Genetic variance in Vicia cracca cenopopulation inhabiting site with enhanced level of natural radioactivity

The contribution of low dose rate ionizing radiation into genetic variance in Vicia cracca L. cenopopulation inhabiting high natural background territories more then 40 years quantity estimation was made. Incorporated in the aboveground parts of Vicia cracca 230Th determine both the level of intrapopulation genetic variance and the adaptive possibility. Significantly increased frequency of double fragments was revealed in root tips of plants inhabiting all experimental plots. This type of damages depends on 226Ra concentrations accumulated in the aboveground parts of Vicia cracca. External irradiation influences the embryonic lethals. It was found that the relative contribution on mutagenesis induced by ionizing radiation was significant and was about 3-5% of the total variance.