Function of QTL for rice lodging resistance in a typhoon

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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.