Shayuk L. Molecular genetic analysis of the genus Beta L.

The thesis deals with studies on molecular-genetic polymorphism of Beta L. species, subspecies as well as cultivated forms of beets. The presence of genetically remote sections inside Beta L. genus was confirmed as well as essential genetic di-vergence of the section Procumbentes to which Canarion beet species belong. There detected that genetic distances between B. vulgaris ssp. adanensis and other subspe-cies of B. vulgaris exceeded than interspecific ones, and the same time genetic dis-tances between species . B. intermedia and B. trigyna are less than differences be-tween species. It was found that the distribution, which was obtained on the results of molecular-genetic polymorphism between subspecies of B. vulgaris L. for different geographical origins, does not reflect genetic relationship to compare there origina-tion and it is possibly connected with their morpho-physiological features. A level of intra-lines heterogeneity for male sterile lines as well as multigerm pollinators of sugar beet was evaluated. Analysis of allelic composition for five MS-loci of sugar beet Ukrainian breeding lines to compare with cultivated European forms resulted in finding out considerable divergences for both in quantity of identi-fied alleles and their frequency. A database of alleles compositions for five microsa-tellite loci was created and molecular-genetic formulas which reflect a genetic struc-ture Ukrainian breeding lines of sugar beet was developed.