Abstract
Inheritance of resistance to the Punjab isolate of Xanthomonas campestris pv. oryzae of bacterial blight disease of rice was studied in seven breeding lines resistant to the disease. The results revealed that resistance in breeding lines PAU 122-73-1-4-1, PAU 164-102-1-2-1-1-1, KJT 24, IR 5657-33-2-1-2 and IR 22082-41-2-2 was controlled by single dominant genes allelic to the dominant gene which confers resistance to the Punjab isolate in Patong 32. Resistance to the Punjab isolate in breeding lines IET 7172 and RP 2151-40-1 was found to be controlled by single recessive resistance genes allelic to one of the recessive resistance genes present in BJ 1. The two genes are independently inherited and are being used to develop bacterial blight resistant varieties.
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