Distributions of VvbZIP genes in grapevine Chromosomes. Fifty-three VvbZIP genes were mapped to the 14 linkage groups. VvbZIP54 was located on 18 random chromosomes and VvbZIP55 was assigned to the Un chromosome. Five chromosomes (chr9, 10, 11, 16 and 17) have no grapevine bZIP gene, The schematic representation of paralogous regions was adapted from Jaillon et al., with the same color . Acording to the former hypothesis , the ancestral hexaploid genome of V. vinifera was derived from an allopolyploidization of two ancestral genomes: Va and Vc, which are denoted on the right of the figure, and Un is unassigned chromosomes. The chr names in red underline the chromosomes that harbored no bZIP genes. The gene names with collinearity were performed with the some color of chromosome paralogous region.