摘要
玉米杂交种 (F1)的花粉用60 Coγ射线照射后 ,采取自交的方法进行授粉 ,观测其结实情况及后代植株的状况 ,以探讨照射花粉对M1结实及后代植株生长的影响。结果表明 ,较大剂量 (10 0Gy)照射花粉后 ,M1的结实性受到极大的影响 ,外观正常的子粒极少 ,瘪粒和泡状物所占比例很高 ;用 10 0Gy和 5 0Gy的γ射线分别处理杂交种两个亲本的花粉 ,然后将花粉混合起来授粉 ,其性状的表现与单一剂量照射花粉植株无明显差异 ;M2 与对照相比 ,差异显著 ,并出现雄穗花药、花粉发育不良的植株 ;M3 植株仍表现出了照射的损伤作用 ,在主要调查性状中 ,它的变异幅度都大于对照 ,并出现有明显突变性状的个体 。
The irradiation effects were studied by the methods of exposing the pollen of maize hybrid (M 1) to 60 Coγ_ray and self_crossing in the M 1 and subsequent generation The results were as follows: the seed setting of M 1 generation was severely affected after pollen was treated with a rather high dose (100 Gy) , the ear bearing more scurfy seeds,alveolar_liked structures and less plump seeds The difference between two treatments: (1) irradiating two inbred lines of one hybrid with two doses (100 Gy and 50 Gy) separately, then pollinating with blended pollen (2) irradiating with single dose, was not significant Anther and (or) pollen_aborted plants appeared in M 2 generation; The damage effects of irradiation still existed in M 3 generation, and several plants having mutant characters appeared, the opportunity of breeding selection increased
出处
《玉米科学》
CAS
CSCD
2002年第4期39-41,共3页
Journal of Maize Sciences
