The complementary interaction of Rf-genes in the cytoplasm of CMS maize of the moldavian type

Genetic control of moldavian type CMS was studied in inter-lines crosses Г380-3-1MЧA392 and Г380-3-1MЧW8, where pollen restoration is observed in spite of the absense of the dominant gene Rf₃. It is determined that in these exceptional cases sterilizing action of the cytoplasm is overcome by two dominant genes-restorers marked as Rf^A and Rf^B. The Rf^A-gene acts in the diploid cells of sporophyte, Rf^B-gene reveals its effect in the haploid  genotype of microspores. Both genes are incompatible in male and female gametes as they are allelic. Evidently the gene Rf^B can intensify the action of the main gene Rf₃ and performs the role of its modifier.

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