Genetic Analyses Suggest Separate Introductions of the Pine Pathogen Lecanosticta acicola Into Europe
| Autor: | Josef Janoušek, Libor Jankovský, Adam Konečný, Irene Barnes, José G. Marmolejo Monsivais, Michael J. Wingfield, Christian Stauffer |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Czech Plant Science European Social Fund Biology Vitality 03 medical and health sciences Ascomycota Botany Economic history media_common.cataloged_instance Cost action European union Mexico Phylogeny Plant Diseases media_common Geography Genetic Variation Lecanosticta acicola Bayes Theorem Genes Mating Type Fungal Guatemala Pinus language.human_language Europe Plant Leaves Pinus Scholarship Genetics Population 030104 developmental biology North America language Agronomy and Crop Science Microsatellite Repeats |
| Zdroj: | Phytopathology®. 106:1413-1425 |
| ISSN: | 1943-7684 0031-949X |
| DOI: | 10.1094/phyto-10-15-0271-r |
| Popis: | Lecanosticta acicola is a heterothallic ascomycete that causes brown spot needle blight on native and nonnative Pinus spp. in many regions of the world. In this study we investigated the origin of European L. acicola populations and estimated the level of random mating of the pathogen in affected areas. Part of the elongation factor 1-α gene was sequenced, 11 microsatellite regions were screened, and the mating type idiomorphs were determined for 201 isolates of L. acicola collected from three continents and 17 host species. The isolates from Mexico and Guatemala were unique, highly diverse and could represent cryptic species of Lecanosticta. The isolates from East Asia formed a uniform and discrete group. Two distinct populations were identified in both North America and Europe. Approximate Bayesian computation analyses strongly suggest independent introductions of two populations from North America into Europe. Microsatellite data and mating type distributions indicated random recombination in the populations of North America and Europe. Its intercontinental introduction can most likely be explained as a consequence of the movement of infected plant material. In contrast, the spread of L. acicola within Europe appears to be primarily due to conidial dispersion and probably also ascospore dissemination. |
| Databáze: | OpenAIRE |
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