High variability in a mating type linked region in the dry rot fungus Serpula lacrymans caused by frequency-dependent selection?

  title={High variability in a mating type linked region in the dry rot fungus Serpula lacrymans caused by frequency-dependent selection?},
  author={Ingeborg Bjorvand Engh and Inger Skrede and Glenn-Peter S{\ae}tre and H{\aa}vard Kauserud},
  journal={BMC Genetics},
  pages={64 - 64}
BackgroundThe mating type loci that govern the mating process in fungi are thought to be influenced by negative frequency-dependent selection due to rare allele advantage. In this study we used a mating type linked DNA marker as a proxy to indirectly study the allelic richness and geographic distribution of mating types of one mating type locus (MAT A) in worldwide populations of the dry rot fungus Serpula lacrymans. This fungus, which causes serious destruction to wooden constructions in… 
Molecular Characterization of Sexual Diversity in a Population of Serpula lacrymans, a Tetrapolar Basidiomycete
It is argued that the low mating type diversity in the European S. lacrymans population restrains the dispersal and establishment of the fungus.
Extensive trans-specific polymorphism at the mating type locus of the root decay fungus Heterobasidion.
DNA sequences of homeodomain encoding genes at the MAT locus of five closely related species of the root rot basidiomycete Heterobasidion annosum sensu lato are used to show that the extended coalescence time of MAT alleles greatly predates speciation in the group.
Large-scale fungal strain sequencing unravels the molecular diversity in mating loci maintained by long-term balancing selection
The large number of sequenced strains highlighted the importance of sequencing multiple individuals from different species to detect the mating-related genes, the mechanisms generating diversity and the evolutionary forces maintaining them.
Long-term balancing selection in highly dynamic mating loci generates trans-species polymorphisms in fungi
The genetic diversity of mating in Trichaptum loci is due to long-term balancing selection that likely promote sexual outcrossing, with limited recombination and duplication activity.
Contrasting demographic histories revealed in two invasive populations of the dry rot fungus Serpula lacrymans
It is suggested that the dry rot fungus independently established in indoor environments in Europe and Japan and that invasive species can potentially establish large populations in new habitats based on a few colonizing individuals.
Mutualism and asexual reproduction influence recognition genes in a fungal symbiont.
Indoor Population Structure of The Dry Rot Fungus, Serpula lacrymans
The results show that the population structure of Serpula lacrymans within buildings within buildings and the distribution of MAT alleles within buildings vary greatly in terms of vegetative compatibility.


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The diversity and distribution of mating alleles in local populations of two litter decomposing mushroom species were investigated. The results from mating crosses between single-spore isolates were
The signature of balancing selection: fungal mating compatibility gene evolution.
A broadly applicable approach for detecting balancing selection is presented and applied to the b1 mating type gene in the mushroom fungus Coprinus cinereus and empirical data show that strong balancing selection has indeed occurred at the b 1 locus.
Evolution under tight linkage to mating type.
In response to the particular selection pressures associated with the maintenance of more than one mating type, this nucleus of low recombination may expand over evolutionary time, engulfing neighboring tracts bearing genes with no direct role in reproduction.
Two invasive populations of the dry rot fungus Serpula lacrymans show divergent population genetic structures
High genetic variation was observed within the Japanese population than within the European population, corresponding with the observed higher richness of vegetative compatibility types in Japan, indicating that there has been a higher level of gene flow from the Asian source populations to Japan than to Europe.
Analysis of Mating-Type Locus Organization and Synteny in Mushroom Fungi: Beyond Model Species
Although most of this chapter has focused on how conserved gene order can be used to clone MAT from nonmodel species, a more direct option is through PCR amplification of the MAT homologues themselves.
Ancient Trans-specific Polymorphism at Pheromone Receptor Genes in Basidiomycetes
The pheromone receptor alleles from Microbotryum appeared as the oldest, being at least 370 million years old, which represents the oldest known trans-specific polymorphism known in any organism so far.
Asian origin and rapid global spread of the destructive dry rot fungus Serpula lacrymans
It is shown that the dry rot fungus is divided into two main lineages; one nonaggressive residing naturally in North America and Asia (var. shastensis), and another aggressive lineage including specimens from all continents, both from natural environments and buildings ( var. lacrymans).
Mating type control of sexual development in Coprinus cinereus
Transformation studies with cloned genes suggest that a compatible mating is sensed by combinatorial interactions between an HD1 and HD2 protein and that the N-terminal regions of these proteins are implicated in the specificity of this interaction.