Abstract
To explore synergistic effects of space radiation with other factors, we determined mutagenesis effect of 21 rice varieties with space flight (SP), simulated radiation (C 13.3 kev/µm Ne 31.0-80 kev/µm Fe450- 500 kev/µm in 2.0mGy) on ground comparing with their controls(CK). The results indicated that the cell damage effect is SP>Fe>Ne>C>CK. The japonica rice varieties were higher sensitivity to space environment than indica rice varieties. With active effect of physiology and cell level was in evidence in post-flight, the present study indicated that space radiation may be not only mutagenesis factors to rice seeds, but also other factors during space flight. The effect of mutagenesis on rice seeds of space environment is relative to genetic background of rice varieties.
