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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
01/09/2004 |
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Data da última atualização: |
01/09/2004 |
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Autoria: |
WEEDS, P. L.; CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. d'A.; RAMESH, C. R.; KEXIAN, Y.; KELEMU, S. |
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Título: |
Genetic diversity in Colletotrichum gloeosporioides from Stylosanthes spp. at centers of origin and utilization. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Phytopathology, St. Paul, v. 93, n. 2, p. 176-185, 2003. |
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Idioma: |
Inglês |
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Conteúdo: |
Using molecular markers, this work compares the genetic diversity in Colletotrichum gloeosporioides infecting species of the tropical forage legume Stylosanthes at center of origin in Brazil and Colombia with that of Australia, China, and India, where Stylosanthes spp. been introduced for commercial use. There was extensive diversity in the pathogen population from Brazil, Colombia, China, and India. The Australian pathogen population was least diverse probably due to its geographical isolation and effective quarantine. The extensive diversity in China and India means that threats from exotic pathogen races to Stylosanthes pastures can potentially come from countries outside the South American center of origin. In Brazil and India, both with native Stylosanthes populations, a high level of genetic differentiation in the pathogen population was associated with sites where native or naturalized host population was widely distributed. There was limited genetic diversity at germplasm evaluation sites, with a large proportion of isolates having identical haplotypes. This contrasts recent pathogenicity results for 78 of the Brazilian isolates that show hot spots of complex races are more common around research stations where host germplasm are tested, but few are found at sites containing wild host populations. For a pathogen in which the same races arise convergently from different genetic backgrounds, this study highlights the importance of using both virulence and selectively neutral markers to understand pathogen population structure. MenosUsing molecular markers, this work compares the genetic diversity in Colletotrichum gloeosporioides infecting species of the tropical forage legume Stylosanthes at center of origin in Brazil and Colombia with that of Australia, China, and India, where Stylosanthes spp. been introduced for commercial use. There was extensive diversity in the pathogen population from Brazil, Colombia, China, and India. The Australian pathogen population was least diverse probably due to its geographical isolation and effective quarantine. The extensive diversity in China and India means that threats from exotic pathogen races to Stylosanthes pastures can potentially come from countries outside the South American center of origin. In Brazil and India, both with native Stylosanthes populations, a high level of genetic differentiation in the pathogen population was associated with sites where native or naturalized host population was widely distributed. There was limited genetic diversity at germplasm evaluation sites, with a large proportion of isolates having identical haplotypes. This contrasts recent pathogenicity results for 78 of the Brazilian isolates that show hot spots of complex races are more common around research stations where host germplasm are tested, but few are found at sites containing wild host populations. For a pathogen in which the same races arise convergently from different genetic backgrounds, this study highlights the importance of using both virulence and selectively n... Mostrar Tudo |
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Palavras-Chave: |
Randon Amplified Polymorphic DNA. |
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Thesagro: |
Antracnose; Colletotrichum Gloeosporioides; Doença de Planta; Leguminosa Forrageira; Patógeno; Variação Genética. |
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Thesaurus Nal: |
Stylosanthes. |
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Categoria do assunto: |
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Marc: |
LEADER 02422naa a2200289 a 4500
001 1567771
005 2004-09-01
008 2003 bl --- 0-- u #d
100 1 $aWEEDS, P. L.
245 $aGenetic diversity in Colletotrichum gloeosporioides from Stylosanthes spp. at centers of origin and utilization.
