本文介绍应用

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Co-γ射线诱发小麦生产矮杆变异。我们用

M

1

株高标准差大于对照1~2倍的照射量为小麦矮杆诱变照射量，获得了120~50 cm的各级变异株，在

M

2

代筛选的矮杆变异株有易于稳定和不易稳定的两种。突变细胞在生育过程中的修复，可能是不易稳定的原因之一。本文最后认为利用γ射线修饰株高是有效的手段之一。

These studies deal with the induced mutation of short straw wheat with

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Co γ-rays. We used to use these doses of induced mutation that standard deviation of M

1

plant height was twice or three times the controls'. Thus we had been selecting different mutants of 50-120 cm in M2 generation. Most mutants occured in unstable form except a little mutants which were stable. The unstable form of mutants probably was ascri bable to reverse mutation of cells in the process of growth and development. The results in the experiment of induced mutation show that using

60

Co γ-rays. is effective means for the purpose of inducing useful mutants of short straw