Role of Classical Mutagenesis for Development of New Ornamental Varieties

Abstract

Mutation techniques by using ionizing radiations and other mutagens have successfully produced and commercialized a large number of new promising varieties in diferent crops including ornamental plants worldwide. Considering the importance of induced mutagenesis, extensive work on classical mutagenesis has been carried out by the author, who has successfully developed 76 new mutant varieties using gamma radiation in diferent ornamentals. Research carried out generated voluminous literature on radio-sensitivity, selection of materials, methods of exposure to gamma-rays, suitable dose, detection of mutations, isolation of mutants and commercial exploitation of mutants. Diferent treatment methodologies such as recurrent irradiation, colchicine treatment, and mutation frequency and spectrum, have been precisely determined for successful development of new varieties. Changed lower type, development of appendage like structure on lorets, striped lowers and induction of tubular lorets are a few of the interesting observations in chrysanthemum. Development of late blooming varieties in chrysanthemum has tremendous commercial impact. Studies have clearly proved that classical mutagenesis can be exploited for the creation of new and novel ornamental varieties of commercial importance.