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Spontaneous mitotic recombination and evidence for an x-ray-inducible system for the repair of DNA damage in Drosophila melanogaster

Journal Article · · Genetics; (United States)
OSTI ID:5575028
;
Spontaneous mitotic recombination in the left arm of chromosome 3 was examined in both unirradiated control flies and sibs irradiated early in development by determining the sizes and frequencies of multiple-wing-hair (mwh) clones in the wing blade of heterozygous mwh/+ flies. Approximately 16% of the spontaneous mwh clones arise from events generating cells with an average cell division rate one-third that of the surrounding cells;these are thought to result from events that generate aneuploid cells. Such clones probably arise from a failure correctly to repair spontaneous DNA damage. The frequency of spontaneous events late in development decreases significantly after irradiation as much as 150 hours earlier in development. The suppression of spontaneous events decreases with a longer period of time between irradiation and the final cell divisions in the wing blade. These results suggest the existence of a repair system for DNA damage in Drosophila that is induced by irradiation. The decrease in effect with time following irradiation could result from slow degradation or dilution by subsequent cell growth and division.
Research Organization:
Universidad Autonoma de Madrid, Spain
OSTI ID:
5575028
Journal Information:
Genetics; (United States), Journal Name: Genetics; (United States) Vol. 98:1; ISSN GENTA
Country of Publication:
United States
Language:
English

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Related Subjects

550400* -- Genetics
560121 -- Radiation Effects on Cells-- External Source-- (-1987)
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
ARTHROPODS
BIOLOGICAL EFFECTS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
CELL DIVISION
CHROMOSOMAL ABERRATIONS
CLONING
DATA
DIPTERA
DNA
DROSOPHILA
ELECTROMAGNETIC RADIATION
EXPERIMENTAL DATA
FLIES
FRUIT FLIES
INFORMATION
INHIBITION
INSECTS
INVERTEBRATES
IONIZING RADIATIONS
MITOSIS
MUTATIONS
NUCLEIC ACIDS
NUMERICAL DATA
ORGANIC COMPOUNDS
RADIATIONS
RECOVERY
REPAIR
X RADIATION