Researches on ecology, genetics and tree improvement of temperate and boreal tree species correspondent to global warming.

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We investigated on the change of forest vegetation corresponding to the climate zone sifting which will be caused by the global warming. And also investigated on the method for maintenance of such forest ecosystems. We conducted systematic investigation on I ; gene conservation, II ; genetic variation concerning to the physiological and ecological features, III ; population genetics, IV ; estimation of adaptability to the new environment, V ; selection of adaptable races to the environmental change especially on the species of Pinaceae, Betulaceae, Fagaceae.Main actual researches are as follows ;1.Regeneration system and genetic variation of Picea polita forest.2.Hybrid formation among Quercus species.3.Classification of Larix species by using DNA analysis.4.Classification of Betula species by using DNA analysis.5.Genetic variation among populations of Fagus crenata in western Japan.As the result, we could obtain the inflammations on species feature and genetic variation of main species of Pinacea, Betulaceae, Fagaceae. We could also collect important gene resources for the further development of eco-physiological study on global warming.