研究了碳－１４诱发水稻突变方向与诱变品种遗传背景、处理剂量和处理时期的关系。结果表明：碳－１４诱发突变方向与诱变品种遗传背景呈逆相关，即早熟、矮秆的品种产生迟熟、高秆突变；迟熟、高秆的品种产生早熟、矮秆突变；熟期和株高中等的品种产生早熟和迟熟，矮秆和高秆双向突变。此外，突变方向还与处理剂量和时期有关。 The relationship between the C-14-induced rice mutation and the genetic background, the treatment dose and the treatment period was studied. The results showed that the direction of C14-induced mutation was inversely related to the genetic background of the mutants, that is, the precocious and dwarf varieties had late maturity and high stalk mutation; the late maturity and tall stalk varieties had the early maturity and dwarf mutation; And medium-sized varieties of early maturing and late maturity, dwarf and tall stalk two-way mutation. In addition, the direction of mutation is also related to the dose and period of treatment.