アダプティブ・イントログレッションは,極端な環境汚染から進化的救済を可能にします
Elias M Oziolor1,2,3, Noah M Reid4, Sivan Yair2
1Department of Environmental Science, Center for Reservoir and Aquatic Systems Research (CRASR), and Institute for Biomedical Studies, Baylor University, Waco, TX 76798, USA.
Science (New York, N.Y.)
|May 4, 2019
まとめ
アリル炭化水素受容体 (AHR) 経路を含む重要な適応により 毒素耐性を急速に進化させた. 種間の遺伝子フローは 人間の助けにより 生存に不可欠な適応的多様性をもたらしました
科学分野:
- 環境科学
- 進化生物学
- 遺伝学
背景:
- 環境の変化は 進化の救済に必要な 遺伝的多様性を制限します
- 汚染された海域のキリフィッシュは 毒素に素早く適応します
- アリル炭化水素受容体 (AHR) のシグナル伝達は,毒性反応において極めて重要です.
研究 の 目的:
- 毒素耐性の遺伝的根拠を調査する
- 汚染レベル,AHRシグナル,および抵抗の間の関係を決定する.
- 急速な適応を可能にする 遺伝的多様性の源を特定する.
主な方法:
- 汚染の度合いを越えた 量化された毒性耐性
- AHRシグナル誘導性を評価した.
- 最近の選択で解析されたゲノム位置.
- 関連種からの侵入を調査した.
主要な成果:
- AHRシグナリング誘導性と逆相関する.
- 強い選択シグネチャーを持つロキは AHRシグナリングを制御する遺伝子を含んでいた.
- アトランティック・キリフィッシュから2つのキーロシが 最近侵入した
- AHR遺伝子の欠失により,著しい適応優位性が認められた (s=0. 8).
結論:
- 最近の適応的侵入は 人間によるもので 湾岸キリフィッシュに 重要な遺伝的変化をもたらしました
- 種間の遺伝子フローは,環境の急速な変化の間,適応的変化の重要な源となる可能性があります.
- AHR経路は汚染への適応の主要なターゲットです.
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