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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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| Registros recuperados : 128 | |
| 9. |  | SILVA, J. M. L. da; RODRIGUES, T. E.; VALENTE, M. A.; COSTA FILHA, C. L. Avaliação da aptidão agrícola das terras do Município de Acrelândia, Estado do Acre. Belém, PA: Embrapa Amazônia Oriental, 2002. 26 p. (Embrapa Amazônia Oriental. Documentos, 146). Anexo 5 mapas: Levantamento de reconhecimento de alta intensidade dos solos do Município de Acrelândia, Estado do Acre; Mapa de aptidão agrícola das terras do Município de Acrelândia, Estado do Acre; Mapa de potencialidade à mecanização...| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 15. | | WATRIN, O. dos S.; SANTOS, D. B. O.; VALENTE, M. A. Base de dados geográficos como subsídio à gestão territorial na fazenda experimental da Embrapa Amazônia Oriental, Belém, PA. Belém, PA: Embrapa Amazônia Oriental, 2011. 34 p. (Embrapa Amazônia Oriental. Boletim de pesquisa e desenvolvimento, 77). Anexo 4 mapas: Solos da Fazenda Experimental da Embrapa Amazônia Oriental, Belém, PA; Uso atual das terras da Fazenda Experimental da Embrapa Amazônia Oriental, Belém, PA; Restrição legal ao uso da terra da Fazenda Experimental da Embrapa...| Tipo: Boletim de Pesquisa e Desenvolvimento |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 16. | | RODRIGUES, T. E.; SILVA, J. M. L. da; OLIVEIRA JUNIOR, R. C. de; VALENTE, M. A. Algumas características de solos de mangue do litoral paraense. In: WORKSHOP ECOLAB, 3., 1995, Belém, PA. Livro de resumos expandidos. Belém, PA: UFPA: MPEG: SUDAM, 1995. p. 122. Programa de Estudos de Ecossistemas Costeiros Tropicais. Organização: Maria Emília da cruz Sales.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 18. | | SANTOS, P. L. dos; MARTINS, J. S.; VALENTE, M. A.; OLIVEIRA JUNIOR, R. C. de. Capacidade de troca de cations da fração argila em Latossolo amarelo de textura média e muito argilosa. In: CONGRESSO LATINO AMERICANO DE CIÊNCIA DO SOLO, 13.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 1.; SIMPÓSIO BRASILEIRO SOBRE MICROBIOLOGIA DO SOLO, 4.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 6.; REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 11., 1996, Aguas de Lindoia. Solo suelo 96. Aguas de Lindoia: SBCS/SLCS, 1996. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental; Embrapa Solos. |
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| 19. | | AMARAL, I. G.; RODRIGUES, T. E.; VALENTE, M. A.; OLIVEIRA JUNIOR, R. C. de. Características e organização de uma seqüência de solos na ilha de Algodoal - PA. In: WORKSHOP ECOLAB, 3., 1995, Belém, PA. Livro de resumos expandidos. Belém, PA: UFPA: MPEG: SUDAM, 1995. p. 118-120. Programa de Estudos de Ecossistemas Costeiros Tropicais. Organização: Maria Emília da cruz Sales.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 128 | |
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