[Genetic mosaics in the second generation of Oenothera hookeri after treatment with radiowaves].

Morphological mosaic plants were observed in the second generation after a mutagenic treatment of pollen and plants of Oenothera hookeri. The abnormal parts showed differences in colour or form of the leaves. The progeny of the normal parts were normal, the abnormal sectors gave rise to several mutants. This proved the plants to be genetic mosaics. The mutants are described. The mosaics lead to conclusions about the growth in the apex and the leaf primordium. The delay in the occurrence of the mutations is interpreted as a genetic lability after the mutagenic treatment.