Abstract
Aim. The aim of this work is to study the nucleotide sequences variability of two genes encoding wheat dehydrins. One of them belong to K-2 group, the other refers to K-3 type (respectively, TaDHN18 and TaDHN19.3 according to the classification of Wang et al.). These loci sre interesting due to their's genes participation in protection of plants from the various adverse abioti ecffects. Methods. Polymorphism of two genes encoding dehydrins was investigated using 6 wheat varieties as examples, among which were spring and winter varieties with different cold resistance, using PCR-based cloning, sequencing, and data processing softwares. Results. An analysis of the obtained nucleotide and hypothetical protein sequences alignment showed that the locus under study in the genomes of different wheat varieties, both spring and winter, is characterized by a high identity degree. Conclusions. The high conservatism of two loci encoding K-2 and K-3 dehydrins was demonstrated.
 Keywords: wheat, dehydrins, polymorphism.
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