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Registro Completo |
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
08/09/2016 |
Data da última atualização: |
27/04/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
D'ÁVILA, L. S.; LEHNER, M. S.; FILIPPI, M. C. C.; SCHEUERMANN, K. K.; DEL PONTE, E. M. |
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. |
Título: |
Genetic structure and mating type analysis of the Pyricularia oryzae population causing widespread epidemics in southern Brazil. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Tropical Plant Pathology, Brasília, DF, v. 41, n. 6, p. 297-305, Oct. 2016. |
DOI: |
10.1007/s40858-016-0101-9 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Microsatelite. |
Thesagro: |
Arroz; Brusone; Doença de planta; Fungo; Oryza sativa; Pyricularia oryzae. |
Thesaurus Nal: |
Blast disease; Magnaporthe oryzae; Microsatellite repeats; Population structure. |
Categoria do assunto: |
H Saúde e Patologia |
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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Embrapa Arroz e Feijão (CNPAF) |
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1. | | D'ÁVILA, L. S.; LEHNER, M. S.; FILIPPI, M. C. C.; SCHEUERMANN, K. K.; DEL PONTE, E. M. Genetic structure and mating type analysis of the Pyricularia oryzae population causing widespread epidemics in southern Brazil. Tropical Plant Pathology, Brasília, DF, v. 41, n. 6, p. 297-305, Oct. 2016.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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