title: Characterization of subrepeat regions within rDNA intergenic spacers of the edible basidiomycete Lentinula edodes.
abstract: For 16 commercial cultivars of Lentinula edodes, DNA fragments for the nuclear rDNA intergenic spacers IGS1 and IGS2 were amplified and analyzed. IGS1 contained a subrepeat region, named SR1, and IGS2 contained a pair of direct repeats and a subrepeat region, named SR2. Three and five types of subrepeats were found in SR1 and SR2, respectively. Heterogeneity in the lengths of IGS1 and IGS2 arose mainly from the number of different kinds of subrepeats within SR1 and SR2. The DNA fingerprints from the PCR products targeting SR1 and SR2 were specific for each of the 16 cultivars, and had enough variation for discrimination among the cultivars. This result suggests that the DNA fingerprints targeting SR1 and SR2 are useful for investigations of L. edodes cultivars.
authors.affiliation: Department of Biological and Chemical Engineering, Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Saito
authors.forename: Norio
authors.initials: N
authors.lastname: Tanaka
authors.forename: Takao
authors.initials: T
authors.lastname: Shinozawa
mesh_terms: D016172:DNA Fingerprinting; D053938:DNA Fragmentation; D004274:DNA, Recombinant / Q000737:chemistry*; D004587:Electrophoresis, Agar Gel; D020074:Lentinula / Q000235:genetics*; D008969:Molecular Sequence Data; D012091:Repetitive Sequences, Nucleic Acid; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D004274:DNA, Recombinant