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Genetic variability among Pholiota aurivella isolates from a small natural population

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Mycoscience

Abstract

Genetic differences between 36 Pholiota aurivella wild isolates collected from 13 decayed logs of Salicaceae trees distributed along about 1200 m of a streambed in a forest were characterized by somatic incompatibility and mating tests, and by restriction fragment length polymorphism (RFLP) analysis of mitochondrial DNA (mtDNA). There was a perfect correlation between somatic incompatibility and mating type groups, and isolates could be divided into 15 genets (genetically identical clones). Because the mtDNAs of the 36 wild isolates have 14 different EcoRI RFLP patterns, they likely originated from at least 14 distinct wild strains, indicating that multiple wild strains with distinct genetic compositions coexist in the forest investigated in this study. mtDNA variation of P. aurivella is apparently very high despite the close proximity of sample collection sites within the forest. The territories of single P. aurivella genets within a host log are apparently larger than other nonpathogenic wood-decaying basidiomycetes reported previously, such as Flammulina velutipes and Lentinula edodes.

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Authors and Affiliations

  1. Faculty of Agriculture, Shinshu University, Minamiminowa, Nagano, 399-4598, Japan

    Masaki Fukuda, Yoshimi Mori & Akiyoshi Yamada

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  1. Masaki Fukuda
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  2. Yoshimi Mori
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  3. Akiyoshi Yamada
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Correspondence to Masaki Fukuda.

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Fukuda, M., Mori, Y. & Yamada, A. Genetic variability among Pholiota aurivella isolates from a small natural population. Mycoscience 48, 381–387 (2007). https://doi.org/10.1007/s10267-007-0381-5

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