Studiy of adaptiogenesis with expansion of distribution of invasive alian species from Japan

本研究是一种生长在日本及周边地区野生的日本虎杖，将于19世纪后人工引种到西方。现在，日本虎杖及其近缘物种巨人虎杖和波西米亚虎杖已经成为入侵外来物种的一个问题。我们在日本、韩国和台湾的自然栖息地进行了大范围的调查。并对入侵地区英格兰和欧罗巴、北美东海岸和西海岸进行了采样。比较了叶绿体DNA的rbcL-accd区和核DNA的ITS区的DNA序列。叶绿体DNA的rbcL-ACCD区有5组，在核DNA的ITS区分为6组。欧洲和美国入侵的日本虎杖具有相同的rbcL-ACCD序列和ITS区。认为欧洲和美国入侵的日本虎杖都起源于日本(日本海岸区)。入侵的虎杖与来自日本的虎杖也有亲缘关系。

This research is a Japanese knotweed which grows wild in the Japan and its surrounding area, will be artificially introduced into the West after the 19th century. Now, Japanese knotweed and its allied species Giant knotweed, and Bohemian knotweed has been a problem as invasive alien species. We investigated in the wide area in the natural habitat, Japan, South Korea, and Taiwan. And also sampled invasion area England and Europa, East and West Coast of North America. We compared DNA sequence of rbcL-accD region of chloroplast DNA, and ITS region of nuclear DNA. There are 5 groups of rbcL-accD region of chloroplast DNA, and divide into 6 groups in ITS region of nuclear DNA. The both european and american invasive Japanese knotweed have same sequence of rbcL-accD and ITS region. It is considered that both European and American invasive Japanese knotweed are same origin from Japan (Japan sea side region). The invasive Giant knotweed is also related with Giant knotweed from Japan.