| Project/Area Number |
15K14580
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Evolutionary biology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Nozaki Hisayoshi 東京大学, 大学院理学系研究科(理学部), 准教授 (40250104)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 雌雄同体 / 雌雄遺体 / ホモタリック / ヘテロタリック / OTOKOGI遺伝子 / 進化 / ボルボックス / 祖先状態再構成 / 雌雄胴体 / 雌雄異体 / 雌雄同体種 / 雌雄異体種 / MID遺伝子 / 性決定遺伝子 |
|---|
| Outline of Final Research Achievements |
Since the homothallic species Volvox africanus and the heterothallic species V. reticuliferus are closely related to each other, biological comparison of these species seemed fruitful for resolving evolution of homothallism/heterothallism in Volvox. The present research demonstrated the presence of MID/OTOKOGI ortholog in the homothallic species of Volvox for the first time. In addition, our analysis based on ancestral state reconstruction in the whole volvocine algae suggested that homothallism might have evolved from heterothallism in the ancestor of these two species. In conclusion, we proposed a hypotheses that homothallic V. fricanus might have evolved from male of the ancestral heterothallic species (Yamamnoto et al. 2017, PLoS ONE).
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