Genetics of resistance to bacterial blight and rice blast for two rice germplasm parents

In the experiment,two rice disease-resistant parents 25-289,IR71676-34-1-1,and two susceptible parents Gui 649 and Ze 253 were crossed and combined,bacterial liquid of bacterial blight and rice blast were inoculated to parents and their F1,F2 to discuss the genetic expression in progeny of resistance gene to bacterial blight and rice blast for two rice germplasm.The result showed that the rice bacterial blight resistance gene to the preponderant physiological race in Guangxi of 25-289 was controlled by one dominant major gene,while that of IR71676-34-1-1was controlled by one recessive gene.The rice blast resistance genes of two germplasm parents were encoded by one dominant major gene.Moreover,the bacterial blight and rice blast gene of two rice resistant parents were independent in inheritance.The results could provide theoretical basis on studying and breeding new multi-resistance rice variety.