Plant Breeding Institute, Cambridge, England.
Theor Appl Genet. 1973 Jan;43(1):31-4. doi: 10.1007/BF00277830.
Several instances of the occurrence of male-sterile individuals in progenies of O-type sugar beet lines are described, and the theoretical explanations considered. An attempt was made to transmit cytoplasmic male sterility through massive pollination by plants carrying S-plasm and fertility-restoring genes. No male sterility was demonstrated in the F1 generation, nor in the backcross to the O-type line used as the original recipient. It was concluded that pollen-transmission did not provide an acceptable explanation of the observed degree of contamination of the 0-types, and that N-plasm may have changed into S-plasm in these cases. Segregation of the monogerm character in the same material could not be satisfactorily explained in terms of simple genetic control.
描述了 O 型糖甜菜品系后代中出现雄性不育个体的几种情况，并对理论解释进行了考虑。尝试通过携带 S 质粒和育性恢复基因的植物进行大量授粉来传递细胞质雄性不育。在 F1 代和回交到用作原始受体的 O 型系中均未表现出雄性不育。结论是，花粉传递并不能为观察到的 O 型污染程度提供可接受的解释，并且在这些情况下，N 质粒可能已转变为 S 质粒。无法根据简单的遗传控制来满意地解释同一材料中单胚特性的分离。
