Genetic diversity of the cacao pathogen Moniliophthora roreri (Cif.) Evans et al. in Tropical America
Moniliophthora roreri causes moniliasis os frosty pod disease, an extremely destructive pd rot of cacao in South and Central America and a permanent threat to cacao cultivation world-wide. In spite of the economic importance of this pathogen, several aspects of its basic biology remain unresolved, in particular those related to the level and distribution of its genetic diversity. Ninety-four isolates of M. roreri, collected throughout the natural and invasive range of the fungus, were studied to determine the level of molecular diversity of the species and to relate the information to the possible origin and biogeography of the pathogen. The study was carried out using two molecular techniques: AFLPand ISSR, and the results were compared. A significant genetic diversity of M. roreri was found. The highest level of genetic diversity was found in Colombia, where the fungus probably also originated. Five distinctive genetic groups were identified which show a particular geographic distribution. Origin and dispersal of these groups is discussed. Human activities appear to be the most important factors for the historical dispersal of the pathogen over long distances.
| Main Authors: | , , , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Published: |
Lagos (Nigeria): COPAL,
2004
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| Subjects: | THEOBROMA CACAO, MONILIOPHTHORA RORERI, DIVERSIDAD GENETICA, ORGANISMOS PATOGENOS, DISTRIBUCION GEOGRAFICA, AMERICA TROPICAL, |
| Online Access: | https://www.worldcocoafoundation.org/document/phillips-mora-w-krauss-u-evans-h-and-wilkinson-m-2005-genetic-diversity-of-the-cacao-pathogen-moniliophthora-roreri-cif-evans-et-al-in-tropical-america-diversidad-genetica-del-patogeno/ |
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