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用4个雄性不育系(外引系 CK60A,外引种×本地种的衍生系2219A、36A 和1202A)及其保持系按全部可能的组合互交,产生12个不育单交种。用这些不育单交种再和5个恢复系(285、PD3—1—11、168、IS84、CS3541)杂
12 sterile single cross breeds were generated by crossbreeding with 4 male sterile lines (ext. CK60A, exogenously introduced native strains 2219A, 36A and 1202A) and their maintainer lines in all possible combinations. Using these CMS lines, five restorer lines (285, PD3-1-11, 168, IS84, CS3541)