【摘要】 用A1,A2不育系与相应的恢复系杂交,再用A1,A2不育系、保持系与A1,A2杂交种交叉杂交,对获得的F1,F2,BC1F1,BC1F2群体进行了育性遗传分析。结果表明,A1,A2雄性不育性均由两对基因控制,但A1,A2基因互不等位。A1雄性不育系的完整遗传模式为S1N2(ms1ms1ms1’ms1’ms2ms2ms2’ms2’),相应的保持系基因型为N1N2(ms1ms1ms1’ms1’ms2ms2ms2’ms2’),A2雄性不育系的遗传模式为N1S2(MS1MS1ms2ms2ms2’ms2’),相应的保持系基因型为N1N2(MS1MS1ms2ms2ms2’ms2’)。A1,A2相应的恢复系核基因型各有6种,其表达方式有明确的对应性,在相应的不育位点,只要有其中一对就可实现对不育系的恢复。分析认为,高粱细胞核、细胞质内均有多种育性基因存在,但是细胞质内的不育基因和细胞核内的不育基因有些是有关系的,有些则是没有关系的,保养有细胞质和细胞核同时具备同样性质的不育基因时,不育特性才能表达,如有一方有可育基因存在,则表现可育,呈对应互作关系。更多还原

【Abstract】 A₁ and A₂ male-sterile lines were crossed with restorer lines,A₁ and A₂ male-sterile and maitainer lines were crossed with the hybrids of A₁ and A₂ cytoplasm. The genetics of sexuality in F₁,F₂,BC₁F₁,BC₁F₂ produced were analysed during 1978～1992. The following conclusions were obtained.The male-sterility of A₁ and A₂ cytoplasm was both controlled by two nuclear genes.The genotype of A₁ cytoplasm male sterility is S₁N₂（ms₁ms₁ms₁^’ms₁^’ms₂ms₂ms₂^’ms₂’） ,and the maintainer line is N₁N₂ （ms₁ms₁ms₁^’ms₁^’ms₂ms₂ms₂^’ms₂^’）. The genotype of A₂ cytoplasm male sterility is N₁S₂ （MS₁MS₁ms₂ms₂ ms₂^’ms₂^’） and the maitainer is N₁N₂（MS₁MS₁ms₂ms₂ms₂^’ms₂^’）. The nuclear genotype of restorer lines of A₁ and A₂ are of 6 types separatly. There are correspondence clealy in the sex expression genes and cytoplasm.更多还原