Abstract
Restriction fragment length polymorphism (RFLP) analysis of mitochondrial DNAs (mtDNAs) from nine Japanese wild isolates of Phellinus linteus was carried out to examine their genetic variability. BamHI and EcoRI digests of mtDNAs from these isolates produced four and five distinct RFLP patterns, respectively. By combining the RFLP patterns obtained with the two endonucleases, mtDNAs from the nine isolates could be assigned to five different genotypes, but no mtDNA variation was detected among the isolates collected from a small area. Distance values calculated among all pairs of mtDNA genotypes, based on the presence or absence of comigrating restriction fragments, were clearly smaller than those among the mtDNA genotypes of Lentinula edodes and Pleurotus ostreatus samples collected worldwide, suggesting the necessity of collecting P. linteus wild isolates for genetic resources from geographically wider areas.
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