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V K Savchenko

Publications and source records attributed to V K Savchenko.

12 recordsLinked to original sources
PubMed1992

[Change in the genetic structure of an experimental population of Drosophila by electrophoretic locus under the effect of ecological conditions].

Dynamics of the genetic structure of experimental Drosophila populations being kept over 50 generations at 25 and 17 degrees C6 and on the medium with ethanol (12%) was studied. In all experimental populations alteration in allele frequencies of Adh, Gpdh, Hex and Est-6 loci took place in the first 20-25 generations on monitoring under the influence of the temperature and ethanol. Later on, an equilibrium relation between allele frequencies will be established.

Alcohol Dehydrogenase↗
PubMed1990

[Dynamics of quantitative traits of Drosophila during long-term selection].

The results of long-term mass selection for the number of abdominal bristles and thorax length in Drosophila population during over 60 generations in opposite directions are given. It is shown that effectiveness of selection depends upon additive genetic component of phenotypic variability of characters in the initial population.

Animals↗
PubMed1990

[Selected plateau during long-term selection in experimental populations of Drosophila].

Drosophila subpopulations which did not any more response to the artificial selection effect were obtained as the result of long-term selection for the number of abdominal bristles and thorax length. Study on selection lines has shown that genetic variability may both decrease in the process of selection and increase temporarily. Not always does fixation of alleles controlling a quantitative character occur when the selection limits are achieved.

Alleles↗
PubMed1975

[Comparative study of the effectiveness of selection in diploid and autotetraploid populations].

The mitotic activity and ploidy of cells of three strains of cellus tissue by the addition of the culture medium of 0,01; 0,1 and 1 mg/l of phytohemagglutinin was studied. These strains derived from the leaves of haploid, diploid, and tetraploid plants of Lycopersicon, esculentum. The number of dividing cells under the influence of phytohemagglutinin increased by 1;5 and 4% for haploid, diploid and tetraploid strains respectively. The shift of the peak of the mitotic activity at early stages of subculture under the effect of phytohemagglutinin was noticed. Phytohemagglutinin did not change the frequencies of cells of different ploidy in all the strains analysed. A weak mutagenic activity of phytohemagglutinin in the concentrations used was observed. Cells with single bridges were more frequently observed among the aberrant cells.

Diploidy↗
PubMedDate not supplied

[Dynamics of the genetic structure in experimental Drosophila populations for the Adh locus as affected by ethanol].

Electrophoresis method was used to analyze the genetic structure of four experimental Drosophila populations (the control one and those with 5, 10 and 15% of ethanol in the nutrient medium) with initial frequency of AdhF = 0.5 for 50 monitoring generations. It was established that F and S alleles had different selective values. Natural selection favoured the F-allele. Addition of ethanol to the nutrient medium increased the selection intensity in the first 15 generations but did not change the relative adaptability of three genotypes. This caused a similarity of genetic structure in experimental populations during 50 generations.

Alcohol Oxidoreductases↗
PubMedDate not supplied

[Goniometer].

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Equipment Design↗