パロメロのゲノムは,家畜化における金属の影響を示唆している
Jean-Philippe Vielle-Calzada1, Octavio Martínez de la Vega, Gustavo Hernández-Guzmán
1Laboratorio Nacional de Genómica para la Biodiversidad, CINVESTAV Irapuato, Km 9.6 Libramiento Norte Carretera Irapuato-León, 36500 Irapuato, Mexico.
Science (New York, N.Y.)
|December 8, 2009
まとめ
Palomero Toluqueñoのようなトウモロコシの土地種は,作物の進化に関する遺伝的洞察を提供します. 配列解析により,重金属の解毒に関連する遺伝子の変動性が低いことが明らかになり,家畜化中の環境適応を示唆しています.
科学分野:
- ゲノミクスゲノミクスとは
- 植物科学 植物科学について
- 進化生物学の進化生物学について
背景:
- トウモロコシ (Zea mays ssp. landracesは,作物の進化を理解するための重要な遺伝資源です.
- 陸生種の遺伝的多様性を探求することは,家畜化と適応に関連する遺伝子を特定するのに役立ちます.
- 国産トウモロコシの品種は,その歴史と環境の相互作用を反映したユニークな遺伝情報を保持しています.
研究 の 目的:
- メキシコのトウモロコシのランドレースであるPalomero Toluqueñoのゲノムを de novo 配列化する.
- パロメロ・トルーケニョのゲノムと,現代の同系B73.3のゲノムを比較する.
- トウモロコシの家畜化と適応に関連するゲノム領域と遺伝子を特定する.
主な方法:
- パロメロ・トルーケニョ陸上種の全ゲノム配列解析.
- パロメロ・トルクエニョとB73.3の比較ゲノム解析
- ニュクレオチドの多様性が低い地域と関連する遺伝子の特定.
主要な成果:
- Palomero Toluqueñoの約2ギガベースのゲノムは,新規に配列化されました.
- Palomero ToluqueñoとB73の違いが特定され,その古代の起源を反映しています.
- 重金属の解毒のための遺伝子を含む,低ヌクレオチド変性を持つ染色体の領域が特定されました.
結論:
- 環境の変化は,トウモロコシの家畜化中に選択的な力として重要な役割を果たしました.
- この研究は,トウモロコシのゲノム進化を理解するために,陸地種の重要性を強調しています.
- 排毒に関与する特定の遺伝子は,家畜化中に強い選択を受けていたのかもしれません.
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