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| Registros recuperados : 49 | |
| 6. |  | 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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| 8. | | 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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| 10. | | 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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| 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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| 16. | | 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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| 17. | | 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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| 18. | | 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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| 19. | | 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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| 20. | | 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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| Registros recuperados : 49 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
17/02/2003 |
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Data da última atualização: |
17/02/2003 |
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Autoria: |
CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. d'A.; THOMAS, M. R. |
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Título: |
Pathogenic variation in Colletotrichum gloeosporioides infecting stylosanthes spp. in a center of diversity in Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Ecology and Population Biology, v. 92, n. 5, p. 553-562, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Pathogenic variation in Colletotrichum gloeosporioides infecting species of the tropical pasture legume Stylosanthes at its center of diversity was determined from 296 isolates collected from wild host population and selected germ plasm of S. capitata, S. guianensis, S. scabra, and S. macrocephala in Brazil. A putative host differential set comprising 11 accessions was selected from a biossay of 18 isolates on 19 host accessions using principal component analysis. A similar analysis of anthracnose severity data for a subset of 195 isolates on the 11 differentials indicated that an adequate summary of pathogenic variation could be obtained using only five of these differentials. Of the five differentials. S- seabrana "Primar" was resistant and S. scabra "Fitzroy" was susceptible to most isolates. A cluster analysis was used to determine eight natural race clusters using the 195 isolates. Linear discriminant functions were developed of eight race clusters using the 195 isolates as the training data set, and these were applied tio classify a test data set of the remaining 101 isolates. All except 11 isolates of the test data set were classified into one of the eight race clusters. Over 10% of the 296 isolates were weakly pathogenic to all differentials and another 40% were virulent on just one differential. The unclassified isolates represent six new races with unique virulence combinations, of which one isolate is virulent on all five differentials. The majority of isolates came frm six field sites, and Shannon's index of diversity indicated considerable variation between sites. Pathogenic diversity was extensive at there sites where selected germ plasm were under evaluation, and complex race clusters and unclassified isolates representig new races were more prevalent at these sites compared with sites containing wild Stylosanthes populations. MenosPathogenic variation in Colletotrichum gloeosporioides infecting species of the tropical pasture legume Stylosanthes at its center of diversity was determined from 296 isolates collected from wild host population and selected germ plasm of S. capitata, S. guianensis, S. scabra, and S. macrocephala in Brazil. A putative host differential set comprising 11 accessions was selected from a biossay of 18 isolates on 19 host accessions using principal component analysis. A similar analysis of anthracnose severity data for a subset of 195 isolates on the 11 differentials indicated that an adequate summary of pathogenic variation could be obtained using only five of these differentials. Of the five differentials. S- seabrana "Primar" was resistant and S. scabra "Fitzroy" was susceptible to most isolates. A cluster analysis was used to determine eight natural race clusters using the 195 isolates. Linear discriminant functions were developed of eight race clusters using the 195 isolates as the training data set, and these were applied tio classify a test data set of the remaining 101 isolates. All except 11 isolates of the test data set were classified into one of the eight race clusters. Over 10% of the 296 isolates were weakly pathogenic to all differentials and another 40% were virulent on just one differential. The unclassified isolates represent six new races with unique virulence combinations, of which one isolate is virulent on all five differentials. The majority of isolates ca... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Patologia vegetal; Stilosante. |
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Thesagro: |
Cerrado; Colletotrichum Gloeosporioides; Distribuição Geográfica; Variação Genética. |
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Categoria do assunto: |
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Marc: |
LEADER 02614naa a2200241 a 4500
001 1566234
005 2003-02-17
008 2002 bl --- 0-- u #d
100 1 $aCHAKRABORTY, S.
245 $aPathogenic variation in Colletotrichum gloeosporioides infecting stylosanthes spp. in a center of diversity in Brazil.
260 $c2002
520 $aPathogenic variation in Colletotrichum gloeosporioides infecting species of the tropical pasture legume Stylosanthes at its center of diversity was determined from 296 isolates collected from wild host population and selected germ plasm of S. capitata, S. guianensis, S. scabra, and S. macrocephala in Brazil. A putative host differential set comprising 11 accessions was selected from a biossay of 18 isolates on 19 host accessions using principal component analysis. A similar analysis of anthracnose severity data for a subset of 195 isolates on the 11 differentials indicated that an adequate summary of pathogenic variation could be obtained using only five of these differentials. Of the five differentials. S- seabrana "Primar" was resistant and S. scabra "Fitzroy" was susceptible to most isolates. A cluster analysis was used to determine eight natural race clusters using the 195 isolates. Linear discriminant functions were developed of eight race clusters using the 195 isolates as the training data set, and these were applied tio classify a test data set of the remaining 101 isolates. All except 11 isolates of the test data set were classified into one of the eight race clusters. Over 10% of the 296 isolates were weakly pathogenic to all differentials and another 40% were virulent on just one differential. The unclassified isolates represent six new races with unique virulence combinations, of which one isolate is virulent on all five differentials. The majority of isolates came frm six field sites, and Shannon's index of diversity indicated considerable variation between sites. Pathogenic diversity was extensive at there sites where selected germ plasm were under evaluation, and complex race clusters and unclassified isolates representig new races were more prevalent at these sites compared with sites containing wild Stylosanthes populations.
650 $aCerrado
650 $aColletotrichum Gloeosporioides
650 $aDistribuição Geográfica
650 $aVariação Genética
653 $aBrasil
653 $aPatologia vegetal
653 $aStilosante
700 1 $aFERNANDES, C. D.
700 1 $aCHARCHAR, M. J. d'A.
700 1 $aTHOMAS, M. R.
773 $tEcology and Population Biology$gv. 92, n. 5, p. 553-562, 2002.
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