Dynamics of changes in genetic composition of spring barley gordeins Krasnoyarsk selection

  Abstract. Polymorphism by electrophoresis in starch gel based on use of protein markers of spring barley - gordeins was studied. Comparative analysis of allele diversity and frequency of gordeincoding loci alleles for twenty years of research in two samples in the period of ten years, including 40 varieties of spring barley krasnoyarsk selection. It is shown that during the second period of the study there is a tendency to decrease slightly proportion of heterogeneous sorters. The number of alleles for Hrd A locus decreased by two, for Hrd B locus by four, with one new allele A14 found in Hrd A locus, and the composition of Hrd B locus increased by five new allele variants B3, B22, B81, B95. The number of Hrd F locus alleles remained unchanged and amounted to three allele variants. There has been a change in the frequency of main adaptively significant alleles of the three gordeincoding loci. In the first period of research, the leading position in the frequency of occurrence was taken by formula 2.25.1, and in the second the maximum frequency of occurrence shifted towards formula 12.1.3. There was an increase in the proportion of rare formulas, the number of which increased in the second period of research to twelve variants. Nine first-appeared spring barley formulas were discovered in the second period of research from 2010 to 2020(2.3.2; 2.95.1; 2.22.1; 12.95.1;12.13.2; 28.8.2; 28.25.1; 28.1.1; 14.1.3) and there was increase in the proportion of two rarely seen formulas in the first study period 2.8.2 (4.5 %), 18.67.1 (2.5 %).