ArticleMolecular ecology2022
Temporal changes in pathogen diversity in a perennial plant-pathogen-hyperparasite system.
Article in Molecular ecology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 13 citations in OpenAlex.
- Systematic bias in malaria parasite relatedness estimation.G3 (Bethesda, Md.) · 2025Article
- An Inversion Polymorphism Under Balancing Selection, Involving Giant Mobile Elements, in an Invasive Fungal Pathogen.Molecular biology and evolution · 2025Article
- Spatiotemporal analysis of the structure and genetic diversity ofFrontiers in microbiology · 2025Article
- het-B allorecognition in Podospora anserina is determined by pseudo-allelic interaction of genes encoding a HET and lectin fold domain protein and a PII-like protein.PLoS genetics · 2024Article
- Molecular genetic variability ofFrontiers in microbiology · 2024Article
- Applying molecular and genetic methods to trees and their fungal communities.Applied microbiology and biotechnology · 2023Review
- Stepwise recombination suppression around the mating-type locus in an ascomycete fungus with self-fertile spores.PLoS genetics · 2023Article
- Microorganisms in biological control strategies to manage microbial plant pathogens: a review.Archives of microbiology · 2022Review
- Temporal changes in pathogen diversity in a perennial plant-pathogen-hyperparasite system.Molecular ecology · 2022Article
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Authors and funding
3 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hyperparasites can affect the evolution of pathosystems by influencing the stability of both pathogen and host populations. However, how pathogens of perennial hosts evolve in the presence of a hyperparasite has rarely been studied. Here, we investigated temporal changes in genetic diversity of the invasive chestnut blight pathogen Cryphonectria parasitica in the presence of its parasitic mycovirus Cryphonectria hypovirus 1 (CHV1). The virus reduces fungal virulence and represents an effective natural biocontrol agent against chestnut blight in Europe. We analysed genome-wide diversity and CHV1 prevalence in C. parasitica populations in southern Switzerland that were sampled twice at an interval of about 30 years. Overall, we found that both pathogen population structure and CHV1 prevalence were retained over time. The results suggest that recent bottlenecks have influenced the structure of C. parasitica populations in southern Switzerland. Strong balancing selection signals were found at a single vegetative incompatibility (vic) locus, consistent with negative frequency-dependent selection imposed by the vegetative incompatibility system. High levels of mating among related individuals (i.e., inbreeding) and genetic drift are probably at the origin of imbalanced allele ratios at vic loci and subsequently low vc type diversity. Virus infection rates were stable at ~30% over the study period and we found no significant impact of the virus on fungal population diversity. Consequently, the efficacy of CHV1-mediated biocontrol was probably retained.
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