对3个水稻品种成熟种子播前给予279Gy~(60)Coγ射线辐照,取其 M_1和对照的幼穗进行组织培养,分析了 M_2及再生植株自交一代群体的性状变异。结果表明:各品种处理后自交一代群体,无论是性状的方差和变异系数,还是突变频率和突变谱,均主要表现为辐照加组培处理>体细胞无性系变异>辐照处理>原亲本。 The mature seeds of three rice cultivars were treated with 279 Gy ~ (60) Co γ-rays before sowing, and their M_1 and control young spikes were cultured. The morphological variations of M_2 and regenerated plants were analyzed. The results showed that: After treatment, the self-cross generation population, whether it is the variance of variance and coefficient of variation, mutation frequency or mutation spectrum, are mainly characterized by irradiation and tissue culture treatment> somatic clonal variation> radiation treatment Parents.