Genetic variability among <Emphasis Type="Italic">Pholiota aurivella</Emphasis> isolates from a small natural population |
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Authors: | Masaki Fukuda Yoshimi Mori Akiyoshi Yamada |
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Institution: | (1) Faculty of Agriculture, Shinshu University, Minamiminowa, Nagano 399-4598, Japan |
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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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Keywords: | Genetic variability Mating type Mitochondrial DNA genotype Pholiota aurivella Somatic incompatibility |
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