| Project/Area Number |
25640119
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Conservation of biological resources
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
KANEKATSU Motoki 東京農工大学, (連合)農学研究科(研究院), 教授 (60177508)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 種子寿命 / イネ / RNA / 染色体断片置換系統群 / long-lived RNA / 遺伝的改良 / トランスクリプトーム / プロテオーム |
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| Outline of Final Research Achievements |
The seed longevity is an important character from the viewpoint of maintenance of the genetic resource and keeping of the seed vigor in the agricultural market. The mature dry seeds contain translatable mRNAs called long-lived mRNAs and protein synthesis during the initial phase of seed germination occurs from these mRNAs, without de novo transcription. This suggests that the stability of long-lived mRNAs may be important to maintain the seed longevity. It was found that i) the long-lived mRNAs required for germination predominantly accumulate in rice embryo between 10 and 20 days after flowering; and ii) the stability of the RNAs is involved in the regulation of longevity in rice seeds. In addition, the analysis about the genes responsible for controlling of seed longevity has been carried out using chromosome segment substitution lines. Moreover, excellent cultivars with long seed life could be found as a result of examination using seeds in the world core collection.
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