differentials. However, the Gleason index was sensitive to standard deviation for international differentials. The sample size did not significantly influence the diversity index. The two sets of differential cultivars used in this study distinguished phenotypic diversity in different ways in all of the eight subpopulations analyzed. The phenotypic diversity determined based on eight differential Brazilian cultivars was lower in commercial rice fields of 'Primavera' than in the fields of 'Bonança,' independent of the diversity index utilized, year and location. Considering the Brazilian differentials, the four subpopulations of 'BRS Primavera' did not show evenness in distribution and only one pathotype dominated in the populations. The even distribution of pathotype was observed in three subpopulations of 'BRS Bonança'. The pathotype diversity of M. grisea was determined with more precision using Brazilian differentials and Simpson index. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000100001 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582007000100001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-41582007000100001 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Fitopatologia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Fitopatologia |
dc.source.none.fl_str_mv |
Fitopatologia Brasileira v.32 n.1 2007 reponame:Fitopatologia Brasileira instname:Sociedade Brasileira de Fitopatologia (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Fitopatologia (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Fitopatologia Brasileira |
collection |
Fitopatologia Brasileira |
repository.name.fl_str_mv |
Fitopatologia Brasileira - Sociedade Brasileira de Fitopatologia (SBF) |
repository.mail.fl_str_mv |
||sbf-revista@ufla.br |
_version_ |
1754734650944651264 |