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翼のないモルフォゲンによって新しい翼の色彩パターンの生成
Thomas Werner1, Shigeyuki Koshikawa, Thomas M Williams
1Howard Hughes Medical Institute and Laboratory of Molecular Biology, University of Wisconsin, 1525 Linden Drive, Madison, Wisconsin 53706, USA.
Nature
|April 9, 2010
まとめ
翼のないモルフォゲンは,ドロソフィラ・グッティフェラ (Drosophila guttifera) の複雑な翼斑を生成する. この複雑なパターンは,新しい無翼表現部位を加えることで,より単純なデザインから進化した,これは動物の色付けに共通するプロセスである.
科学分野:
- 発達生物学 発達生物学とは
- 進化生物学の進化生物学について
- 動物の色付け 動物の色付け
背景:
- 動物の色彩パターンは,行動と生態学にとって極めて重要です.
- 色彩パターンの形成と進化のメカニズムは十分に理解されていません.
- ドロソフィラ・グッティフェラの斑点羽のパターンは,パターン発達の研究のためのモデルを示しています.
研究 の 目的:
- ドロソフィラ・グッティフェラ (Drosophila guttifera) の斑点翼のパターンの基礎となる発達メカニズムを調査する.
- 複雑な斑点パターンを生み出した進化の経路を探求するためです.
- パターン生成における無翼モルフォゲンの役割を決定する.
主な方法:
- 翼の発達中の遺伝子発現パターンの分析.
- 翼のないモルフォゲンの機能を研究するための遺伝子操作.
- 関連種間の翼のパターンの比較分析.
主要な成果:
- ドロソフィラ・グッティフェラの翼の斑点は,翼のない形態遺伝子が誘発する.
- 翼のない表現部位は,事前に存在する位置情報によって決定されます.
- 複雑なスポットパターンは,新しい場所でのWingless表現の協調によって進化した.
- 進化の過程は,既存の発達的枠組みの上に新しいパターンの層を重ねることを含む.
結論:
- 翼のないモルフォゲンは,ドロソフィラ・グッティフェラ (Drosophila guttifera) の斑点翼のパターンを生成する重要な要因です.
- 複雑なパターンの進化は,新しい発達シグナルの漸進的な追加によって起こる可能性があります.
- "層付け"によるパターンの進化のこのメカニズムは,動物界で広く存在しているのかもしれない.
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