本试验以平阳霉素为诱变剂处理大豆种子,研究其诱变效应及适宜浓度。结果表明,平阳霉素是一种有效的诱变剂,诱变效应与EMS相近,而且毒性小,作用的有效期长。平阳霉素能引起以染色体断片为主的较高频率的染色体畸变,对M_1植株的生育及形态均有强烈的抑制作用,M_2能够产生各种质量和数量性状变异,特别是产生高蛋白质含量的变异,这在大豆杂交育种中是不易达到的。不同大豆品种对诱变剂的反应有差异。在相同的处理时间和处理条件下,处理大豆品种“合丰25号”适宜剂量为30μg/ml,“吉林20号”和“长农4号”适宜剂量为10～20μg/ml。 In this experiment, Pingyangmycin was used as a mutagen to treat soybean seeds, and its mutagenic effects and appropriate concentration were studied. The results showed that pingyangmycin is an effective mutagen, and the mutagenic effect is similar to that of EMS, and the toxicity is little and the effective period is long. Pingyangmycin can cause higher chromosome aberrations, which are mainly chromosome fragments, strongly inhibit the growth and morphology of M_1 plants. M_2 can produce a variety of quality and quantity variation, especially high protein content Variation, which is not easy to achieve in soybean cross breeding. Different soybean varieties have different responses to mutagens. Under the same treatment time and treatment conditions, the optimum dose of Hefeng 25 was 30μg / ml, and the suitable dosage of Jilin 20 and Changnong 4 was 10 ~ 20μg / ml.