1972年用~(60)Coγ射线和氩离子激光照射“663红”小麦的干种子,于第七代选出了抗根腐突变系龙辐5009。该品系比亲本和对照品种都明显增产。在1978年和1979年的根腐病诱发鉴定试验中,表现出了较强的抗病性。突变性质的初步分析表明:就早熟而言,龙辐5009不是基因组合的极端类型。芒型与壳色不是单基因突变。控制芒型和壳色的基因属不完全连锁。 In 1972, the dry seeds of “663 red” wheat were irradiated with ~ (60) Co γ-ray and argon ion laser and the root rot resistant mutant Longfu 5009 was selected in the seventh generation. The line significantly increased compared to the parent and control lines. In 1978 and 1979 the root rot induced identification test, showed a strong resistance. A preliminary analysis of the nature of the mutation showed that, in terms of precocity, Longyu 5009 is not the extreme type of genomics. Mount type and shell color is not a single gene mutation. Mans and shell color control genes are not completely linked.