Abstract:Studies were conducted on the mode of inheritance and allelic relationship of the genes for the resistance to X.campestris pv.oryzaestrain Jiang-Ling 691(IR8)cultivated in Jiang-Ling,Hubei,in ricecultivars Lei-yang-duo-mao,GE456,BG90-2)Bhonia Bhoduel andSadunoni.The studies on F_1, F_2, F_3 and reci