Variability of Pyricularia oryzae Cav. in irrigated rice genotypes
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Tropical (Online) |
Texto Completo: | https://revistas.ufg.br/pat/article/view/25853 |
Resumo: | Rice blast, caused by the fungus Pyricularia oryzae Cav., is one of the most important diseases of rice. The understanding of its different strains allows a more efficient breeding towards resistant cultivars. This work aimed to determine the variability of the fungus and the prevalence of strains in irrigated rice genotypes, to evaluate the reaction of near isogenic lines of CO 39 to the collected P. oryzae isolates and to identify rice genotypes having complementary resistance genes to these isolates. The study was performed with 36 P. oryzae isolates collected in 18 irrigated rice cultivars from four counties in Rio Grande do Sul State, Brazil. A total of 21 strains were identified, with a prevalence for the IA group strains, in all collection sites, especially the IA-1 strain. A resistance reaction was observed for the cultivars BRS Firmeza, Bluebelle, Te-tep and BRS 7 (Taim), while a susceptible reaction was observed for Fanny, Dawn, BRS Pelota and BRS Atalanta. The series of near isogenic lines obtained from the CO 39 cultivar showed resistance to the isolates in the following order: C101 A51 (resistant to all isolates); C101 PKT (12); C104PKT (11); C105HP4L23 (8); and C101-LAC (3). From the studied isolates, it was concluded that there is variability of P. oryzae, prevalence of the IA strain, a higher tolerance for the cultivar BRS Firmeza and that the Pi-2 gene confers resistance to rice blast in all isolates analyzed. |
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Variability of Pyricularia oryzae Cav. in irrigated rice genotypesVariabilidade de Pyricularia oryzae Cav. em genótipos de arrozOryza sativa L.Magnaporthe oryzaerice blastphysiologic strains.Oryza sativa L.Magnaporthe oryzaebrusoneraças fisiológicas.Rice blast, caused by the fungus Pyricularia oryzae Cav., is one of the most important diseases of rice. The understanding of its different strains allows a more efficient breeding towards resistant cultivars. This work aimed to determine the variability of the fungus and the prevalence of strains in irrigated rice genotypes, to evaluate the reaction of near isogenic lines of CO 39 to the collected P. oryzae isolates and to identify rice genotypes having complementary resistance genes to these isolates. The study was performed with 36 P. oryzae isolates collected in 18 irrigated rice cultivars from four counties in Rio Grande do Sul State, Brazil. A total of 21 strains were identified, with a prevalence for the IA group strains, in all collection sites, especially the IA-1 strain. A resistance reaction was observed for the cultivars BRS Firmeza, Bluebelle, Te-tep and BRS 7 (Taim), while a susceptible reaction was observed for Fanny, Dawn, BRS Pelota and BRS Atalanta. The series of near isogenic lines obtained from the CO 39 cultivar showed resistance to the isolates in the following order: C101 A51 (resistant to all isolates); C101 PKT (12); C104PKT (11); C105HP4L23 (8); and C101-LAC (3). From the studied isolates, it was concluded that there is variability of P. oryzae, prevalence of the IA strain, a higher tolerance for the cultivar BRS Firmeza and that the Pi-2 gene confers resistance to rice blast in all isolates analyzed.A brusone, causada pelo fungo Pyricularia oryzae Cav., é uma das mais importantes doenças da cultura do arroz. O conhecimento das raças do fungo permite direcionar o melhoramento genético, visando ao desenvolvimento de cultivares resistentes. Este trabalho objetivou determinar a variabilidade do fungo e a prevalência de raças, em genótipos de arroz irrigado; avaliar as reações das linhagens quase isogênicas de CO 39 aos isolados de P. oryzae; e identificar os genótipos de arroz que possuem genes complementares de resistência a estes isolados. O estudo foi realizado com 36 isolados de P. oryzae, coletados em 18 cultivares de arroz irrigado, em quatro municípios do Rio Grande do Sul. Foram identificadas 21 raças, ocorrendo maior frequência das raças do grupo IA, em todos os locais de coleta, destacando-se, dentre elas, a IA-1. Reação de resistência foi observada nas cultivares BRS Firmeza, Bluebelle, Te-tep e BRS 7 (Taim) e de susceptibilidade em Fanny, Dawn, BRS Pelota e BRS Atalanta. A série de linhagens quase isogênicas obtidas da cultivar CO 39 foi resistente aos isolados na seguinte ordem: C101 A51 (resistente para todos os isolados); C101 PKT (12); C104PKT (11); C105HP4L23 (8); e C101-LAC (3). A partir do estudo destes isolados, concluiu-se que há variabilidade de P. oryzae, prevalência da raça IA, maior tolerância da cultivar BRS Firmeza e que o gene Pi-2 confere resistência à brusone, em todos os isolados analisados.Escola de Agronomia - Universidade Federal de Goiás2014-08-26info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa Experimentalapplication/pdfhttps://revistas.ufg.br/pat/article/view/25853Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 44, n. 3, Jul./Sep. 2014; 263-270Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 44, n. 3, jul./set. 2014; 263-270Pesquisa Agropecuária Tropical; v. 44, n. 3, jul./set. 2014; 263-2701983-4063reponame:Pesquisa Agropecuária Tropical (Online)instname:Universidade Federal de Goiás (UFG)instacron:UFGporhttps://revistas.ufg.br/pat/article/view/25853/16866Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics)info:eu-repo/semantics/openAccessNunes, Cley Donizetti MartinsMota, Monalize SaleteCarvalho, Fernando Irajá Félix deOliveira, Antonio Costa de2020-07-10T16:42:43Zoai:ojs.revistas.ufg.br:article/25853Revistahttps://revistas.ufg.br/patPUBhttps://revistas.ufg.br/pat/oaiaseleguini.pat@gmail.com||mgoes@agro.ufg.br1983-40631517-6398opendoar:2020-07-10T16:42:43Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG)false |
