title: [Embryonic mortality of the root vole as an index of the effect of small doses of natural radioactivity on genetic processes in populations].
abstract: A study was made of the pre- and post-implantation death of (F2--F4) Microtus oeconomus progeny whose parents lived in territories where natural radiation background was increased (an exposition dose-rate of 3.6-144.0 pC/kg X s). The spontaneous rate of pre- and post-implantation death of progeny of irradiated (experimental) animals was higher than that of intact ones (control). The animals kept in conditions of chronic irradiation (46.2 pC/kg X s) exhibited a more pronounced discrepancy in embryonal death rate. It is suggested that genetic differences in the populations were responsible for different rate of embryonal death of the control and experimental animals.
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000196:embryology* / Q000235:genetics; D001417:Background Radiation / Q000009:adverse effects*; D004307:Dose-Response Relationship, Radiation; D020964:Embryo Loss / Q000209:etiology*; D047108:Embryonic Development / Q000528:radiation effects; D005260:Female; D005313:Fetal Death / Q000209:etiology*; D011247:Pregnancy; D011839:Radiation, Ionizing / Q000009:adverse effects*
vernacular_title: Embrional'naia smertnost' polevki-ékonomki kak pokazatel' vliianiia malykh doz estestvennoĭ radioaktivnosti na geneticheskie protsessy v populiatsiiakh.