Fig. 5

Collinearity analysis (a) Collinearity analysis of sunflower HD-ZIP genes. Gray lines suggest all synteny blocks in the sunflower genome, and the red lines indicate segmental duplicated HD-ZIP gene pairs. (b) Collinearity analysis of HD-ZIP genes between sunflower and Arabidopsis. Gray lines in the background indicate the collinear blocks within the sunflower and Arabidopsis genomes, while the red lines highlight collinear pairs of HD-ZIPs.