2020 Fiscal Year Final Research Report
Identification of key factors regulating tuber enlargement through the linkage between aboveground and belowground parts in water yam (Dioscorea alata L.)
Project/Area Number |
19K15824
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 39020:Crop production science-related
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Research Institution | Kyushu University |
Principal Investigator |
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Project Period (FY) |
2019-04-01 – 2021-03-31
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Keywords | ダイジョ / 塊茎肥大 / 光環境 / 土壌水分 / 転流 / 放射線照射 / 突然変異 |
Outline of Final Research Achievements |
Dioscorea ssp. has a unique mode of reproduction which formed tuber both aboveground and belowground parts. This study was considered to mechanisms of tuber formation and enlargement in water yam (Dioscorea alata L.). Enlargement of belowground tuber was promoted short-day condition of less than 12 h day-length, and a candidate gene which affected tuber enlargement was selected. Bulbil formation was promoted under short-day + water-flooding condition. It was suggested that physiological mechanisms of signaling from belowground parts and photosynthate translocation are related to that formation. In addition, original mutant lines in water yam were developed by using X-ray from synchrotron light for the purpose of identifying the candidate gene.
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Free Research Field |
作物学
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Academic Significance and Societal Importance of the Research Achievements |
栄養繁殖を基本とするヤムイモ種は、他の普通作物と比較して品種育成が遅れ、種によって生産可能な地域が限定されてきた。本研究において見出した塊茎形成・肥大メカニズムを基盤として、その主因子を制御した品種や栽培法を創出することができれば、早晩性の改変による広域適応性の付与やムカゴ着生の人為的制御などの栽培応用につながり、ヤムイモの生産性向上への足掛かりとなることが期待される。
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