Abstract
The influence of allelic differences between the genes Vrd1 and Ppd-D1 and their interaction with respect to winter hardiness, frost tolerance, and yield and the components of the yield in recombinant-inbred F5 lines of Odesskaya 16/Bezostaya 1 is investigated. From 9 to 15% of the differences with respect to winter hardiness and frost tolerance in the recombinant-inbred lines are attributable to alternative alleles of the Vrd1 gene and 10–16% to the alternative alleles of the Ppd-D1 gene. Interaction between the alleles vrd1 and Ppd-D1a promotes the formation of the greatest winter hardiness and frost tolerance in tillered plants throughout winter. At the same time, a reliable increase in the time to heading and height of the plants as well as a tendency towards reduced yield of grain in lines with the genotype vrd1 vrd1 Ppd-D1a Ppd-D1a by comparison with lines with the genotype Vrd1 Vrd1 Ppd-D1a Ppd-D1a are discovered.
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