Genetic Diversity in Colletotrichum gloeosporioides from Stylosanthes spp. at Centers of Origin and Utilization
| Autor: | Y. Kexian, C. R. Ramesh, M J d'A Charchar, P. L. Weeds, Celso Dornelas Fernandes, Sukumar Chakraborty, Segenet Kelemu |
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| Přispěvatelé: | Long Pocket Laboratories, University of Queensland, Universidade Estadual Paulista (Unesp), Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), IGFRI, CATAS, Ctro. Internacional de Agric. Trop. |
| Rok vydání: | 2003 |
| Předmět: |
Germplasm
Genetic diversity education.field_of_study Pathogen surveys Ecology Host (biology) Glomerella cingulata Population Fungi Population genetics Plant Science Stylosanthes Biology biology.organism_classification Center of origin Genetic marker Colletotrichum Anthracnose Myxogastria education Agronomy and Crop Science Random amplified polymorphic DNA |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1943-7684 0031-949X |
| DOI: | 10.1094/phyto.2003.93.2.176 |
| Popis: | Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:20:36Z No. of bitstreams: 0 Made available in DSpace on 2014-05-27T11:20:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-02-01 Using molecular markers, this work compares the genetic diversity in Colletotrichum gloeosporioides infecting species of the tropical forage legume Stylosanthes at the center of origin in Brazil and Colombia with that of Australia, China, and India, where Srylosanthes spp. have 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. Cmw. Sci./Indust. Res. Organization Plant Industry Long Pocket Laboratories, Indooroopilly, QLD Coop. Res. Ctr. for Trop. Plant P. University of Queensland, Brisbane, QLD EMBRAPA-CNPGC/UNESP-FCA, Botucatu-SP 18609-490 EMBRAPA-CPAC, Brasilia 73.3000 IGFRI, Dharwad 580005 CATAS, Danzhou 571737, Hainan Ctro. Internacional de Agric. Trop., Apartado Aéreo 6713, Cali EMBRAPA-CNPGC/UNESP-FCA, Botucatu-SP 18609-490 |
| Databáze: | OpenAIRE |
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