Genetic signatures of variation in population size in a native fungal pathogen after the recent massive plantation of its host tree.

ABSTRACT: Historical fluctuations in forests' distribution driven by past climate changes and anthropogenic activities can have large impacts on the demographic history of pathogens that have a long co-evolution history with these host trees. Using a population genetic approach, we investigated that hypothesis by reconstructing the demographic history of Armillaria ostoyae, one of the major pathogens of the maritime pine (Pinus pinaster), in the largest monospecific pine planted forest in Europe (south-western France). Genetic structure analyses and approximate Bayesian computation approaches revealed that a single pathogen population underwent a severe reduction in effective size (12 times lower) 1080-2080 generations ago, followed by an expansion (4 times higher) during the last 4 generations. The

SUBMITTER: Labbe F 

PROVIDER: S-EPMC5678000 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature