CYTOPLASMIC MALE-STERILITY IN BARLEY .3. MAINTENANCE OF STERILITY AND RESTORATION OF FERTILITY IN THE MSML CYTOPLASM

58 varieties, strains or mutants of barley were tested in the msml cytoplasm in Finland, location ca. 61 N. Three (5%) were found to be partial restorers, the rest being maintainers of sterility. 31 Israeli strains of wild barley (ssp. spontaneum) were tested. About one third were maintainers of sterility, the majority partial restorers, and two strains were full restorers. There is probably polymorphism of the restorer gene in Israeli wild barley. Partial restoration displays an environmental response. The physiology of partial restoration is discussed. © 1979 H. Veenman En Zonen B.V.