| Project/Area Number |
15K06933
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Conservation of biological resources
|
|---|
| 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)
|
|---|
| Research Collaborator |
NANAMI satoshi
MATSUYAMA shuhei
TONAKA misato
TE nueng
SAKAGUCHI atuko
YAMAGUCHI yoko
OGITA naoki
|
|---|
| Project Period (FY) |
2015-04-01 – 2019-03-31
|
| Project Status |
Completed (Fiscal Year 2018)
|
| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
|
|---|
| Keywords | 外来種 / 保全 / 進化 / 植物 / タンポポ / エピジェネティック変異 / 雑種形成 / 雑種 / 環境 / 生態学 |
|---|
| Outline of Final Research Achievements |
We studied the roles of trait plasticity, adaptive evolution, heritable epigenetics and hybridization during the expansion of an invasive apomictic dandelion, Taraxacum officinale. Individuals at the same latitude were genetically similar, and individuals at different latitudes showed different germination/flowering characteristics, suggesting that adaptive evolution is more important than trait plasticity. When individuals of the same clone were grown at high temperature, epigenetic mutations increased, and the mutations were transmitted to the next generation, indicating a possible contribution of epigenetic mutations. No evidence was obtained for hybridization to genetic population diversity as no differences were found in the genetic diversity of T. officinale and hybrid populations.
|
| Academic Significance and Societal Importance of the Research Achievements |
セイヨウタンポポは世界中に分布を広げた侵略的外来植物である。無性生殖で殖える侵略的外来植物はセイヨウタンポポ以外にも多いため、セイヨウタンポポの分布拡大メカニズムの解明は、外来植物の対策に有意義である。本研究で、前適応とエピジェネティック変異の両方がセイヨウタンポポの分布拡大に貢献している可能性が示唆された。雑種形成の影響は未確定だが、他の無性生殖の侵略的外来植物でも同様のメカニズムが働いている可能性があるため、さらに調査を進めて有効な分布拡大の制御方法につなげる必要があるだろう。
|
