Abstract
VERY little information is available on the effects of neutrons on mutagenesis in female germ cells. In mice, published work with fast neutrons at high and low intensities has been confined to the irradiation of spermatozoa for the induction of dominant lethals1, and to spermatogonia for specific locus mutations2,3. In insects, however, relative biological effectiveness (RBE) of 2–4 has been demonstrated in Mormoniella adult females for recessive eye colour mutants following high doses of fission neutrons4, and higher values for low doses. Similarly, acute doses of 14 MeV neutrons have an RBE of 1.2 for recessive visible mutations in silkworm oogonia5, while fission neutrons have RBEs of 2.5–3 (ref. 6). This communication presents data on the mutagenic effects of 14 MeV neutrons as compared to cobalt-60 gamma rays in adult females of Dahlbominus fuscipennis.
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