2022 Fiscal Year Final Research Report
Unveiling the common evolutionary mechanisms of adaptive characters possessed by aquatic amniotes
| Project/Area Number |
19H03289
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 45030:Biodiversity and systematics-related
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| Research Institution | Toho University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
寺井 洋平 総合研究大学院大学, 先導科学研究科, 助教 (30432016)
岸田 拓士 ふじのくに地球環境史ミュージアム, 学芸課, 准教授 (40527892)
田村 宏治 東北大学, 生命科学研究科, 教授 (70261550)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 羊膜類 / 適応形質 / 形態 / 発生 / 比較 / 進化 / 海 |
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| Outline of Final Research Achievements |
The expression patterns of genes that are responsible for gland formation in vertebrate embryos were compared among the embryonic head tissues of the green sea turtle with salt glands and freshwater turtles without salt glands.The results showed that multiple gland-forming genes were ectopically expressed only in the embryonic head of the green sea turtles. Total RNA was extracted from the forelimb primordia of green sea turtle, Chinese softshell turtle, and Reeve's pond turtle embryos during limb formation, and the transcriptomes were compared between species using a high-throughput DNA sequencer. As a result, some genes whose expression varied only in the forelimb primordium of sea turtle embryos were identified.
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| Free Research Field |
比較生物学
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| Academic Significance and Societal Importance of the Research Achievements |
地球上の生物種の多くが海で暮らしているが、海生適応形質を獲得することによって、一部の羊膜類が再び海へと進出したことで、海洋生物の種多様性は一段と高まることとなった。本研究で得られた成果により、海生羊膜類における適応形質獲得機構の一端が明らかになった。これにより、今日の海洋生物多様性が生み出された仕組みについての理解が一層深まるものと考えられる。
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