2009 Fiscal Year Final Research Report
Function of QTL for rice lodging resistance in a typhoon
| Project/Area Number |
19580020
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Crop science/Weed science
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| Research Institution | National Institute of Agrobiological Sciences |
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Principal Investigator |
ISHIMARU Ken National Institute of Agrobiological Sciences, 光環境応答研究ユニット, 主任研究員 (80370641)
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| Project Period (FY) |
2007 – 2009
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| Keywords | イネ / コシヒカリ / 倒伏 / QTL |
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| Research Abstract |
We demonstrated the new target for lodging resistance in rice (Oryzasativa L.) by the analysis of physiological function of a locus for lodging resistance in a typhoon (Lrt5) with the near isogenic line under rice "Koshihikari" genetic background. The weight of the buckled upper plant parts increased the pressure on adjacent plants and caused a domino effect in "Koshihikari". The rigidity of the upper culm by the higher starch content (as a result of delayed senescence in the upper leaves) may be responsible for the higher lodging resistance during a typhoon in rice. Additionally, linkage mapping allowed us to map the Lrt5 region to 4.6cM.
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