[Remote effect of irradiation on a heterogenesis of apomictic plants]

Abstract

Dandelion seeds were singly exposed to gamma-rays in a wide range of damaging doses. It was studied how the exposure influenced viability, mutability and radiosensitivity of seed descendants in a sequential turn of generations F1-F5. Non-lethal damages to genome, replicated in a sequence of generations, alongside with other effects, were found. Phenotypically the descendants showed the increasing loss of acrospires, the augmentation of abnormal shapes percentage in the sampling, the extension of span of variability of morphological features, the ambiguity of reactions to additional radiation impact. In the fifth generation the linear dependence of the effects on the doses received by the precursors disappeared.