INDUCED MORPHOGENETIC VARIATIONS IN PHLOX DRUMMONDII HOOK

摘要

Seeds of Phlox drummondii, a member of family Polemoniaceae, grown as a winter ornamental, were subjected to five doses viz, 5, 10, 15, 20 and 25Kr of gamma irradiations. Effect of various doses on morphology, cytology and pollen fertility of the plant has been investigated. A very high frequency of multivalents and anaphasic bridges were noticed at all the doses. There was a dose dependent increase in the percentage of PMCs showing meiotic abnormalities. 15 and 20Kr doses proved to be most effectivein inducing variations in the genotype.