BREUILLIN, Florence; DUTECH, Christian Cyril; ROBIN, Cécile

doi:10.1016/j.mycres.2005.09.016

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BREUILLIN, Florence
Biodiversité, Gènes et Ecosystèmes [BioGeCo]

DUTECH, Christian Cyril
Biodiversité, Gènes et Ecosystèmes [BioGeCo]

ROBIN, Cécile
Biodiversité, Gènes et Ecosystèmes [BioGeCo]

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Mycological Research. 2006, vol. 110, n° 3, p. 288-296

Elsevier

Résumé en anglais

Microsatellites are powerful markers to infer population genetic parameters. Here, 13 microsatellite loci isolated from a genomic and a cDNA library of Cryphonectria parasitica were used to characterize the genetic diversity and structure of four French populations. Twelve of these loci were polymorphic within populations, and average gene diversity (H,) was estimated to be 0.35. There was a lower genetic diversity in a south-eastern population relative to three south-western populations. In these three populations, microsatellite genotypic diversity was higher than vegetative compatibility type diversity. A high genetic differentiation (G(ST) = 0.27) suggested a low gene flow and/or founder effects of French populations which are in agreement with low dispersal of spores and different introductions of this species in southern France. This study demonstrates the significance of these microsatellite loci to assess gene flow and reproductive system in this important pathogen< Réduire

Mots clés en anglais

FOUNDER EFFECT

INTRODUCED SPECIES

INVASIVE SPECIES

PLANT PATHOLOGY

VEGETATIVE COMPATIBILITY

CRYPHONECTRIA PARASITICA

ESPECE INVASIVE

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Genetic diversity of the Chestnut blight fungus Cryphonectria parasitica in four French populations assessed by microsatellite markers

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