| Project/Area Number |
23580012
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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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| Research Field |
Breeding science
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| Research Institution | National Agriculture and Food Research Organization |
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Principal Investigator |
YOSHIDA Hitoshi 独立行政法人農業・食品産業技術総合研究機構, 作物研究所稲研究領域, 主任研究員 (30355565)
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| Co-Investigator(Kenkyū-buntansha) |
OHMORI Shinnosuke 独立行政法人農業食品産業技術総合研究機構, 中央農業総合研究センター・作物開発研究領域, 研究員 (50391438)
YATOU Osamu 独立行政法人農業食品産業技術総合研究機構, 中央農業総合研究センター・作物開 発研究領域, 研究領域長 (50355575)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 閉花受粉性 / イネ / 開花 / 花器官 / 鱗被 / 変異体 / 内穎 / 外穎 |
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| Research Abstract |
Flower opening of rice is achieved by a series of well-organized events, that is, unlocking of lemma and palea, swelling of lodicule, elongation of stamen filaments, anther dehiscence and stigma opening. In this study, we analyzed genetic mechanism that regulates the flower opening of rice using cleistogamous mutants.
From EMS-mutagenized populations, we identified 8 cleistogamous mutants. One of these mutants was a novel allele of the SPW1 gene that specifies lodicule identity. Another mutation, H193mt, is not related to lodicule development, and the causal gene was mapped to a 250kb region on chromosome 1. We also revealed that short-grain mutants with extremely round-shaped grains and small lodicules were cleistogamous. Furthermore, we identified MADS32 as a novel gene involved in development of flower-opening machinery of rice.
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