Study on the Improvement of Blast Resistance in Rice Dalixiang by Introducing the Broad-spectrum Resistance Gene Pi9
Dalixiang has won the"China Rice Expo Gold Award"for its excellent rice quality and rich aroma for five consecutive times.However,its high susceptibility to rice blast severely limits its large-scale application in production.Using the male parent of Kongyu 131 containing the broad-spectrum resistance gene Pi9,through conventional hybridization,continuous backcrossing,and molecular marker-assisted selection,we introduced Pi9 gene into Dalixiang.An improved strain was created,which had important traits such as leaf morphology,thousand grain weight,rice quality,and aroma that were basically consistent with Dalixiang.The identification results of the resistance of the improved strain of Dalixiang showed that its blast resistance was significantly improved compared to Dalixiang,meeting the resistance standards for variety production and application,achieving directional improvement of blast resistance in Dalixiang.
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