Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul

Detalhes bibliográficos
Autor(a) principal: Ribeiro, Alceu Sallaberry
Data de Publicação: 2014
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/16500
Resumo: A study was carried out with 124 isolares of the rice blast fungus (Pyricularia oryzae Cav.) which were obtained from 1969 to 1978 in order to determine the degree of variability within the fungus and study the occurrence and prevalence of physiologic races over the years. Based on reaction of the international rice differentials, 26 races were identified: IA-1, IA-5, IA-69, IA-85, IB-1, IB-5, IB-13, IB-21, IB-29, IB-37, IB-54, IB-63, IC-1, IC-5, IC-13, IC-21, IC-29, ID-5, ID-13, ID-16, IE-5, IF-1, IG-1, IG-2, IH-1 and II-1. Sub-races were registered in more than one isolate using additional set of local cultivars. The races IG-1, II-1, IH-1, IG-2, lA-5, IB-5 and IE-5 were more often encountered in the samples. However, the IG, IH, II and IB race groups were observed to be more frequent during 1969/1978. The physiologic races which were identified in this study showed some relationship with cultivars from which they were isolated. The existing races were found distributed all over the state. The disease reactions of the local rice cultivars to the rice blast were similar to the races of different groups, indicating, thereby, some pathogenic stability of the conidial population of P. oryzae in the environmental conditions of Rio Grande do Sul.
id EMBRAPA-4_9e68afd7ac8c09d954ad16eeefa68eac
oai_identifier_str oai:ojs.seer.sct.embrapa.br:article/16500
network_acronym_str EMBRAPA-4
network_name_str Pesquisa Agropecuária Brasileira (Online)
repository_id_str
spelling Prevalence of Pyricularia orvzae cav. races in Rio Grande do SulPrevalência de raças de Pyricularia oryzae cav. no Rio Grande do Sulrice; blast disease; race; variabilityarroz; bruzone; raças; variabilidadeA study was carried out with 124 isolares of the rice blast fungus (Pyricularia oryzae Cav.) which were obtained from 1969 to 1978 in order to determine the degree of variability within the fungus and study the occurrence and prevalence of physiologic races over the years. Based on reaction of the international rice differentials, 26 races were identified: IA-1, IA-5, IA-69, IA-85, IB-1, IB-5, IB-13, IB-21, IB-29, IB-37, IB-54, IB-63, IC-1, IC-5, IC-13, IC-21, IC-29, ID-5, ID-13, ID-16, IE-5, IF-1, IG-1, IG-2, IH-1 and II-1. Sub-races were registered in more than one isolate using additional set of local cultivars. The races IG-1, II-1, IH-1, IG-2, lA-5, IB-5 and IE-5 were more often encountered in the samples. However, the IG, IH, II and IB race groups were observed to be more frequent during 1969/1978. The physiologic races which were identified in this study showed some relationship with cultivars from which they were isolated. The existing races were found distributed all over the state. The disease reactions of the local rice cultivars to the rice blast were similar to the races of different groups, indicating, thereby, some pathogenic stability of the conidial population of P. oryzae in the environmental conditions of Rio Grande do Sul.Foi realizado um trabalho com 124 isolados de Pyricularia oryzae Cav., obtidos entre 1969 e 1978, com o objetivo de determinar a variabilidade do fungo e a prevalência de suas raças fisiológicas através dos anos. Pelas reações das cultivares de arroz da série internacional foram diferenciadas 26 raças: IA-1, IA-5, IA-69, IA-85, IB-1, IB-5, IB-13, IB-21, IB-29, IB-37, IB-54, IB-63, IC-1, IC-5, IC-13, IC-21, IC-29, ID-5, ID-13, ID-16, IE-5, IF-1, IG-1, IG-2, IH-1 e II-1. Usando-se algumas cultivares locais como diferenciais adicionadas à referida série, foram encontradas algumas sub-raças dentro daquelas raças que apareceram em mais de um isolado. As raças IG-1, II-1, IH-1, IG-2, IA-5, IB-5 e IE-5 foram as mais encontradas nas amostras estudadas. Contudo, as raças dos grupos IG, IH, II e IB foram as mais frequentes entre 1969 e 1978. Pelas cultivares de onde foram isoladas, notou-se que existiu alguma relação entre as raças fisiológicas de P. oryzae e genótipos de arroz. Observou-se também que as raças distribuíram-se na maioria das regiões do Estado. Por outro lado, as reações das cultivares locais foram semelhantes frente a raças de diferentes grupos. Consequentemente, essas reações talvez representem uma certa estabilidade patogênica da população do fungo nas condições do Rio Grande do Sul.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraRibeiro, Alceu Sallaberry2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16500Pesquisa Agropecuaria Brasileira; v.15, n.2, fev. 1980; 175-182Pesquisa Agropecuária Brasileira; v.15, n.2, fev. 1980; 175-1821678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16500/10783info:eu-repo/semantics/openAccess2014-04-15T19:32:15Zoai:ojs.seer.sct.embrapa.br:article/16500Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T19:32:15Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
Prevalência de raças de Pyricularia oryzae cav. no Rio Grande do Sul
title Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
spellingShingle Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
Ribeiro, Alceu Sallaberry
rice; blast disease; race; variability
arroz; bruzone; raças; variabilidade
title_short Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
title_full Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
title_fullStr Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
title_full_unstemmed Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
title_sort Prevalence of Pyricularia orvzae cav. races in Rio Grande do Sul
author Ribeiro, Alceu Sallaberry
author_facet Ribeiro, Alceu Sallaberry
author_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Ribeiro, Alceu Sallaberry
dc.subject.por.fl_str_mv rice; blast disease; race; variability
arroz; bruzone; raças; variabilidade
topic rice; blast disease; race; variability
arroz; bruzone; raças; variabilidade
description A study was carried out with 124 isolares of the rice blast fungus (Pyricularia oryzae Cav.) which were obtained from 1969 to 1978 in order to determine the degree of variability within the fungus and study the occurrence and prevalence of physiologic races over the years. Based on reaction of the international rice differentials, 26 races were identified: IA-1, IA-5, IA-69, IA-85, IB-1, IB-5, IB-13, IB-21, IB-29, IB-37, IB-54, IB-63, IC-1, IC-5, IC-13, IC-21, IC-29, ID-5, ID-13, ID-16, IE-5, IF-1, IG-1, IG-2, IH-1 and II-1. Sub-races were registered in more than one isolate using additional set of local cultivars. The races IG-1, II-1, IH-1, IG-2, lA-5, IB-5 and IE-5 were more often encountered in the samples. However, the IG, IH, II and IB race groups were observed to be more frequent during 1969/1978. The physiologic races which were identified in this study showed some relationship with cultivars from which they were isolated. The existing races were found distributed all over the state. The disease reactions of the local rice cultivars to the rice blast were similar to the races of different groups, indicating, thereby, some pathogenic stability of the conidial population of P. oryzae in the environmental conditions of Rio Grande do Sul.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-15
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/16500
url https://seer.sct.embrapa.br/index.php/pab/article/view/16500
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/16500/10783
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.15, n.2, fev. 1980; 175-182
Pesquisa Agropecuária Brasileira; v.15, n.2, fev. 1980; 175-182
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
_version_ 1793416694610264064

Registros relacionados