The transposition frequency of the hobo mobile element in four successive generations of Drosophila melanogaster strain y 2-717 after an acute γ-irradiation with a dose of 30 Gr amounted to 7.5 × 10−4 per site per genome per generation. Under the same conditions, PCR analysis of the genomic DNA of y 2-717 flies detected new variants of defective hobo sequence. No changes in the hobo localization and PCR products compared with the control were detected in the case of single irradiation with doses of 3 and 30 Gr. The localizations of hobo element on polytene chromosomes of y 2-717 strain did not change during 11 generations after five exposures of flies to 30 Gr. Irradiation of a highly unstable D. melanogaster strain y +743 did not increase the number of families with mutant progeny, yet increased the total number of mutant descendants almost twofold, from 5 to 9%.
Russian Journal of Genetics – Springer Journals
Published: Jun 16, 2006
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