Evolutionary genetic basis of divergence in androgen-dependent male mating strategy of threespine stickleback
| Project/Area Number |
15K07195
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Fukui Prefectural University |
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Principal Investigator |
Kokita Tomoyuki 福井県立大学, 海洋生物資源学部, 准教授 (60372835)
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| Project Period (FY) |
2015-10-21 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 生態ゲノミクス / 行動生態学 / 配偶戦略 / 雄性ホルモン / 魚類 / アンドロゲン / 繁殖戦略 / 相関進化 / 遺伝基盤 / 適応進化 / 繁殖コスト / 行動生態 / 進化遺伝 / 進化内分泌 / ゲノム編集 / 繁殖行動 / ホルモン合成能 |
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| Outline of Final Research Achievements |
Sex steroid hormone is an important mediator of many social and sexual behaviors in vertebrates and its circulating levels can influence fitness via hormone-mediated phenotypes. The previous studies strongly suggested that male androgen levels are under strong direct selection, and that males with high levels of androgen enjoy a selective advantage in terms of increased reproductive success. To address this prediction, I used natural variation in androgen-mediated traits between different ecotype populations of the Japanese threespined stickleback as a model system. In this study, I elucidated that there is adaptive population divergence of male androgen production in relation to mating system in nature and the presence of androgen-dependent reproductive cost may constrain evolution of high androgen levels and drive evolutionary divergence in androgen levels in relation to breeding system.
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Report
(4 results)
Research Products
(6 results)
