【摘要】 为筛选大翼豆新品种突变株,采用不同剂量的⁶⁰ CO-γ射线辐射大翼豆种子。结果表明,各辐射剂量在一定程度上均抑制大翼豆种子发芽及幼苗的生长,但在0⁸00gy时随着辐射剂量的增加,抑制作用加强,在高剂量1 000、1 200gy时种子发芽及幼苗生长与对照相比无显著差异（P>0.05）;通过育苗盘中观测,辐射剂量与幼苗成活率呈现S型曲线趋势,在200、1 000gy时幼苗成活率分别为曲线的最高点,800gy为最低点。更多还原

【Abstract】 Seeds of siratro were irradiated with 0-1 200 gy of ⁶⁰ CO-γrays to study the effects on the seed germination and seedling development.It was found that the irradiation retarded both.As the dose increased from 0to 800 gy,the inhibition effect increased.Beyond that,the effects on the seeds treated with 1 000 or 1 200 gy did not differ significantly（P>0.05）.The seedling survival rate as observed on a seedling disk appeared to be a parabolic function with a peak at the doses of 200 gy and 1 000 gy,and the lowest at 800 gy.更多还原