对 M_1生理损伤及染色体畸变的各种参数与 M_2突变率及突变谱的关系,已进行过不少研究,但结果并不一致。有人报道,M_1幼苗株高、存活率、颖花育性与 M_2叶绿素突变频率有关。但 Gaul 等人认为,大麦、水稻及番茄 M_2代的叶绿素突变率及突变谱与 M_1的不育性无关。作者为了解基因突变率及突变谱与生理损伤及细胞学损伤的关系,用12种不同剂量水平的γ射线、EMS、NMU 分别处理 IR-8(籼亚种)和“台南8号”(粳亚种)水稻种子。以 M-1幼苗存活率(30天时)、 Many studies have been done on the relationship between the various physiological parameters of M_1 and chromosomal aberrations, the mutation rate of M_2 and the mutation spectrum. However, the results are not consistent. It was reported, M_1 seedling height, survival rate, spike fertility and M_2 chlorophyll mutation frequency. However, Gaul et al. Concluded that the chlorophyll mutation rate and mutation spectrum of M_2 generations in barley, rice and tomato had no relation with M_1 sterility. In order to understand the relationship between gene mutation rate, mutation and physiological injury and cytological damage, IR-8 (indica subspecies) and “Tainan 8” (japonica rice) were treated with 12 different dose levels of γ- Subspecies) rice seeds. M-1 seedling survival rate (30 days)