Abstract
The purpose of this paper is to realize phylogeography of Fagus hayatae and related species distributed in the region and set up database of the population genetic and refugee effects. Two Chloroplast DNA fragments (rbcL-atpB and trnL-trnF) and one mitochondria DNA fragment (nad7) were used in this study. Fagus hayatae was quiet similar to F. japonica and F. crenata of Japan morphologically and the habitats of Fagus hayatae were located on northern east of Taiwan, including N. Cha-tien Shan, Tong Shan and Da-bai Shan. Evidence showed that population differentiation between N. Cha-tien shan and Tong Shan populations had happened. Both of them revealed monophyletic patterns in Chloroplast DNA fragments (rbcL-atpB and trnL-trnF). It is interesting to find the dendrongram of F. crenata form Japan and F. engleriana and F. lucida , collected from Kew Botanic Gardens of U.K., appeared within the N. Cha-tien Shan population. F. crenata of Japan usually showed another monophyletic pattern. One suspected species of China also named “Fagus hayatae” is under examined by the same method to determine whether it is the same species as the Taiwanese origin. More sensitive tools such as AFLP and SSR will be tested for the study next year.