离子束辐照对玉米诱变效应的初步研究

Preliminary study on mutagenic effects of heavy ions irradiation on maize inbred lines

利用兰州重离子加速器提供的12C6+和36Ar18+离子束对玉米自交系郑58、鲁9801、金象4C-1、CSR24001、308和478进行辐照诱变育种试验,探讨了重离子辐照对玉米的诱变效应。结果显示,重离子辐照后种子出苗率和成苗率根据材料不同表现不一,浸泡后种子对辐照敏感性增加。辐照后M1代叶型变异较大;M2代植株经济性状发生变异较多,产生了许多有益的突变性状;M3代部分突变性状能够稳定遗传。由此可见,重离子束辐照育种有利于品种改良和种质创新,是玉米遗传改良的一种有效手段。

In order to study mutagenic effects of different heavy ions irradiation on maize inbred lines, corn seeds of Zheng58, Lu9801, Jinxiang4C-1, CSR24001, 308 and 478 were irradiated with 12C6＋ and 36Ar18＋ ions. The experi- mental results showed that the germination rate and planting percent were different after irradiation. The wettish seeds had higher sensibility to heavy ion irradiation. The leaf type of the plant appeared visible changes in MI generation. In M2 generation, great changes had taken place in economic traits, many of which are beneficial mutation. Some beneficial mutation could be stably inherited in M3 generation. From the above, it can be predicted that heavy ions irradiation is art effective means of genetic improvement of maize.