HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Genetic analysis reveals efficient sexual spore dispersal at a fine spatial scale in Armillaria ostoyae, the causal agent of root-rot disease in conifers

Abstract : 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.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-01608154
Contributor : Archive Ouverte Prodinra Connect in order to contact the contributor
Submitted on : Tuesday, October 3, 2017 - 12:42:19 AM
Last modification on : Friday, March 11, 2022 - 9:54:03 AM

Licence


Distributed under a Creative Commons Attribution - ShareAlike 4.0 International License

Links full text

Identifiers

Collections

Citation

Cyril Dutech, Frédéric Labbe, Xavier Capdevielle, Brigitte Lung. Genetic analysis reveals efficient sexual spore dispersal at a fine spatial scale in Armillaria ostoyae, the causal agent of root-rot disease in conifers. Fungal Biology, Elsevier, 2017, 121 (6-7), pp.550-560. ⟨10.1016/j.funbio.2017.03.001⟩. ⟨hal-01608154⟩

Share

Metrics

Record views

18