Genetic effects of 131I in reproductive cells of male mice

Study was made of the frequencies of dominant lethal mutations (DLM) in pre- and post-meiotic germ cells, reciprocal translocations (RT) in spermatogonia and abnormale sperm heads (ASH) induced buy a single intraperitoneal administration of NA 131I with an activity of 1.48-740 kBq/g to male mice. The frequency of DLM was shown to increase only when postmeiotic cells were exposed to the radionuclide. The RT frequency increased insignificantly with increases in the dose of 131 I. The ASH frequency increased only when maximal doses of 131I were administred. The relative biological efficiency (RBE) of 131I with reference to the indices under study is les than 1. (author). 13 refs.; 1 fig.; 2 tabs