Evolution of vegetative incompatibility in filamentous Ascomycetes: I. Deterministic models

M.J. Nauta*, Rolf F. Hoekstra

*Bijbehorende auteur voor dit werk

    OnderzoeksoutputAcademicpeer review

    38 Citaten (Scopus)


    In ascomycetes vegetative incompatibility can prevent the somatic exchange of genetic material between conspecifics. It must occur frequently in natural populations, since in all species studied many vegetative compatibility groups (VCGs) are found. Using a population-genetic approach, this paper explores two possible selective explanations for the evolution of vegetative incompatibility in asexual fungi: selection by a nuclear parasitic gene, and selection by a harmful cytoplasmic element. In a deterministic model, assuming a random spatial distribution of VCGs in an infinitely sized population, it is found that neither of these forms of frequency-dependent selection can explain the large number of VCGs found in nature. The selective pressure for more VCGs disappears once a limited number of VCGs exist, because the frequency of compatible interactions decreases when the number of VCGs increases. In comparing the two selective explanations, selection by a cytoplasmic element seems a more plausible explanation than selection by a nuclear gene.

    Originele taal-2English
    Pagina's (van-tot)979-995
    Aantal pagina's17
    Nummer van het tijdschrift4
    StatusPublished - aug.-1994

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