Phylogenetic analysis of the plants which experienced evolutionary radiation in East Asia

2013 Fiscal Year Final Research Report

• Project/Area Number: 22570097
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Kumamoto University
• Principal Investigator: SOEJIMA Akiko 熊本大学, 自然科学研究科, 教授 (00244674)
• Co-Investigator(Kenkyū-buntansha): HOSHI Yoshikazu 東海大学, 農学部, 准教授 (70332088)
• Project Period (FY): 2010-04-01 – 2013-03-31
• Keywords: 生物系統地理 / 倍数体進化 / 東アジア / 放散的種分化

Research Abstract

In Flora of China, they recognize one species and eleven varieties in the Aster ageratoides complex in China. However, our study proposes to marge them into about three taxa. On the other hand, we recognize six species and four varieties in Japan, which suggests that evolutionary radiation might have occurred rather in Japan. It is possible that the complicated landform of Japan blocked gene flow between populations and accelerated speciation, while continuous landscape in continent permitted more frequent gene flow so that the distribution area of a taxon could be wider in China.
Unfortunately, it is difficult do reveal phylogenetic relationship between the taxa of A. ageratoides complex because their genetic differentiation is too small to reconstruct a phylogenetic tree. But we consider the small genetic differentiation itself reflects the recent, rapid evolutionary radiation of this group.

Research Products

• [Remarks] 中国北部と南西部におけるシロヨメナ群の 形態と染色体数の観察結果についての細胞 地理学的な論文を準備中.その後,日本, 韓国,台湾,中国を含むシロヨメナ群全体 についての分類学的再検討の総合的な論文 を執筆する