| Project/Area Number |
22570097
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Kumamoto University |
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Principal Investigator |
SOEJIMA Akiko 熊本大学, 自然科学研究科, 教授 (00244674)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHI Yoshikazu 東海大学, 農学部, 准教授 (70332088)
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 生物系統地理 / 倍数体進化 / 東アジア / 放散的種分化 / 種分化 / 細胞地理学 / 分子系統解析 / 東アジアフロラ / 国際情報交換 |
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| 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.
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