DUTECH, Cyril; LABBE, Frédéric; CAPDEVIELLE, Xavier; LUNG, Brigitte

doi:10.1016/j.funbio.2017.03.001

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DUTECH, Cyril
Biodiversité, Gènes & Communautés [BioGeCo]

LABBE, Frédéric
Biodiversité, Gènes & Communautés [BioGeCo]
Groningen Institute for Evolutionary Life Sciences [Groningen] [GELIFES]

CAPDEVIELLE, Xavier
Biodiversité, Gènes & Communautés [BioGeCo]

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Article de revue

Ce document a été publié dans

Fungal Biology. 2017, vol. 121, n° 6-7, p. 550-560

Elsevier

Résumé en anglais

Armillaria ostoyae (sometimes named Armillaria solidipes) is a fungal species causing root diseases in numerous coniferous forests of the northern hemisphere. The importance of sexual spores for the establishment of new disease centres remains unclear, particularly in the large maritime pine plantations of southwestern France. An analysis of the genetic diversity of a local fungal population distributed over 500 ha in this French forest showed genetic recombination between genotypes to be frequent, consistent with regular sexual reproduction within the population. The estimated spatial genetic structure displayed a significant pattern of isolation by distance, consistent with the dispersal of sexual spores mostly at the spatial scale studied. Using these genetic data, we inferred an effective density of reproductive individuals of 0.1-0.3 individuals/ha, and a second moment of parent-progeny dispersal distance of 130-800 m, compatible with the main models of fungal spore dispersal. These results contrast with those obtained for studies of A. ostoyae over larger spatial scales, suggesting that inferences about mean spore dispersal may be best performed at fine spatial scales (i.e. a few kilometres) for most fungal species.< Réduire

Mots clés

armillaria ostoyae

spore sexuée

pinus pinaster

génotype

diversité génétique

Mots clés en anglais

forest disease

isolation by distance

maritime pine

planted forest

population size

single nucleotide polymorphism

genêtic variation

DOI

http://dx.doi.org/10.1016/j.funbio.2017.03.001

Project ANR

Plateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur " - ANR-10-EQPX-0016

Origine

Importé de hal

Unités de recherche

BioGeCo (Biodiversité Gènes & Communautés) - UMR 1202