Comparison of species characteristics of Quercus serrata subsp. mongolicoides with those of Q. mongolica var. grosseserata and Q. serrata in Mt. Takahara, northern Kanto district
植物地理・分類学会 = The Society for the Study of Phytogeography and Taxonomy
抄録
We revised the taxonomic status of Quercus serrata subsp. mongolicoides (QSM) population occurring in hilly and lower mountainous regions of northern Kanto district. We conducted analysis of leaf morphology, genetic analysis and observation of leaf phenology for three congener species, QSM, Q. serrata (QS), and Q. mongolica var. grosseserrata (QMG). We set three sites, University forest at Funyu (S1), Kenminno-mori (S2) and Shojin-zawa (S3) in Mt. Takahara. Principal component analysis based on leaf morphological characters measured for the samples from the three sites showed that QSM and QMG apparently distinguished from QS. Genetic analysis including principal coordinates analysis, Bayesian clustering, and analysis of molecular variance using five loci of nuclear EST-SSR showed that QSM and QMG unambiguously distinguished from QS, but QSM and QMG were not discriminable from each other. Our observation of leaf phenology from the end of March to the middle of May in three years (2010-2012) in S1 and S2 indicated that QSM and QMG exhibited a similar pattern of the phenology and that their phenology progressed earlier than that observed in QS. Thus, we concluded that the QSM population in northern Kanto district should not be regarded as an intraspecific taxon of QS, but as intraspecific taxon of Q. mongolica, or intraspecific variation of QMG.
北関東高原山系におけるフモトミズナラの種特性とミズナラおよびコナラの種特性との比較
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