Evolution of eusociality mediated by the co-option of physiological mechanisms
| Project/Area Number |
26870121
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Animal physiology/Animal behavior
Ecology/Environment
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| Research Institution | The University of Tokyo |
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Principal Investigator |
OKADA Yasukazu 東京大学, 大学院総合文化研究科, 助教 (10638597)
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| Research Collaborator |
Mikheyev Alexander S.
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | カースト分化 / 分業 / 表現型可塑性 / 生態発生学 / 社会性昆虫 / 進化発生学 / インスリン経路 / 休眠 / 順位行動 / 高速シーケンサー / ドーパミン / 行動の生理基盤 / 順位構造 |
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| Outline of Final Research Achievements |
In this study, using a monomorphic queenless ant, Diacamma sp., we identified genes associated with monomorphic caste differentiation, specifically focusing on the onset of queen-worker differentiation. Using RNA-seq, qPCR and topical application of drugs, the study revealed 1) queen has heightened level of brain dopamine and this dopamine has gonadotropic neurohormonal effects, 2) genes involved in nutrition processing and storage, such as insulin-signaling genes and hexamerins, were strongly altered soon after dominance rank formation. These lines of evidence suggest that workers deploy physiological characteristics of diapause phase in solitary insects, so that they can reduce metabolic and reproductive activities.
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Report
(4 results)
Research Products
(19 results)
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[Journal Article] Ant circadian rhythms associated with brood care type.2017
Author(s)
Fujioka, H., Abe, M. S., Fuchikawa,T., Tsuji, K., Shimada, M., Okada, Y.
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Journal Title
Biology Letters
Volume: 13
Issue: 2
Pages: 20160743-20160743
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Queen contact and among-worker interactions dually suppress worker brain dopamine as a potential regulator of reproduction in an ant.2017
Author(s)
Shimoji, H., Aonuma,H., Miura, T., Tsuji, K., Sasaki, K., Okada, Y.
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Journal Title
Behavioral Ecology and Sociobiology
Volume: 71
Issue: 2
Pages: 35-35
DOI
Related Report
Peer Reviewed
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