MUTAGENIC EFFICIENCY OF RICE SEED TREATED WITH ~(137)Cs GAMMA RAYS AT VARIOUS TEMPERATURES MUTAGENIC EFFECTS OF ~(137)Cs GAMMA RAY AND SODIUM AZIDE COMBINED TREATMENT ON RICE(Oryza sativa L. ) Effects of 60Co-gamma Rays Irradiation on in Vitro Cultured Cut Chrysanthemum and Variations of Main Morphological Characters in the M1 Generation PRELIMINARY STUDY ON IRRADIATION BREEDING OF ORNAMENTAL LOTUS EFFECT OF ~(60)Co γ-RAYS IRRADIATION PRETREATMENT ON CALLUS INDUCTIVITY AND DIFFERENTIATION OF STRAWBERRY ANTHER THE BREEDING OF A RICE XANTHA LEAF MARKER CMS LINE BY GAMMA RAYS MUTATION THE EFFECTS OF DAMAGE AND MUTAGENESIS OF GAMMA RAYS COMBINED WITH CAFFEINE ON BARLEY