Estimating origin and expansion process of hybrid dandelions in Japan with genetic and ecological analysis

2014 Fiscal Year Final Research Report

• Project/Area Number: 24510330
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Resource conservation science
• Research Institution: Osaka City University
• Principal Investigator: ITOH Akira 大阪市立大学, 大学院理学研究科, 教授 (40274344)
• Co-Investigator(Kenkyū-buntansha): HIRAYAMA Daisuke 三重大学, 教育学部, 准教授 (00448755) ; MATSUYAMA Shuhei 大阪市立大学, 大学院理学研究科, 博士研究員 (30570048) ; NANAMI Satoshi 大阪市立大学, 大学院理学研究科, 准教授 (70326247)
• Research Collaborator: TONAKA Misato 大阪市立大学, 大学院理学研究科 ; TENUEN 大阪市立大学, 大学院理学研究科 ; MIYOSHI Kohei 大阪市立大学, 理学部 ; SUGAI Shota 大阪市立大学, 理学部 ; YOKOYAMA Ryosuke 大阪市立大学, 理学部
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 移入種 / 在来種保全 / 雑種 / タンポポ / 遺伝子汚染 / 葉緑体DNA / ハプロタイプネットワーク

Outline of Final Research Achievements

We studied origin and expansion process of hybrid dandelions in Japan with genetic analysis and cultivation experiment. We found unique cpDNA types to Taraxacum japonicum or other diploid native dandelions, indicating a possibility to use cpDNA for estimating origin of hybrids. We found only few hybrids that had unique cpDNA to T. japnicum. Proportion of hybrids in apparent exotic dandelions were higher in eastern than western Japan. The cultivation experiment showed that hybrids growing in different vegetation differed in cpDNA and growth features. These results suggest that difference in native dandelions that produced hybrids may influence the frequency, establishment and expansion of hybrid dandelions in Japan.

Free Research Field

植物生態学