Population Biology of Fagus crenata Blume : I. Demographic Genetic Differentiations of Lowland and Montane Populations in Toyama, Central Honshu, Japan(Population Biology)
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概要
- 論文の詳細を見る
Based on demographic genetic differentiations, six isolated small lowland populations and one continuous large montane population of the Siebold's beech forests (Fagus crenata) in Toyama Prefecture, Honshu, Japan, were examined using isozymes as genetic markers. The results of within- and among-population genetic variabilities revealed that all six lowland populations, which are fragmented and isolated from each other at present, showed significantly lower percentages of polymorphic loci (P) and lower mean numbers of alleles per locus (A) than the montane population. Fluctuations in allele frequencies were observed in lowland populations. Alleles that were rare in the montane population showed unexpectedly higher frequencies in some lowland populations. The mean FST value of the lowland populations (0.116) was significantly higher than that of the montane population in Tateyama (0.005) and several other populations analyzed. All these facts suggest that small isolated Siebold's beech populations remaining on the foothills in the lowlands of Toyama Prefecture have been exposed to climate shifts and strong human disturbances, which result in fragmentation and isolation of local populations. On the other hand, the large continuous montane population on Tateyama maintains a higher genetic variability, with genetic reshuffling within and among subpopulations. Spatial genetic localizations and the resulting changes in the size-class structure in lowland populations were also discussed in relation to the demographic changes.
- 種生物学会の論文
著者
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Kitamura K
Forestry And Forest Product Res. Inst. Dep. Agriculture Forestry And Fisheries Ibaraki Jpn
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Kitamura K
Forestry And Forest Products Research Institute
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Kitamura Keiko
Forestry And Forest Products Research Institute Department Of Agriculture Forestry And Fisheries
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KAWANO Shoichi
Department of Botany, Graduate School of Sience, Kyoto University
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OHKAWA TOMOSHI
Department of Botany, Graduate School of Science, Kyoto University
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Nagai Yukio
Kosugi Senior High School
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Ohkawa Tomoshi
Department Of Botany Graduate School Of Science Kyoto University
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Ohkawa Tomoshi
Department Of Biology Graduate School Of Science University Of The Ryukyus
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Kawano S
Department Of Botany Graduate School Of Science Kyoto University
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Kawano Shoichi
Department Of Botany Graduate School Of Science Kyoto University
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MASUDA JUNZO
Daiichi-Yakuhin Kogyo
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Masuda J
Daiichi-yakuhin Kogyo
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Kitamura Keiko
Forest Dynamics And Diversity Group Hokkaido Research Center Forestry And Forest Products Research I
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Kawano Shoichi
Department Of Botany Faculty Of Science Kyoto University
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Kawano Shoichi
Department Of Applied Physics Faculty Of Engineering Tohoku University
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MASUDA JUNZO
Daiichi Yakuhin Kougyou Co. Ltd
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