収束進化のフードの下での高度な新しさ
Steven M Van Belleghem1,2, Angelo A Ruggieri1, Carolina Concha1,3
1Department of Biology, University of Puerto Rico, Rio Piedras, Puerto Rico.
Science (New York, N.Y.)
|March 9, 2023
まとめ
蝶の種は 独特の遺伝的変化によって 類似した翼のパターンを達成します この研究は,ミメティックな種におけるユニークな規制要素と遺伝子発現を明らかにし,コンバージェントな現象型にもかかわらず,進化の分岐を強調しています.
科学分野:
- 進化生物学
- 発達遺伝学
- ゲノミクス
背景:
- 異種の種が類似した特徴を進化させる現象は一般的だが,規制レベルでは十分に理解されていない.
- ホモロゴスな規制アーキテクチャは,収束する進化の根底にあると仮定されていますが,経験的証拠は依然として稀です.
研究 の 目的:
- 模倣蝶のペアにおける表型収束の基礎となる規制構造を調査する.
- 遺伝子の発現とクロマチンのアクセシビリティを比較して,共通と異なる規制メカニズムを特定する.
主な方法:
- ATAC-seqを使用してクロマチンのアクセシビリティの特徴付け.
- RNA-seqを用いた遺伝子発現の分析
- 蝶の翼の発達における規制要素の比較ゲノミクス
主要な成果:
- クロマチンのアクセシビリティと遺伝子発現の有意な差異が2つの模倣蝶種間で観察されました.
- 色彩パターンの遺伝子は共有されていますが 翼の発達経路への統合は異なっており 進化の異なる経路を示唆しています
- モジュラーオプティックスエンハンサーは 一種における新しい系統特有の進化を示し,新しい規制の革新を示した.
結論:
- ミメティックな蝶のコンバージェントなフェノタイプは,異なる規制経路と遺伝的変化から生じる.
- 進化の偶然性や進化のドリフトは,ミミクリの独立した進化において重要な役割を果たしています.
- 規則的進化を理解することは,類似した特徴が異なる分子メカニズムを通してどのように進化するか説明するために不可欠です.
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