| Project/Area Number |
24580030
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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 |
Crop science/Weed science
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| Research Institution | National Agriculture and Food Research Organization |
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Principal Investigator |
TERAO Tomio 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, 上席研究員 (80355578)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 高温登熟 / ＱＴＬ / 白未熟粒 / イネ(Oryza sativa L.) / 耐性 / QTL / イネ / 玄米外観品質 / 遺伝子 / 地球温暖化 |
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| Outline of Final Research Achievements |
Quantitative trait loci (QTLs) for the apparent quality of brown rice under high temperatures during ripening were analyzed using chromosomal segment substitution lines. The chromosomal segments of indica-type cultivar, Habataki, were substituted into a japonica-type cultivar Sasanishiki background. Two putative QTLs, qRG3-2, for the percentage of regular grains, and qTW3-2, for the percentage of TWI grains were identified on chromosome 3. The Habataki-allele at qTW3-2, which was located near a marker, RM14702, mainly reduced the TWI grains, while qRG3-2, which was located near RM3766, increased the regular grains. The effects of these QTLs were more obvious under high-temperature ripening conditions; hence, they are considered to be high-temperature-tolerant QTLs. Incorporation of the Habataki region, including qRG3-2 and qTW3-2 into Japonica-type cultivars is recommended to improve high-temperature tolerance and to increase grain quality.
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