【摘要】 以3个普通小麦推广品种为材料,种子先经理化诱变处理后(EMS_0.2M,r—射线30KR,SA2mM),接种M₁代幼胚进行离体培养,比较了再生R₂代不同处理的变异频率。结果表明,EMS 处理后R₂代的变异频率和不分离变异所占比例最高;有益变异频率的提高以r—射线处理的R₂代最为显著,SA 处理也具有提高R₂变异频率的作用,但其有益变异及不分离变异与R₂对照接近。诱变处理后R₂代与R₂对照相比,对变异谱没有明显影响。更多还原

【Abstract】 The effect of mutagenic treatments combined with immature embryoculture on the variation frequency of common wheat in R2 generation（M₃R₂）wastested using three wheat varieties.The immature embryo derived from theseeds pre-treated with mutagens（EMS0.2M,r-radiation 30KR,SA 2mM）was inoculated.The results showed that the M₂R₂ treated with EMS hadthe highest variation frequency and proportion of non-segregating variationin R2 generation.The highest useful variation frequency were found inr-radiated material.Although the variation frequency was increased in SAtreatment,the frequency of useful variation and proportion of non-segregatingvariation had no difference with control（R2）.No evidence was found thatvariation spectrum was enlarged in mutagenic treated material than R2.更多还原