dc.title.none.fl_str_mv |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes Variabilidade de Pyricularia oryzae Cav. em genótipos de arroz |
title |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes |
spellingShingle |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes Nunes, Cley Donizetti Martins Oryza sativa L. Magnaporthe oryzae rice blast physiologic strains. Oryza sativa L. Magnaporthe oryzae brusone raças fisiológicas. |
title_short |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes |
title_full |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes |
title_fullStr |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes |
title_full_unstemmed |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes |
title_sort |
Variability of Pyricularia oryzae Cav. in irrigated rice genotypes |
author |
Nunes, Cley Donizetti Martins |
author_facet |
Nunes, Cley Donizetti Martins Mota, Monalize Salete Carvalho, Fernando Irajá Félix de Oliveira, Antonio Costa de |
author_role |
author |
author2 |
Mota, Monalize Salete Carvalho, Fernando Irajá Félix de Oliveira, Antonio Costa de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Nunes, Cley Donizetti Martins Mota, Monalize Salete Carvalho, Fernando Irajá Félix de Oliveira, Antonio Costa de |
dc.subject.por.fl_str_mv |
Oryza sativa L. Magnaporthe oryzae rice blast physiologic strains. Oryza sativa L. Magnaporthe oryzae brusone raças fisiológicas. |
topic |
Oryza sativa L. Magnaporthe oryzae rice blast physiologic strains. Oryza sativa L. Magnaporthe oryzae brusone raças fisiológicas. |
description |
Rice blast, caused by the fungus Pyricularia oryzae Cav., is one of the most important diseases of rice. The understanding of its different strains allows a more efficient breeding towards resistant cultivars. This work aimed to determine the variability of the fungus and the prevalence of strains in irrigated rice genotypes, to evaluate the reaction of near isogenic lines of CO 39 to the collected P. oryzae isolates and to identify rice genotypes having complementary resistance genes to these isolates. The study was performed with 36 P. oryzae isolates collected in 18 irrigated rice cultivars from four counties in Rio Grande do Sul State, Brazil. A total of 21 strains were identified, with a prevalence for the IA group strains, in all collection sites, especially the IA-1 strain. A resistance reaction was observed for the cultivars BRS Firmeza, Bluebelle, Te-tep and BRS 7 (Taim), while a susceptible reaction was observed for Fanny, Dawn, BRS Pelota and BRS Atalanta. The series of near isogenic lines obtained from the CO 39 cultivar showed resistance to the isolates in the following order: C101 A51 (resistant to all isolates); C101 PKT (12); C104PKT (11); C105HP4L23 (8); and C101-LAC (3). From the studied isolates, it was concluded that there is variability of P. oryzae, prevalence of the IA strain, a higher tolerance for the cultivar BRS Firmeza and that the Pi-2 gene confers resistance to rice blast in all isolates analyzed. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-08-26 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa Experimental |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufg.br/pat/article/view/25853 |
url |
https://revistas.ufg.br/pat/article/view/25853 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufg.br/pat/article/view/25853/16866 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2020 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics) |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
publisher.none.fl_str_mv |
Escola de Agronomia - Universidade Federal de Goiás |
dc.source.none.fl_str_mv |
Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics]; v. 44, n. 3, Jul./Sep. 2014; 263-270 Pesquisa Agropecuária Tropical (Agricultural Research in the Tropics); v. 44, n. 3, jul./set. 2014; 263-270 Pesquisa Agropecuária Tropical; v. 44, n. 3, jul./set. 2014; 263-270 1983-4063 reponame:Pesquisa Agropecuária Tropical (Online) instname:Universidade Federal de Goiás (UFG) instacron:UFG |
instname_str |
Universidade Federal de Goiás (UFG) |
instacron_str |
UFG |
institution |
UFG |
reponame_str |
Pesquisa Agropecuária Tropical (Online) |
collection |
Pesquisa Agropecuária Tropical (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Tropical (Online) - Universidade Federal de Goiás (UFG) |
repository.mail.fl_str_mv |
aseleguini.pat@gmail.com||mgoes@agro.ufg.br |
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1789440241653776384 |