[Change in gene action, genotype ranks, and results of selection in a Johannesen populations under the effect of environmental factors].

Eight mapped mutants (er, tfl, fb, fca, fd, fe, fg, and fy) of arabidopsis (Arabidopsis thaliana (L.) Heynh.) were chosen as the model for investigation of plant response to vernalization and day length. Six quantitative characters were recorded: the number of days from sowing until flowering, plant weight, stem height, number of rosette leaves, number of cauline leaves, and total leaf number. The genotypes responded differently to environmental changes, which altered the effects of genes on quantitative traits, genotype ranks, and selection consequences. A certain set of environmental factors may result in selection in favor of one genotype, and another set may result in selection for another genotype, with direction and intensity of selection being the same.