Fig. 4From: The occurrence of spring forms in tetraploid Timopheevi wheat is associated with variation in the first intron of the VRN-A1 geneThe neighbor-joining phylogram of species based on the alignment of the nucleotide VRN-1 promoter sequences. Letters in bold within genotypes indicate genomes from which the corresponding sequences were isolated. The numbers above and below forks indicate bootstrap values and times of divergence, respectively. Scale of divergence time in MYA is shown below the phylogram. Sequences were selected covering, at least, 0.8 kb of the promoter region. The sequences analysed herein are marked with an asteriskBack to article page