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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
08/09/2016 |
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Data da última atualização: |
27/04/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
D'ÁVILA, L. S.; LEHNER, M. S.; FILIPPI, M. C. C.; SCHEUERMANN, K. K.; DEL PONTE, E. M. |
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Afiliação: |
LEILANE S. D'AVILA, UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL, Porto Alegre-RS; MILLER S. LEHNER, UNIVERSIDADE FEDERAL DE VIÇOSA; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; KLAUS K. SCHEUERMANN, EPAGRI; EMERSON M. DEL PONTE, UNIVERSIDADE FEDERAL DE VIÇOSA. |
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Título: |
Genetic structure and mating type analysis of the Pyricularia oryzae population causing widespread epidemics in southern Brazil. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Tropical Plant Pathology, Brasília, DF, v. 41, n. 6, p. 297-305, Oct. 2016. |
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DOI: |
10.1007/s40858-016-0101-9 |
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Idioma: |
Inglês |
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Conteúdo: |
Blast is a major disease of rice in Brazil, the largest rice-producing country outside Asia. This study aimed to assess the genetic structure and mating-type frequency in a contemporary Pyricularia oryzae population, which caused widespread epidemics during the 2012/13 season in the Brazilian lowland subtropical region. Symptomatic leaves and panicles were sampled at flooded rice fields in the states of Rio Grande do Sul (RS, 34 fields) and Santa Catarina (SC, 21 fields). The polymorphism at ten simple sequence repeats (SSR or microsatellite) loci and the presence of MAT1-1 or MAT1-2 idiomorphs were assessed in a population comprised of 187 isolates. Only the MAT1-2 idiomorph was found and 162 genotypes were identified by the SSR analysis. A discriminant analysis of principal components (DAPC) of SSR data resolved four genetic groups, which were strongly associated with the cultivar of origin of the isolates. There was high level of genotypic diversity and moderate level of gene diversity regardless whether isolates were grouped in subpopulations based on geographic region, cultivar host or cultivar within region. While regional subpopulations were weakly differentiated, high genetic differentiation was found among subpopulations comprised of isolates from different cultivars. The data suggest that the rice blast pathogen population in southern Brazil is comprised of clonal lineages that are adapting to specific cultivar hosts. Farmers should avoid the use of susceptible cultivars over large areas and breeders should focus at enlarging the genetic basis of new cultivars. MenosBlast is a major disease of rice in Brazil, the largest rice-producing country outside Asia. This study aimed to assess the genetic structure and mating-type frequency in a contemporary Pyricularia oryzae population, which caused widespread epidemics during the 2012/13 season in the Brazilian lowland subtropical region. Symptomatic leaves and panicles were sampled at flooded rice fields in the states of Rio Grande do Sul (RS, 34 fields) and Santa Catarina (SC, 21 fields). The polymorphism at ten simple sequence repeats (SSR or microsatellite) loci and the presence of MAT1-1 or MAT1-2 idiomorphs were assessed in a population comprised of 187 isolates. Only the MAT1-2 idiomorph was found and 162 genotypes were identified by the SSR analysis. A discriminant analysis of principal components (DAPC) of SSR data resolved four genetic groups, which were strongly associated with the cultivar of origin of the isolates. There was high level of genotypic diversity and moderate level of gene diversity regardless whether isolates were grouped in subpopulations based on geographic region, cultivar host or cultivar within region. While regional subpopulations were weakly differentiated, high genetic differentiation was found among subpopulations comprised of isolates from different cultivars. The data suggest that the rice blast pathogen population in southern Brazil is comprised of clonal lineages that are adapting to specific cultivar hosts. Farmers should avoid the use of susceptible cul... Mostrar Tudo |
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Palavras-Chave: |
Microsatelite. |
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Thesagro: |
Arroz; Brusone; Doença de planta; Fungo; Oryza sativa; Pyricularia oryzae. |
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Thesaurus Nal: |
Blast disease; Magnaporthe oryzae; Microsatellite repeats; Population structure. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02566naa a2200313 a 4500
001 2052551
005 2020-04-27
008 2016 bl uuuu u00u1 u #d
024 7 $a10.1007/s40858-016-0101-9$2DOI
100 1 $aD'ÁVILA, L. S.
