【摘要】 在中粳杂交组合“M90 5 6× R80 18选”的 F6 选种圃中 ,发现半矮秆突变单株。以纯合半矮秆单株为父、母本 ,与稳定野生型高秆单株进行正、反杂交。种植 P1 、P2 、F1 、F2 世代群体。结果表明 F1 植株与半矮秆亲本基本相同 ,仍然表现半矮秆。说明该半矮秆突变材料的矮生性表达为显性 ,无细胞质效应。 F2 群体植株株高性状发生分离 ,其分离比符合一对等位基因的遗传模式 ,说明该半矮秆材料的矮生性表达受一对核基因控制更多还原

【Abstract】 In F 6 generation selected nursery of medium japonica rice cross between M9056 and R8018 xuan, a semi dwarf mutant was found. Based on the analysis of the populations variation of plant height of F 1 and F 2 from reciprocal cross and its parents, it was found that the semi dwarfism of the mutant was controlled by a pair of dominant nuclear genes, its expression could not be affected by cytoplasm.更多还原