High sexual reproduction and limited contemporary dispersal in the ectomycorrhizal fungus Tricholoma scalpturatum : new insights from population genetics and spatial autocorrelation analysis

Abstract

Dispersal and establishment are fundamental processes influencing the response of species to environmental changes, and the long‐term persistence of populations. A previous study on the symbiotic ectomycorrhizal fungus Tricholoma scalpturatum revealed strong genetic differentiations between populations in Western Europe, suggesting restricted dispersal for this wind‐dispersed cosmopolitan fungus. Two distinct genetic groups (genetic groups 1 and 2), co‐occurring in some locations, were also identified and could correspond to cryptic species. In the present work, we examine the reproductive strategy and dispersal biology of the two T. scalpturatum 's genetic groups. Variable molecular markers (intersimple sequence repeats and intergenic spacer 2–restriction fragment length polymorphisms) and spatial autocorrelation analyses were used to examine fine‐scale patterns (

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