interactions of microRNAs with mRNAs of genes, the function of miRNAs in plants, biogenesis of plant miRNAs, MirTarget program for predicting sites, MirTarseq program for building oligopeptides, creation of databases of TCP, HSF, MYB, GRAS, ERF, C2H2 TF, MYB family genes of T. aestivum, characteristics of the interaction of zma-miRNAs with mRNA of human genes