Study on Anther Culture Effects of Mutant Lines of ‘Peiai 64S’ Mutagenic Differences of Space Environment and Ground γ-irradiation in Rice MUTAGENIC EFFECTS OF ~(137)Cs GAMMA RAY AND SODIUM AZIDE COMBINED TREATMENT ON RICE(Oryza sativa L. ) Analysis on mutagenic effects of EMS on three maize inbred lines MUTAGENIC EFFECTS ON INDICA RICE CARRIED BY SATELLITE MUTAGENIC EFFECTS OF SYNCHROTRON SOFT X-RAY WITH RESONANCE ENERGY OF Nk IRRADIATION ON Rhizopus oryzae