ドロソフィラ・メラノガスターの集団におけるデ・ノボ・ゲンの起源と拡散
Li Zhao1, Perot Saelao, Corbin D Jones
1Department of Evolution and Ecology, University of California, Davis, CA 95616, USA.
Science (New York, N.Y.)
|January 25, 2014
まとめ
新しい遺伝子,de novo遺伝子と呼ばれるものは,非遺伝子DNAから発生する可能性があります. 研究者は,これらの新しい丸発現遺伝子を果物ハエで発見し,自然選択が彼らの拡散を駆動し,遺伝子の内容のダイナミズムを明らかにすることを示しました.
科学分野:
- * 進化的ゲノミクス
- * 分子進化による分子進化
- * 集団遺伝学
背景:
- * 比較ゲノミクスは,遺伝子が以前に非遺伝的配列から発生することを示しています.
- *これらのde novo遺伝子の起源と集団レベルでの拡散は十分に理解されていません.
- * ゲノム進化を理解するには,新しい遺伝子の誕生を理解することが重要です.
研究 の 目的:
- * ドロソフィラ・メラノガスターのデノボ・ゲンの起源と進化の動態を調査する.
- * 新しい遺伝子を発生させる配列の源を決定する.
- * 集団内の新種の遺伝子の固定と拡散における自然選択の役割を評価する.
主な方法:
- * ドロソフィラ・メラノガスター群の比較ゲノム解析.
- * 隔離性および固定性丸で発現する新しい遺伝子の特定と特徴付け.
- * 祖先のインタージェニックおよび未表現のオープン・リーディング・フレームからの遺伝子起源の分析.
主要な成果:
- *研究された果物ハエの集団で,142の分離遺伝子と106の固定精巣で発現するデノボ遺伝子を特定しました.
- *デノボ遺伝子は,主に祖先のインタージェニック,未表現のオープン・リーディングフレームから発生した.
- * 証拠によると,自然選択がこれらの新種の遺伝子の拡散と固定に大きく影響したことを示唆している.
結論:
- *この研究は,ドロソフィラの遺伝子内容の進化のダイナミックなプロセスを明らかにしています.
- * 祖先の非遺伝子配列は,新しい遺伝子の出現の重要な源として機能します.
- *自然選択は,集団内で新たに発生した遺伝子の運命を積極的に形作る.
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