245 $aGenetic structure and mating type analysis of the Pyricularia oryzae population causing widespread epidemics in southern Brazil.$h[electronic resource]
260 $c2016
520 $aBlast is a major disease of rice in Brazil, the largest rice-producing country outside Asia. This study aimed to assess the genetic structure and mating-type frequency in a contemporary Pyricularia oryzae population, which caused widespread epidemics during the 2012/13 season in the Brazilian lowland subtropical region. Symptomatic leaves and panicles were sampled at flooded rice fields in the states of Rio Grande do Sul (RS, 34 fields) and Santa Catarina (SC, 21 fields). The polymorphism at ten simple sequence repeats (SSR or microsatellite) loci and the presence of MAT1-1 or MAT1-2 idiomorphs were assessed in a population comprised of 187 isolates. Only the MAT1-2 idiomorph was found and 162 genotypes were identified by the SSR analysis. A discriminant analysis of principal components (DAPC) of SSR data resolved four genetic groups, which were strongly associated with the cultivar of origin of the isolates. There was high level of genotypic diversity and moderate level of gene diversity regardless whether isolates were grouped in subpopulations based on geographic region, cultivar host or cultivar within region. While regional subpopulations were weakly differentiated, high genetic differentiation was found among subpopulations comprised of isolates from different cultivars. The data suggest that the rice blast pathogen population in southern Brazil is comprised of clonal lineages that are adapting to specific cultivar hosts. Farmers should avoid the use of susceptible cultivars over large areas and breeders should focus at enlarging the genetic basis of new cultivars.
650 $aBlast disease
650 $aMagnaporthe oryzae
650 $aMicrosatellite repeats
650 $aPopulation structure
650 $aArroz
650 $aBrusone
650 $aDoença de planta
650 $aFungo
650 $aOryza sativa
650 $aPyricularia oryzae
653 $aMicrosatelite
700 1 $aLEHNER, M. S.
700 1 $aFILIPPI, M. C. C.
700 1 $aSCHEUERMANN, K. K.
700 1 $aDEL PONTE, E. M.
773 $tTropical Plant Pathology, Brasília, DF$gv. 41, n. 6, p. 297-305, Oct. 2016.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
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URL |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
20/01/2006 |
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Data da última atualização: |
20/01/2006 |
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Autoria: |
KOENIGKAN, L. V.; CRUVINEL, P. E. |
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Título: |
Uma técnica baseada em análise de curvatura com processamento de imagens para o reconhecimento de aglomerados de gotas de chuva artificial. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE AGROINFORMÁTICA, 5.; SIMPÓSIO BRASILEIRO DE TECNOLOGIA DA INFORMAÇÃO NO AGRONEGÓCIO COOPERATIVO, 2., 2005, Londrina. Anais eletrônicos... Londrina: SBI-Agro, 2005. 1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
Apresenta técnica para o reconhecimento de aglomerados ou clusters de gotas, através da análise de curvatura. Tal técnica visa complemtar trabalhos que vem sendo desenvolvidos com o uso de processamento de imagens, desenvolvido em cooperação com o Departamento de Engenharia elétrica da EESC - USP. |
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Palavras-Chave: |
Análise de curvatura; Embrapa Instrumentação Agropecuária; Gota; Processamento de imagens. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01067naa a2200181 a 4500
001 1029269
005 2006-01-20
008 2005 bl --- 0-- u #d
100 1 $aKOENIGKAN, L. V.
245 $aUma técnica baseada em análise de curvatura com processamento de imagens para o reconhecimento de aglomerados de gotas de chuva artificial.
260 $c2005
520 $aApresenta técnica para o reconhecimento de aglomerados ou clusters de gotas, através da análise de curvatura. Tal técnica visa complemtar trabalhos que vem sendo desenvolvidos com o uso de processamento de imagens, desenvolvido em cooperação com o Departamento de Engenharia elétrica da EESC - USP.
653 $aAnálise de curvatura
653 $aEmbrapa Instrumentação Agropecuária
653 $aGota
653 $aProcessamento de imagens
700 1 $aCRUVINEL, P. E.
773 $tIn: CONGRESSO BRASILEIRO DE AGROINFORMÁTICA, 5.; SIMPÓSIO BRASILEIRO DE TECNOLOGIA DA INFORMAÇÃO NO AGRONEGÓCIO COOPERATIVO, 2., 2005, Londrina. Anais eletrônicos... Londrina: SBI-Agro, 2005. 1 CD-ROM.
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Embrapa Instrumentação (CNPDIA) |
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