Understanding the mechanisms controlling panicle morphogenesis in response to environmental changes using Wild Oryza species

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K14832
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 39010:Science in plant genetics and breeding-related
• Research Institution: Nagoya University (2022-2023); National Institute of Genetics (2021)
• Principal Investigator: Agata Ayumi 名古屋大学, 生命農学研究科, 助教 (60875087)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 野生イネ / 環境応答

Outline of Final Research Achievements

This study aimed to elucidate the adaptive mechanisms by which panicle architecture responds to environmental changes and changes its morphology to survive in a constantly fluctuating environment using the diversity of environmental adaptability in wild Oryza species. We evaluated the response of wild Oryza genetic resources across nine genomes and 18 species to drought and salinity stresses and revealed the diversity of their responses. This evaluation identified accessions with robust or sensitive responses to environmental stresses. Genetic analysis was also conducted using chromosome segment substitution lines between cultivated rice and wild relatives.

Free Research Field

植物遺伝育種学

Academic Significance and Societal Importance of the Research Achievements

本研究により、野生イネ遺伝資源が示す環境応答性の多様性の基盤情報を収集することができた。この基盤情報をもとに未利用植物資源である野生イネ遺伝資源の作物育種への利用を検討することで、環境適応型植物デザインが可能になれば、気候変動時代においても安定した食料生産を確保可能な社会が実現できる。