辐射育种是植物有效育种方法之一。我国已用此法培育出许多有经济价值的农作物新品种。遵照毛主席关于“我们必须打破常规,尽量采用先进技术”的教导,我所于1973年开展了此项试验研究,现将部分情况分述如下。一、试验材料及方法试验采用日本落叶松、长白落叶松、美国短叶松和黑松种子。播前,以不同剂量的γ射 Radiation breeding is one of the effective breeding methods for plants. This method has been used by our country to breed many new crop varieties with economic value. In accordance with Chairman Mao’s teaching on “We must break the routine and try to adopt advanced technologies”, we carried out this pilot study in 1973, and we will now make some points as follows. First, the test materials and methods The test uses Japanese larch, Larix gmelinii, American pine and Pinus thunbergii seeds. Before sowing, with different doses of γ-ray