Deletions observed in the VRN1 promoter alleles among spring diploid species. Nucleotide positions are indicated according to T. aestivum vrn-A1 (GenBank: AY616455) promoter. In boxes there were represented 3 letter repeats flanked the place of the deletions. The AP1_ProDel_R1 primer annealing site is indicated by solid line and 6 bp repeat near this region in A genome - by dashed line. T_m -T. monococcum, T_u - T. urartu, T_b - T. boeoticum, T_ae - T. aestivum, Ae_sp - Ae. speltoides, Ae_sq - Ae. squarrosa. T_ae_TDC A- vrn-A1 (AY616455), T_ae_TDC B- vrn-B1 (AY616456), T_ae_TDC D- vrn-D1 (AY616457) were obtained from GenBank.