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O V Antonenko

Publications and source records attributed to O V Antonenko.

7 recordsLinked to original sources
PubMed2003

[Induction of MGE 412 transposition in an isogenic strain of Drosophila melanogaster by different doses of ethanol fumes].

The effect of treatment of males from an isogenic Drosophila melanogaster strain by limiting doses of ethanol fumes on transpositions of MGE 412 was examined. Validity of the phenomenon of transposition induction was demonstrated. We estimated rates of induced transposition (approximately 10(-2) events per site, per sperm, per generation versus < 10(-3) in control) and showed dose dependence of the rate on the exposure time of the males to ethanol fumes. Experiments with alcohol treatment at limiting doses must end either in death of the individuals or bursts of genetic variability in their progeny. In terms of genetics of an individual, this may mean loss of vital hereditary basis followed by mass degradation of the progeny of the "hard drinkers." In terms of populations genetics, this mode of MGE transposition induction can rapidly create a burst of novel genetic variation, which, apart of great losses, may generate a number of advantageous individuals, i.e., be significant for population survival in new, stressful environments.

Animals↗
PubMed2002

[Induction of MGE 412 transposition individually by heat and cold shock in spermatogenesis in Drosophila males].

Effects of temperature treatment (heavy heat shock, HHS; heat shock, HS; and cold shock, CS) on the daily productivity of treated males in different spermatogenesis stages have been studied in isogenic line 51 of Drosophila melanogaster. The average productivity was shown to substantially decrease in all cases. The sum of the HS and CS contributions to this decrease was nearly equal to the HHS (the combined HS and CS) contribution, i.e., these contributions were almost additive. The temperature treatments did not kill mature sperm. In the control, mating productivity of day 1 exceeded that of the next day at least by 10-20%. Each day, most sperm in matings was new, i.e., matured during that day. Transposition induction of MGE 412 was studied at four spermatogenesis stages after HS and CS. Both temperature treatments were effective but CS had a more pronounced inducing effect. Most temperature-induced transpositions occurred at stage 3 (meiosis) and 4 (spermiogenesis). The day rates of transpositions at different stages were estimated. After HS at the meiosis stage, lambda = 0.11 events per initial MGE copy per sperm per day of mating, which is approximately equal to the previous estimates after HHS. After CS at the meiosis stage, lambda = 0.51. The transposition hot sites (including the previously known 43B and 97DE as well as a number of new sites) were detected. The lists of transpositions after CS completely included the corresponding lists after HS, which suggests similarity of induction mechanisms underlying CS and HS.

Animals↗
PubMed2000

[Response of the MGE 412 pattern to truncation selection of a quantitative trait in an isogenic line of drosophila after severe heat shock (SHS)].

Positive and negative selection on the total length of two fragments of an interrupted longitudinal wing vein in an isogenic line of Drosophila melanogaster was accompanied by changes in the genomic localization pattern of MGE 412. Strong truncation selection was conducted in the population of effective size Ne = 160 for 50 generations. Twenty-six out of 35 polymorphic HHS-induced segments of MGE localization behaved as independent copies and markers, whereas 9 segments proved to be selective. The second group included "hot" segments of HHS transposition induction (43B, 97E, etc.). Thus, final consensus patterns of induced MGE transpositions have a random and an adaptive component in generation 50 of positive and negative selection. Selective patterns probably include modifier MGEs, which generate induced genetic regulatory variation of polygenes controlling the selected quantitative trait in the isogenic line after HHS.

Animals↗