2022 Fiscal Year Final Research Report
Super high-diversity of Arthropoda: A perspective from the foundation of evolutionary spermology
| Project/Area Number |
20K04146
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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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| Review Section |
Basic Section 17050:Biogeosciences-related
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
小沢 広和 日本大学, 生物資源科学部, 教授 (20632045)
Smith Robin 滋賀県立琵琶湖博物館, 研究部, 専門学芸員 (70416204)
蛭田 眞平 独立行政法人国立科学博物館, 分子生物多様性研究資料センター, 特定非常勤研究員 (80624642)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 貝形虫 / 節足動物 / 精子形態 / 生殖的隔離 / 種分化 / 生物多様性 |
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| Outline of Final Research Achievements |
This study aims to demonstrate the hypothesis that the difference of sperm morphology causes the reproductive isolation between the closely related species and eventually the species diversification through the comparison of two common extant superfamilies, Cytheroidea and Cypridoidea, Ostracoda. The morphology of soft parts, including sperms, and the DNA were analyzed for closely related 6 species of Xestoleberis setouchiensis group and 3 species of Loxoconcha uranouchiensis group. Both results indicate that the hypothesis is valid because the morphology and the size of sperms are pretty different between species with direct ancestor-descendant relationship.
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| Free Research Field |
進化古生物学
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| Academic Significance and Societal Importance of the Research Achievements |
精子の形態やサイズを極近縁種間で体系的に調べた研究は少なく、本研究は新たなデータを提供することとなった。また、本研究は節足動物の大きな多様性の原因の１つが、精子が形態・サイズをたやすく変えうることから生殖的隔離を引き起こし、種分化をもたらした可能性を強く示唆した。これらは今後「進化精子学」として発展する可能性を示す。
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