2023 Fiscal Year Final Research Report
Genetic variation in ratoon tiller development and yield formation in ratoon rice cultivation
| Project/Area Number |
19K06006
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 39020:Crop production science-related
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| Research Institution | Meiji University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
加藤 洋一郎 東京大学, 大学院農学生命科学研究科(農学部), 教授 (50463881)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | 水稲再生二期作栽培 / 再生茎 / 萌芽 |
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| Outline of Final Research Achievements |
The objective of this study was to elucidate the effects of ratoon tiller sprout development and growth on yield formation in ratoon rice cultivation. The development and growth of ratoon tiller were shown to be affected by physiological factors such as cutting height, non-structural carbohydrate, and location of stem development of first crop. Furthermore, the varietal differences in the development and growth of ratoon tiller were observed. The importance of variety selection for ratoon rice cultivation was demonstrated. Based on our results, we have demonstrated yields of more than 1000 kg/10a in ratoon rice cultivation.
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| Free Research Field |
作物生産科学
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| Academic Significance and Societal Importance of the Research Achievements |
今後のイネによる食糧増産および低コスト・低労力栽培を両立させる水稲再生二期作栽培の確立に向けて，再生茎の制御機構の解明は必要不可欠である．本研究から再生茎の萌芽の発生・生長の制御機構の一端を解明したことは，停滞していた再生二期作目の収量増加に大きく寄与するものである．また，日本国内における稲作を取り巻く状況が変化する中，水稲再生二期作栽培を用いた主食米，業務用米，飼料用米などの生産に向けて新たな活路を見出すことが期待される．
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