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 | Acesso ao texto completo restrito à biblioteca da Epagri-Sede. Para informações adicionais entre em contato com biblio@epagri.sc.gov.br. |
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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
05/05/2003 |
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Data da última atualização: |
05/05/2003 |
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Autoria: |
ARGENTA, G.; SILVA, P. R. F. da; RIZZARDI, M. A.; BARUFFI, M. J.; LOPES, M. C. B. |
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Título: |
Manejo do nitrogenio no milho em semeadura direta em sucessao a especies de cobertura de solo no inverno e em dois locais. II. - efeito sobre o rendimento de graos. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Ciencia Rural, Santa Maria, v.29, n.4, p.587-593, out./dez.1999. |
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Idioma: |
Português |
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Palavras-Chave: |
Cobertura do solo; Epoca de plantio; Milho; Nitrogenio. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00679naa a2200205 a 4500
001 1024595
005 2003-05-05
008 1999 bl uuuu u00u1 u #d
100 1 $aARGENTA, G.
245 $aManejo do nitrogenio no milho em semeadura direta em sucessao a especies de cobertura de solo no inverno e em dois locais. II. - efeito sobre o rendimento de graos.
260 $c1999
653 $aCobertura do solo
653 $aEpoca de plantio
653 $aMilho
653 $aNitrogenio
700 1 $aSILVA, P. R. F. da
700 1 $aRIZZARDI, M. A.
700 1 $aBARUFFI, M. J.
700 1 $aLOPES, M. C. B.
773 $tCiencia Rural, Santa Maria$gv.29, n.4, p.587-593, out./dez.1999.
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Epagri-Sede (Epagri-Sede) |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
22/09/2016 |
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Data da última atualização: |
22/09/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
D'ÁVILA, L. S.; LEHNER, M. S.; FILIPPI, M. C. C.; SCHEUERMANN, K. K.; PONTE, E. M. D. |
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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, p. 1-9, 2016. |
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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: |
Magnaporthe oryzae; Microsatellite; Oryza sativa; Population structure. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02287naa a2200217 a 4500
001 1125519
005 2016-09-22
008 2016 bl uuuu u00u1 u #d
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.
653 $aMagnaporthe oryzae
653 $aMicrosatellite
653 $aOryza sativa
653 $aPopulation structure
700 1 $aLEHNER, M. S.
700 1 $aFILIPPI, M. C. C.
700 1 $aSCHEUERMANN, K. K.
700 1 $aPONTE, E. M. D.
773 $tTropical Plant Pathology, Brasília, p. 1-9, 2016.
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