260 $c2003
520 $aUsing molecular markers, this work compares the genetic diversity in Colletotrichum gloeosporioides infecting species of the tropical forage legume Stylosanthes at center of origin in Brazil and Colombia with that of Australia, China, and India, where Stylosanthes spp. been introduced for commercial use. There was extensive diversity in the pathogen population from Brazil, Colombia, China, and India. The Australian pathogen population was least diverse probably due to its geographical isolation and effective quarantine. The extensive diversity in China and India means that threats from exotic pathogen races to Stylosanthes pastures can potentially come from countries outside the South American center of origin. In Brazil and India, both with native Stylosanthes populations, a high level of genetic differentiation in the pathogen population was associated with sites where native or naturalized host population was widely distributed. There was limited genetic diversity at germplasm evaluation sites, with a large proportion of isolates having identical haplotypes. This contrasts recent pathogenicity results for 78 of the Brazilian isolates that show hot spots of complex races are more common around research stations where host germplasm are tested, but few are found at sites containing wild host populations. For a pathogen in which the same races arise convergently from different genetic backgrounds, this study highlights the importance of using both virulence and selectively neutral markers to understand pathogen population structure.
650 $aStylosanthes
650 $aAntracnose
650 $aColletotrichum Gloeosporioides
650 $aDoença de Planta
650 $aLeguminosa Forrageira
650 $aPatógeno
650 $aVariação Genética
653 $aRandon Amplified Polymorphic DNA
700 1 $aCHAKRABORTY, S.
700 1 $aFERNANDES, C. D.
700 1 $aCHARCHAR, M. J. d'A.
700 1 $aRAMESH, C. R.
700 1 $aKEXIAN, Y.
700 1 $aKELEMU, S.
773 $tPhytopathology, St. Paul$gv. 93, n. 2, p. 176-185, 2003.
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Registro original: |
Embrapa Cerrados (CPAC) |
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| Registros recuperados : 5 | |
| 1. |  | WEEDS, P. CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J.; RAMESH; C. R.; GUODAO, L.; KELEMU, S. Genetic diversity i the anthracnose pathogen infecting Stylosanthes in Brazil, India and China. In: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, Sao Pedro, SP. Grassland ecosystems: an outlook into the 21st century: proceedings. Piracicaba: FEALQ, 2001. p. 232-234.| Biblioteca(s): Embrapa Cerrados. |
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| 2. | | WEEDS, P.; CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J.; RAMESH, C. R.; GUODAO, L.; KELEMU, S. Genetic diversity in the anthracnose pathogen infecting Stylosanthes in Brazil, India and China. In: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, Sao Pedro, SP. Proceedings... Piracicaba: FEALQ, 2001. p. 232-234.| Biblioteca(s): Embrapa Cerrados; Embrapa Gado de Corte. |
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| 3. | | WEEDS, P. L.; CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. d'A.; RAMESH, C. R.; KEXIAN, Y.; KELEMU, S. Genetic diversity in Colletotrichum gloeosporioides from Stylosanthes spp. at centers of origin and utilization. Phytopathology, St. Paul, v. 93, n. 2, p. 176-185, 2003.| Biblioteca(s): Embrapa Cerrados. |
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| 4. | | WHITE, N.; CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J.; MELKANIA, N. P.; RAMESH, C. R. GANGAIAH, B.; GUODAO, L.; CAMERON, D. F.; MILES, J. W. Selection of high yielding and anthracnose resistant Stylosanthes for Brazil, India and China. In: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, Sao Pedro, SP. Proceedings... Piracicaba: FEALQ, 2001. p. 234- 236.| Biblioteca(s): Embrapa Cerrados; Embrapa Gado de Corte. |
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| 5. | | WHITE, N. CHAKRABORTY, S.; FERNANDES, C. D.; CHARCHAR, M. J. MELKANIA, N. P.; RAMESH, C. R.; GANGAIAH, B.; GUODAO; L.; CAMERON, D. F.; MILES, J. W. Selection oh high yielding and anthracnose resistant Stylosanthes for Brazil, India and China. In: INTERNATIONAL GRASSLAND CONGRESS, 19., 2001, Sao Pedro, SP. Grassland ecosystems: an outlook into the 21st century: proceedings. Piracicaba: FEALQ, 2001. p. 234-236.| Biblioteca(s): Embrapa Cerrados. |
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| Registros recuperados : 5 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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