INTERACTION OF X AND ULTRAVIOLET RADIATION IN PRODUCTION OF RECESSIVE LETHALS IN DROSOPHILA MELANOGASTER (in Italian)
The possibility that uv rays given to different biological systems before or after x rays could modify genetic or cytological effects is reviewed and discussed. Kaufmann and Hollaender's conclusions about the recovering effect of uv rays on chromosomal damage induced in Drosophila sperms by a pre-treatment of x rays are discussed and analyzed taking into accourt some general considerations. Preliminary results of similar experiments on the frequency of sex-linked recessive lethals induced after single and combined x + uv treatments in Drosophila sperms are reported. All our experiments indicate no effect of the uv treatment (at the given wave lengths and doses) in lowering the frequency of the x-ray-induced recessive lethals. On the contrary, there are some indications for a synergistic action between the two radiations. These results not in agreement with the generally accepted theory that uv rays do recover X-ray- induced chromosomal damages, could be expiained With the well established correlation between chromosomal rejoined breaks and genic mutations. (auth)
- Research Organization:
- Universita, Rome
- NSA Number:
- NSA-17-010393
- OSTI ID:
- 4722138
- Journal Information:
- Atti Associazone Genetica Italiana (Italy), Vol. Vol: 7; Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- Country unknown/Code not available
- Language:
- Italian
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