支配的階層は,複雑な小さなRNAの規制ネットワークの進化から生じる
Eléonore Durand1, Raphaël Méheust1, Marion Soucaze1
1Laboratoire Génétique et Evolution des Populations Végétales, CNRS UMR 8198, Université Lille 1, F-59655 Villeneuve d'Ascq cedex, France.
まとめ
Brassicaceae植物における自己不適合性は,Sロカスによって制御される. 小型RNA (sRNA) とその標的は,S-ロカスアレル間の優位性階層を調節するために進化し,自己受精を防止しました.
科学分野:
- 植物遺伝学 植物遺伝学
- 進化生物学の進化生物学について
- 分子生物学は分子生物学である.
背景:
- ブラシカセアの自己不適合性により,Sロカス経由での自己受精が妨げられます.
- Sロクスのアレルは,フェノタイプ表現に影響を与える支配的階層を持っています.
研究 の 目的:
- アラビドプシスのS-ロカス支配階層を制御する進化的メカニズムを調査する.
- 小型RNA (sRNA) がS-ロクスのアレル相互作用を調節する役割を特定する.
主な方法:
- 少なくとも17の小型のRNA (sRNA) 産生ロシウムの分析.
- S-ロカス遺伝子内の複数のsRNA標的部位の識別.
- アレル優位性に関するsRNA-ターゲット相互作用の集団制御を調査する.
主要な成果:
- 数多くのsRNAロシとその標的を含む複雑な規制システムを発見した.
- これらのsRNA-ターゲットの相互作用が集団的にS-ロクスの支配階層を支配することを示した.
- アレル調節を形作るsRNA-ターゲット相互作用の進化的ダイナミクスを示した.
結論:
- 小型RNA経路は,Sロカスで複雑な支配階層を確立し,維持するために進化しました.
- この規制システムは,アラビドプシスの自己受粉を防ぐために極めて重要です.
- 進化的選択は,sRNA遺伝子とその標的間のダイナミックな相互作用を形作っています.
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