摘要： 利用不同辐照剂量的⁶⁰Co-γ射线对3个品种的大豆种子进行辐照处理,剂量分别为0(CK),50,100,150,200,250和300 Gy 7个水平,剂量率为1.2 Gy/min。根据大豆M₁的成株率和M₂农艺性状的变异率确定辐照的最佳剂量以及对M₂的致变效应。结果表明:辐照处理对M₁的农艺性状有抑制作用,其性状平均数与辐照剂量呈显著负相关,关系式为y=0.000 1x²-0.381x+102.9(R²=0.962 7^**);品种间最佳剂量有差异,平均为144.3 Gy;不同辐照剂量对M2植株的株高、主茎节数、荚长、单株荚数、单株粒数和百粒重等都有不同程度的影响,剂量越大,影响越大;由于基因的突变,在M₂植株中可发现一些超亲类型。

关键词: 大豆, 辐照, 农艺性状, 致变效应

Abstract: Gene mutation ratio could be improvedby irradiation.To study the rote of irradiation techniques in the rela -tionship between irradiation dosage and generation after irradiation is important?3 cultivars of soybean were irradiated by 6 irradiation dosages of ⁶⁰ Co -rays, 50, 100, 150, 200, 250, 300 Gy and 0 Gy( ck), respectively, and the ratio of irradiation dosage was 1.2Gy/ m in this paper.Based on the living plant ratio inM ₁ and the mutation effect inM ₂, the best irradiation dosage and the irradiation dosage in M₂were evaluated in the test.The results showed that the mean value of the agronomic characters which were control growth was in negative correlation with the irradiation dosage in the M₁ generation by ⁶⁰ Co -rays.The equation follows as y= 0.0001x² - 0?381x+ 102.9( R ² = 0962 7^**) ;The best irradiation dosage was different in cultivars andtheir mean value was 144.3 Gy; and the plant height, mainnode number, pod length, pod and grain number per plant and hundred -grain -weight were affected by different irradiation dosage in M₂, and the more irradiation dosage, the greater effect in a certain extent; gene mutation enabled the plants to exceed their parents in M-generation.

Key words: Soybean, Irradiation, Agronomic characters, Mutate effect

中图分类号: 

• S565.1