title: [Changes in the intensity of effect and spectrum of action on quantitative traits of genes in Arabidopsis under varying conditions of cultivation].
abstract: Three experiments were performed in different years to study a pleiotropic effect of two marker genes A and B on quantitative traits in Arabidopsis thaliana L. (Heynh.) Experiments differed in their conditions for plant growth (light intensity and soil fertility). In experiment 1, substitution of B- by bb did not affect the duration of the sowing-flowering period, whereas substitution of A- by aa caused a 2-day delay in flowering. Experiment 2 showed that both genes affected this trait. The delay in flowering was one, two, or three days when B- was substituted by bb, A- by aa, or A-B- by aabb, respectively. Therefore, these genes were additive. Data of experiments 3 were opposite to those of experiment 1: substitution of A- by aa did not affect the trait studied, whereas substitution of B- by bb caused a 2-day elongation of the sowing-flowering period. Thus, variations in growth conditions transformed the effects of the marker genes duration of the sowing-flowering period and changed a set of genes that determined this trait. Note that effects of A and B genes on other qualitative and quantitative traits (for example, plant height) were constant in all experiments. Therefore, transformation of a gene set, which influenced the sowing-flowering period, was not related to the repression or derepression of A and B genes.
authors.forename: I D
authors.initials: ID
authors.lastname: Sokolov
authors.forename: E I
authors.initials: EI
authors.lastname: Sokolova
authors.forename: P V
authors.initials: PV
authors.lastname: Shelikhov
authors.forename: T I
authors.initials: TI
authors.lastname: Sokolova
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000254:growth & development; D017343:Genes, Plant; D005819:Genetic Markers; D005838:Genotype; D008027:Light; D010641:Phenotype; D019655:Quantitative Trait, Heritable; D012987:Soil
chemical_list: D005819:Genetic Markers; D012987:Soil