Genetic Analyses Suggest Separate Introductions of the Pine Pathogen Lecanosticta acicola Into Europe

• DOI: 10.1094/phyto-10-15-0271-r
• Publication Date: 2015-12-29T17:10:14Z
• Authors: Josef Janoušek; Michael J. Wingfield; José G. Marmolejo...; Libor Jankovský; Christian Stauffer; Adam Konečný; Irene Barnes
• Keywords: Heterothallic

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 origin European L. populations estimated level random mating pathogen affected areas. Part elongation factor 1-α gene was sequenced, 11 microsatellite were screened, type idiomorphs determined for 201 isolates collected from three continents 17 host species. The Mexico Guatemala unique, highly diverse could represent cryptic species Lecanosticta. East Asia formed uniform discrete group. Two distinct identified both North America Europe. Approximate Bayesian computation analyses strongly suggest independent introductions two into Microsatellite data distributions indicated recombination Its intercontinental introduction can most likely be explained as consequence movement infected plant material. contrast, spread within Europe appears to primarily due conidial dispersion probably also ascospore dissemination.