Evolution and Phytogeography of model plant Lotus japonicus in Japan

莲花是日本野生发光的模式植物。从史前时代起，它就被认为是归化植物。对莲花的全基因组DNA进行了分析，广泛发布了各种遗传信息。利用所展示的微卫星标记，对日本荷花野生种群进行了分析。聚类分析表明，日本莲花可分为两个地理位置不同的类群。第一类为本州型，由北海道、本州、四国岛和九州的野生类群组成；另一类为南海岛类，遗传差异较大。由于从对马岛获得的种群也是本州型，日本莲花可能有从南方北上南洋群岛的种群，以及从朝鲜半岛通过对马在本州各地进行分布扩张的种群。

Lotus japonicus is a model plant which glows wild in Japan. It is considered the naturalized plant since prehistoric times. Whole genomic DNA of Lotus japonicus was analysed, and various genetic information are released widely. We use the exhibited microsatellite marker, and analysed wild populations of Lotus japonicus in Japan. Cluster analysis showed that Lotus japonicus of Japan was clearly divided into two geographically different groups.The first group, Honshu type consisted of wildness groups of Hokkaido, Honshu, Shikoku, and Kyushu.As for another group, Nansei type containd the populations of Nansei islands.It became clear that both types differ genetically. Since the population obtained from Tsushima Island was also the Honshu type, it was possible that Lotus japonicus of Japan has the group which went Nansei islands north from the south, and the group which carried out distribution expansion in various parts of Honshu through Tsushima from the Korean Peninsula.