ダブルセックスは,真似のスーパー遺伝子です
K Kunte1, W Zhang2, A Tenger-Trolander3
11] National Center for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru 560065, India [2].
Nature
|March 7, 2014
まとめ
単一の遺伝子であるダブルセックスは,スワローテイル蝶の性限定ミミクリを制御し,スーパーゲンのクラスター仮説に異議を唱える. この発見は,一つの遺伝子が,ミミクリのために翼のパターンを切り替える方法を説明しています.
科学分野:
- 進化生物学の進化生物学について
- 遺伝学 遺伝学とは
- エントモロジー エントモロジー学
背景:
- 蝶,特にパピリオの性限定模倣は,有毒なモデルを模倣するメスを含む.
- この模倣は,しばしば"スーパー遺伝子"によって制御される女性の多形翼パターンと関連付けられています.
- 模倣スーパーゲンの機能的性質は,経験的にほとんど特徴づけられていないままです.
研究 の 目的:
- パピリオポリテスのミミクリ・スーパーゲンの遺伝的基礎を特定する.
- 性限定ミミクリ制御の基礎となる機能的メカニズムを調査する.
- 超遺伝子が単一の遺伝子であり,密接に結びついている場所であるという仮説を検証する.
主な方法:
- 遺伝子マッピング,アソシエーションマッピング,シーケンシングを組み合わせた統合的アプローチ.
- トランスクリプトームとゲノムシーケンシングが採用されました.
- 遺伝子発現分析とDNA配列の変異を分析した.
主要な成果:
- 単一の遺伝子であるダブルセックス (dsx) が,Papilio polytes.のミミクリスーパーゲンのコントローラーとして特定されました.
- これは,超遺伝子が密かに結びついている場所のクラスターであるという支配的な見解と対照的です.
- アイソフォームの発現の違いと潜在的にタンパク質配列の進化は,ミミクリ現象型変異に寄与する.
結論:
- ダブルセックスの遺伝子は,ミミクリ・スーパーゲンの役割を果たし,パピリオ・ポリテの翼全体のパターンを制御する.
- これは,単一の遺伝子が複雑なミミクリフェノタイプを媒介することができ,従来のスーパー遺伝子概念に挑戦することを示しています.
- この発見は,異なるスーパーゲン仮説を統合し,複数のリンクされた変異を持つ単一の遺伝子が,ミミクリ進化を駆動できることを示唆しています.
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