Abstract
A reduction in the time to heading, a decrease in plant height, and a reduction in frost resistance, especially in the second half of winter and in spring, is demonstrated in near-isogenic lines and cultivars that are monogenic dominant for gene Vrd1 or gene Vrd2. A greater effect with respect to these traits is typical of the Vrd1 gene and a lesser effect for the Vrd2 gene. The two genes Vrd1 and Vrd2 have practically no influence on the quantitative characteristics of the structural elements of wheat, except for the 1000 kernel weight. It is recommended that genotypes that are monogenic dominant in the Vrd2 gene be used to develop new dwarf cultivars for the southern steppe of Ukraine.
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