米 の 転写 因子 の 自然 の アレル が,広範囲 の 爆発 耐性 を 与える
Weitao Li1, Ziwei Zhu1, Mawsheng Chern2
1State Key Laboratory of Hybrid Rice, Key Laboratory of Major Crop Diseases and Collaborative Innovation Center for Hybrid Rice in Yangtze River Basin, Rice Research Institute, Sichuan Agricultural University at Wenjiang, Chengdu, Sichuan 611130, China.
Cell
|July 1, 2017
まとめ
科学者は 耐久性のある米の遺伝子変異を発見しました 耐久性のある米の遺伝子変異は 耐久性のある米の遺伝子変異を発見しました 米の品種の10%に存在するこの発見は,作物の回復力を向上させ,収穫損失を減らすための戦略を提供します.
科学分野:
- 植物病理学
- 遺伝学
- 農業科学
背景:
- マグナポルテ・オライゼによって引き起こされる米の爆発は,世界の食糧安全保障に重大な脅威をもたらし,作物の大きな損失を引き起こしています.
- 進化する病原体に対するより広いスペクトルと耐久性のために,人種特有の耐性よりも,非人種特有の耐性が好ましい.
研究 の 目的:
- 種の特異性のないライスブラストに対する耐性を引き起こす遺伝的要因を特定する.
- 米に耐久性疾患を育てるために新たに発見された天然アレルの可能性を調査する.
主な方法:
- 耐性遺伝子を特定するための全ゲノム関連研究 (GWAS).
- アレル頻度を決定するために 3,000個の塩基配列を分析した.
- 遺伝子発現と制御メカニズムの分子分析
主要な成果:
- C2H2型転写因子の自然アレルが特定され,ライスブラストに対する非人種特異的な耐性を授与した.
- この好ましいアレルは調査された米のゲノムの約10%に存在し,繁殖中の選択を示しています.
- このアレルは,MYB転写因子の結合に影響を与え,H2O2の分解を抑制し,耐性を高めることで,bsr- d1の遺伝子発現を減少させます.
結論:
- 新しいアレルは,ブラスト病に対する米の耐久性の育成のための戦略を提供します.
- このアレルの規制メカニズムの理解は,将来の作物改良の取り組みを導くことができます.
- このアレルの流行は,農業の実践におけるその実用性と選択を示唆する.
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