Summary
Twenty-eight X-linked, recessive mutations of Drosophila melanogaster conferring enhanced sensitivity to the monofunctional alkylating agent, methyl methanesulfonate, have been recovered and assigned to five complementation groups. These groups can be distinguished on the basis of map location and variations in the pattern of mutagen sensitivity. Allelism of members of one complementation group with the previously described meiotic mutant, mei-41, (Baker and Carpenter, 1972) as well as the frequent appearance of female infertility with mutagen sensitivity suggests associated defects in meiotic chromosome behavior or early embryogenesis. Examination of the mutagen sensitivity of double mutants has led to the formulation of a working model of DNA repair for this organism. Studies of a similar nature (Boyd et al., 1976) have identified five additional X chromosome complementation groups, suggesting that the genome of Drosophila melanogaster may contain many loci involved with mutagen sensitivity. The continued isolation and characterization of conditional mutants of this type promises future insights into the mechanisms of DNA replication, DNA repair and recombination in this complex higher eucaryote.
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Communicated by M.M. Green
Supported by United States Public Health Service grants GM-20361 and ES-01101 and the Emory University Research Committee
Recipient of United States Public Health Service Research Career Development Award GM-70758
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Smith, P.D. Mutagen sensitivity of Drosophila melanogaster . Molec. Gen. Genet. 149, 73–85 (1976). https://doi.org/10.1007/BF00275962
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DOI: https://doi.org/10.1007/BF00275962