论文部分内容阅读
在作物辐射诱变育种工作中,M_1的辐射损伤与突变频率有一定的关系(Gaul,1959)。因此,诱变剂量也常以生物学损伤的大小作为计量指标,并在辐射育种工作中取得了一定的实效。如半致死剂量(LD_(50))、临界剂量(以存活率和结实率为指标)、半致矮量(D_(50))等。但在 M_1群体的各体间,可能由于个体敏感性的差异,照射时几何位置的不同等原因,其损伤程度有较大的差异。如(1975)的试验指出,在处理种子时只要在
In crop radiation mutagenesis breeding, M 1 radiation damage and mutation frequency has a certain relationship (Gaul, 1959). Therefore, the dose of mutagenesis is often used as a measure of biological damage size, and has achieved some results in radiation breeding. Such as lethal dose (LD_ (50)), critical dose (survival rate and seed setting rate), semi-short dose (D_ (50)) and so on. However, among the individuals in the M_1 group, the degree of damage may be greatly different due to differences in individual sensitivities and differences in geometric positions at the time of irradiation. As the experiment of (1975) pointed out, it is only necessary to deal with seeds