【摘要】 通过4个具太谷核不育(Ta)小麦细胞质的回交4代可育材料与其相应核遗传组成的正常细胞质普通小麦轮回亲本品种间的正反 NCⅡ杂交(或由核遗传称为复式双列杂交),探讨 Ta 细胞质对产量等有关性状的遗传效应。试验证实两组亲本核遗传组成相对一致;Ta 细胞质与正常细胞质相比,对粒数、粒重、千粒重、结实率等性状具有不良效应;Ta 细胞质遗传效应主要表现在与核遗传背景的互作,Ta 细胞质与母源核遗传背景互作及该互作与父源核遗传背景的互作对农艺性状的遗传变异有显著效应。本研究提出的正反复式双列杂交设计是分析数量性状细胞质遗传效应的有效方法。更多还原

【Abstract】 A reciprocal NC Ⅱ mating design,the equivalent of double diallelcross mating design on the basis of nuclear genetics,between four malefertile BC₄ strains of wheat with Taigu cytoplasm and four corresponding recurrent parents with normal cytoplasm was used to evaluate thecytoplasmic effects of Taigu nuclear male-sterile wheat.The resultswere as follows:（1）The nuclear genetic backgrounds of the four BC4strains were relatively consistent with their corresponding recurrentparents.（2）The Taigu cytoplasm,in comparison with the normal ones,caused negative effects in traits,such as number and weight of kernelson main spike,1000-kernel weight,percentage of kernel setting,etc.（3）The effects of the Taigu cytoplasm varied with the nuclear genetic background,indicating the importance of the interaction of Taigu cytoplasm× nuclear genetic background in which Taigu cytoplasm × maternalgenomes and Taigu cytoplasm × maternal genomes × paternal genomeswere involved.It was suggested that the reciprocal NC Ⅱ mating designwas an appropriate method in evaluating the cytoplasmic effects of quantitative traits.更多还原