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29. | | FERNANDES, C. D.; MARCHI, C. E.; BATISTA, M. V. Microflora fúngica de sementes de forrageiras tropicais irradiadas com cobalto. Tropical Plant Pathology, Brasília, DF, v. 34, p. S230, ago. 2009. Suplemento, ref. 774. Edição dos Resumos do XLII Congresso Brasileiro de Fitopatologia; Annual Meeting of the Brazilain Phytopathological Society, Rio de Janeiro, ago. 2009. Biblioteca(s): Embrapa Gado de Corte. |
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39. | | FERNANDES, C. D.; VERZIGNASSI, J. R.; AZAMBUJA, D. G. Reacao de acessos de Stylosanthes spp. a antracnose. Fitopatologia Brasileira, Brasilia, v. 26, p. 422, ago. 2001. Suplemento, ref. 588. Edicao de palestras e resumos do XXXIV Congresso Brasileiro de Fitopatologia, Sao Pedro, SP, ago. 2001. CNPGC. Biblioteca(s): Embrapa Gado de Corte. |
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40. | | FERNANDES, A. T. F.; FERNANDES, C. D.; CHAKRABORTY, S. Reacao de acessos de Stylosanthes spp. a antracnose. In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 32., 1999, Curitiba. Resumos. Fitopatologia Brasileira, Brasilia, v.24, supl., p.283, ago. 1999. Resumo 228. Biblioteca(s): Embrapa Gado de Corte. |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
13/03/1998 |
Data da última atualização: |
13/03/1998 |
Autoria: |
CHAKRABORTY, S.; PERROT, R.; CHARCHAR, M. J. D' A.; FERNANDES, C. D.; KELEMU, S. |
Título: |
Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. II. Genetic and pathogenic diversity in isolates of Colletotrichum gloeosporioides from eight species of Stylosanthes. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
Tropical Grasslands, Queensland, v.31, p.393-401, 1997. |
Idioma: |
Inglês |
Conteúdo: |
This work provides information on genetic and pathogenic variation in isolates of Colletotrichum gloeosporioides which cause anthracnose disease in many species of the tropical pasture legume, Stylosanthes. Isolates collected from species other than S. guianensis mainly from the centre of host-pathogen diversity in South America were studied using Random Amplified Polymorphic DNA (RAD) markers and differential virulence on a set of host differentials. A phenetic analysis of 90 isolates using RAPD markers showed a wide genetic diversity in the pathogen population. The genetic variation in the Australian population was very limited compared with that at the centre of diversity. A similar situation was detected for pathogenic variation in 69 isolates from Brazil, many of which showed higher severity on Australian cultivars and accessions. These include accessions and cultivars which are highly resistant to the Australian races of the pathogen. However, pathogenic diversity in the Brazilian population of C. gloeosporioides was only partly characterised due to the limited number of host differential used in this study. Attention needs to focus on the development and use of a more extensive range of host differentials. There was no strong relationship between genetic and virulence markers. Consequently, pathogenicity tests need to be conducted to answer the more practical questions such as the risk to current commercial cultivars from damaging races. Use of molecular markers will be useful to understand better the movement of pathogen populations between geographically isolated regions. Isolates used in this work have come mainly from regions where S. capitata and S. guianensis are endemic. Further isolate sampling from regions representing the native range of commercial species such as S. scabra and S. hamata will be necessary for a more comprehensive understanding of this diversity. MenosThis work provides information on genetic and pathogenic variation in isolates of Colletotrichum gloeosporioides which cause anthracnose disease in many species of the tropical pasture legume, Stylosanthes. Isolates collected from species other than S. guianensis mainly from the centre of host-pathogen diversity in South America were studied using Random Amplified Polymorphic DNA (RAD) markers and differential virulence on a set of host differentials. A phenetic analysis of 90 isolates using RAPD markers showed a wide genetic diversity in the pathogen population. The genetic variation in the Australian population was very limited compared with that at the centre of diversity. A similar situation was detected for pathogenic variation in 69 isolates from Brazil, many of which showed higher severity on Australian cultivars and accessions. These include accessions and cultivars which are highly resistant to the Australian races of the pathogen. However, pathogenic diversity in the Brazilian population of C. gloeosporioides was only partly characterised due to the limited number of host differential used in this study. Attention needs to focus on the development and use of a more extensive range of host differentials. There was no strong relationship between genetic and virulence markers. Consequently, pathogenicity tests need to be conducted to answer the more practical questions such as the risk to current commercial cultivars from damaging races. Use of molecular markers will... Mostrar Tudo |
Palavras-Chave: |
Anthracnosis; Brasil; Fungal diseases; Plant diseases. |
Thesagro: |
Antracnose; Biodiversidade; Cerrado; Colletotrichum Gloeosporioides; Doença de Planta; Fungo; Variação Genética. |
Thesaurus NAL: |
Africa; Asia; Australia; biodiversity; Brazil; Colombia; genetic variation; Stylosanthes. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03059naa a2200397 a 4500 001 1554108 005 1998-03-13 008 1997 bl --- 0-- u #d 100 1 $aCHAKRABORTY, S. 245 $aBiodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. II. Genetic and pathogenic diversity in isolates of Colletotrichum gloeosporioides from eight species of Stylosanthes. 260 $c1997 520 $aThis work provides information on genetic and pathogenic variation in isolates of Colletotrichum gloeosporioides which cause anthracnose disease in many species of the tropical pasture legume, Stylosanthes. Isolates collected from species other than S. guianensis mainly from the centre of host-pathogen diversity in South America were studied using Random Amplified Polymorphic DNA (RAD) markers and differential virulence on a set of host differentials. A phenetic analysis of 90 isolates using RAPD markers showed a wide genetic diversity in the pathogen population. The genetic variation in the Australian population was very limited compared with that at the centre of diversity. A similar situation was detected for pathogenic variation in 69 isolates from Brazil, many of which showed higher severity on Australian cultivars and accessions. These include accessions and cultivars which are highly resistant to the Australian races of the pathogen. However, pathogenic diversity in the Brazilian population of C. gloeosporioides was only partly characterised due to the limited number of host differential used in this study. Attention needs to focus on the development and use of a more extensive range of host differentials. There was no strong relationship between genetic and virulence markers. Consequently, pathogenicity tests need to be conducted to answer the more practical questions such as the risk to current commercial cultivars from damaging races. Use of molecular markers will be useful to understand better the movement of pathogen populations between geographically isolated regions. Isolates used in this work have come mainly from regions where S. capitata and S. guianensis are endemic. Further isolate sampling from regions representing the native range of commercial species such as S. scabra and S. hamata will be necessary for a more comprehensive understanding of this diversity. 650 $aAfrica 650 $aAsia 650 $aAustralia 650 $abiodiversity 650 $aBrazil 650 $aColombia 650 $agenetic variation 650 $aStylosanthes 650 $aAntracnose 650 $aBiodiversidade 650 $aCerrado 650 $aColletotrichum Gloeosporioides 650 $aDoença de Planta 650 $aFungo 650 $aVariação Genética 653 $aAnthracnosis 653 $aBrasil 653 $aFungal diseases 653 $aPlant diseases 700 1 $aPERROT, R. 700 1 $aCHARCHAR, M. J. D' A. 700 1 $aFERNANDES, C. D. 700 1 $aKELEMU, S. 773 $tTropical Grasslands, Queensland$gv.31, p.393-401, 1997.
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