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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
13/03/1998 |
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Data da última atualização: |
13/03/1998 |
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Autoria: |
CHAKRABORTY, S.; PERROT, R.; CHARCHAR, M. J. D' A.; FERNANDES, C. D.; KELEMU, S. |
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Título: |
Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. II. Genetic and pathogenic diversity in isolates of Colletotrichum gloeosporioides from eight species of Stylosanthes. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Tropical Grasslands, Queensland, v.31, p.393-401, 1997. |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
Anthracnosis; Brasil; Fungal diseases; Plant diseases. |
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Thesagro: |
Antracnose; Biodiversidade; Cerrado; Colletotrichum Gloeosporioides; Doença de Planta; Fungo; Variação Genética. |
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Thesaurus Nal: |
Africa; Asia; Australia; biodiversity; Brazil; Colombia; genetic variation; Stylosanthes. |
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Categoria do assunto: |
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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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Embrapa Cerrados (CPAC) |
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| Registros recuperados : 40 | |
| 2. |  | CHAKRABORTY, S.; FERNANES, C. D.; CHARCHAR, M. J. Diversidade genetica do agente etiologico da antracnose de Stylosanthes no Brasil, India e China. In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 33., 2000, Belem. Fitopatologia Brasileira, Brasilia, v.25, supl., p.363, ago. 2000. Resumo 221. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 4. | | 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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| 6. | | FERNANDES, C. D.; VERZIGNASSI, J. R.; CHAKRABORTY, S. Resistencia de acessos de Stylosanthes spp. a antracnose. Fitopatologia Brasileira, Brasilia, v. 26, p. 422, ago. 2001. Suplemento, ref. 589. 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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| 8. | | CHAKRABORTY, S.; PERROT, R.; CHARCHAR, M. J. D`A.; FERNANDES, C. D.; KELEMU, S. Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. II. Genetic and pathogenic diversity in isolates of Colletotrichum gloeosporioides from eight species of Stylosanthes. Tropical Grasslands, Brisbane, v.31, n.5, p.393-401, Nov. 1997. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 9. | | CHAKRABORTY, S.; PERROT, R.; CHARCHAR, M. J. D' A.; FERNANDES, C. D.; KELEMU, S. Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. II. Genetic and pathogenic diversity in isolates of Colletotrichum gloeosporioides from eight species of Stylosanthes. Tropical Grasslands, Queensland, v.31, p.393-401, 1997.| Biblioteca(s): Embrapa Cerrados. |
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| 10. | | CAMERON, D. F.; CHARCHAR, M. J. D`A.; FERNANDES, C. D.; KELEMU, S.; CHAKRABORTY, S. Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. III. Field evaluation of Stylosanthes species for anthracnose resistance in their centre of diversity. Tropical Grasslands, Brisbane, v.31, n.5, p.402-407, Nov. 1997. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| 11. | | CAMERON, D. F.; CHARCHAR, M. J. D' A.; FERNANDES, C. D.; KELEMU, S.; CHAKRABORTY, S. Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. III. Field evaluation of Stylosanthes species for anthracnose resistance in their centre of diversity. Tropical Grasslands, Queensland, v. 31, p. 402-407, 1997.| Biblioteca(s): Embrapa Cerrados. |
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| 12. | | CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. D'A.; KELEMU, S.; CAMERON, D. F. Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. IV. Epidemiology of Stylosanthes anthracnose at the center of host-pathogen diversity. Tropical Grasslands, Brisbane, v.31, n.5, p.409-416, Nov. 1997.| Biblioteca(s): Embrapa Gado de Corte. |
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| 13. | | CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. D'A.; KELEMU, S.; CAMERON, D. F. Biodiversity, epidemiology and virulence of Colletotrichum gloeosporioides. IV. Epidemiology of Stylosanthes anthracnose at the centre of host-pathogen diversity. Tropical Grasslands, Queensland, v.31, p.408-416, 1997.| Biblioteca(s): Embrapa Cerrados. |
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| 14. | | CHARCHAR, M. J.; CHAKRABORTY, S.; ANJOS, J. R. N.; GOMES, A. C.; FERNANDES, C. D. Diversidade patogenica de isolados de Colletotrichum glosporioides em genotipos selecionados de Stylosanthes spp. In: CONGRESSO BRASILEIRO DE FITOPATOLOGIA, 32., 1999, Curitiba. Resumos. Fitopatologia Brasileira, Brasilia, v.24, supl., p.274, ago. 1999. Resumo 176.| Biblioteca(s): Embrapa Gado de Corte. |
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| 18. | | VERZIGNASSI, J. R.; FERNANDES, C. D.; CHARCHAR, M. J. A.; CHAKRABORTY, S. Variabilidade genetica de isolados de C. gloeosporioides, agente etiologico da antracnose em Stylosanthes spp. Fitopatologia Brasileira, Brasilia, v. 26, p. 423, ago. 2001. Suplemento, ref. 593. 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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| 20. | | CHAKRABORTY, S.; PERROT, R.; CHARCHAR, M. J. D'A.; FERNANDES, C. D.; KELEMU, S. Variation in the Stylosanthes anthracnose pathogen: implications for australian cultivars. In: INTERNATIONAL GRASSLAND CONGRESS, 18., 1997, Winnipeg, Saskatoon. Proceedings... [S.l.: s.n., 1997?]. p. 13-1 / 13-2. CNPGC.| Biblioteca(s): Embrapa Gado de Corte. |
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| Registros recuperados : 40 | |
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