[The effect of directed and stabilizing selection on the population size of Drosophila melanogaster].
Population size as a measure of population fitness was assayed in laboratory lines of Drosophila melanogaster subjected to directional selection for positive photoactivity and stabilizing selection for a complex of metric wing characters. Three experimental designs were used: directional and stabilizing selection (DS); directional selection (D); unselected controls (C). Population size increased under all three experimental designs. The population size of DS and C lines as well as the rate of increase of the DS lines were higher as compared to the D lines. The results suggest that stabilizing selection maintains population fitness at the higher level.
Imasheva
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AG
Zhivotovskiĭ
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LA
Lazebnyĭ
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OE
D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D005828:Genetics, Population; D011156:Population Density; D012641:Selection, Genetic
Vliianie napravlennogo i stabiliziruiuhchego otbora na chislennost' populiatsiĭ Drosophila melanogaster.