Evolution and Phytogeography of model plant Lotus japonicus in Japan

日本莲是日本一种野生发光的模式植物。自史前时代以来，它就被认为是归化的植物。对日本莲的全基因组DNA进行了分析，广泛发布了各种遗传信息。利用展示的微卫星标记，对日本荷花野生居群进行了分析。聚类分析表明，日本莲在地理上明显分为两个不同的类群。第一组为本州型，由北海道、本州、四国和九州的野生类群组成。至于另一个类群，南山型包含了南山岛的种群。很明显，这两种类型在基因上是不同的。由于从对马岛获得的种群也是本州型，因此日本的荷花可能有从南方向北迁移到西南诸岛的种群，也可能有从朝鲜半岛经对马岛向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.