Molecular mechanisms of temperature-sensitive male sterility in rice

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H02179
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 39020:Crop production science-related
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: KAWAGISHI-KOBAYASHI Makiko 国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, 上級研究員 (50355707)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: イネ / 雄性不稔 / 花粉形成 / 高温ストレス

Outline of Final Research Achievements

A novel temperature-sensitive male sterility gene TMS2 is commonly present in angiosperms and is presumed to have universal and significant functions. Since the effect of its deficiency is specifically expressed in pollen development under high temperature conditions, we proposed a model in which TMS2 is not directly involved in pollen development but supports functions of other factors essential for pollen development under high temperature conditions. We detected genes that show specific expression changes under high temperatures conditions and identified proteins that interact with TMS2. We will continue to analyze biological functions of these factors in pollen development to identify key factors for male sterility.

Free Research Field

分子遺伝学

Academic Significance and Societal Importance of the Research Achievements

新規温度感受性雄性不稔遺伝子の特性や機能の一端を明らかにしたことは、高温が花粉の発達異常を引き起こすメカニズムの解明につながり、温暖化傾向の進行に伴い被害の深刻化が懸念される高温不稔への対策に貢献することが期待される。また、温度感受性雄性不稔遺伝子の欠損による温度感受性雄性不稔形質の付与は、イネ以外のさまざまな作物にも適用可能と考えられ、農作物のハイブリッド育種技術に与えるインパクトは非常に大きい。