[Mutations in Oenothera hookeri after prolonged influence of radiowaves during one vegetationperiod].

Plants of Oe. hookeri were grown under the influence of a radiostation during one vegetationperiod (M 0-generation). After selfing and crossing of pollen of these plants on emasculated, untreated flowers, in the M 1- and M 2-generation an increase of lethal embryos, plants with reduced viability and morphological variability of quantitative characters was observed. In M 2 6 families out of 23 gave rise to a monogenic mutant, 2 families segregated for 2 mutants each. The mutations occurred as somatic mutations in the M 0-plants, as meiotic or gametophytic mutations or as somatic mutations in the M 1-embryos. These results are an additional proof for the mutagenic action of radio-waves.