^60Coγ射线、激光及两者复合处理小麦的生物学效应

BIOLOGICAL EFFECTS OF ^(60)Co γ-RAYS,LASER AND THEIR COMBINATION TREATMENT ON WHEAT

研究了60Coγ射线、激光及两者复合处理小麦皖科0101的生物学效应。结果表明:60Coγ射线及其与激光复合处理的小麦M1代发芽率、发芽势、发芽指数均与对照无显著差异;但苗高、根长、活力指数、出苗率、成株率均比对照低;出苗期、分蘖期、拔节期、抽穗期、成熟期比对照分别推迟4、11、11、6和9d;越冬蘖、最高蘖、穗数、株高、穗长、小穗数、穗粒数和产量比对照显著降低,而千粒重和成穗率比对照显著增加。60Coγ射线单一处理和与激光复合处理的M2代,均有少数植株发生株高、穗型、熟期、粒重、抗赤霉病变异。激光单因素处理的M1和M2代生育期及农艺性状与对照无显著差异。

Biological effects of ^60 Co γ-irradiation, laser and their combination treatment induction on wheat were studied. The results showed that there was no significant difference of germination rate, potential and exponential between treated samples and control, but the seedling height, root length, viable exponential, survival seedling rate, plant rate were lower than control in M1 generation.The date of germination, tillering, node growth, spike growth and maturing were postponed for 4d, lid, lid, 6d and 9d, compared with control, respectively. The No. of tillers in winter, Max. No. of plant tillers, No. of plant spikes, plant height, spike height, No. of divided spikes, No. of spike grains, weight of plant were much lower than control, but 1000-grain weight and rate of survival spikes were much higher than control, in M1 generation. In M2 generation, laser treatment, there were a few mutants in plant height, spike type, maturity, grain weight and scab-resistance when by ^60 Co γ- irradiation, and combination with laser, respectively. There was no significant difference in M1 and M2 generation laser treatment compared with control.