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  • Author or Editor: L. W. Drewlow x
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Abstract

The apparent mutation (“mutation”) incidence in rooted cuttings of 5 clones of the garden chrysanthemum treated with 32P was determined. The apical buds were pinched off at 3 different times in relation to treatment with doses of 0, 25, 50, and 100 µc of 32P per plant. The 5 clones varied in response to 32P levels, but 25 µc of 32P per plant was most effective for inducing “mutations” and growth abnormalities. Change in flower color was the most frequently observed “mutation". Apical bud removal did not affect the “mutation” rate. Chromosome counts in root tips showed that the parent plants had either 54 or 56 chromosomes, while “mutants” had from 3 less to the same number of chromosomes as the parent clones.

Open Access