Hablak S. The influence of mutant alleles of AP1, BP1 and TFL1 genes on the inflorescence structure of Arabidopsis thaliana (L.) Heynh.

Object: the genetic system of control of Arabidopsis thaliana inflorescence structures. Aim: to study the genetic mechanism of formation of inflorescence on the Arabidopsis thaliana by effect of recessive mutant genes ap1-1, bp-1 and tfl1-2. Methods: morphological, hybridological, cytogenetical, histochemical staining, statistical. Novelty: the influence of genotype and environment on the cariometrical and cytochemical cells’ genetic, statistic. Results: a pleiotropic effect of AP1, BP1 and TFL1 genes on the inflorescence structure and compactness of Arabidopsis thaliana has been found. It was revealed that under the influence of the recessive ap1-1, bp-1 and tfl1-2 genes A. thaliana instead of a typical tassel formed the inflorescences with a new combination of traits atypical to the Brassicaceae family. It was found that the type of Arabidopsis inflorescence can be controlled by single genes as well as complementary gene interaction where each gene is characterized by its specific effect. An application of the Arabidopsis recessive bp-1 gene in genetic and breeding programs for developing new varieties of intensive types of oil-bearing plants of the Brassicaceae family is proposed. An increase in yield was due to a reduction of the tendency to asynchronous maturation of fruits in the inflorescence, and an improvement of technological effectiveness of the inflorescence structure. Application stage: the theoretical and practical attainments have been included in the respective parts of the general genetics of Lugansk National Agricultural University. Application area: institution of higher education of MES, Minagropolityky of Ukraine