Fig. 7From: Comparative analysis of cytokinin response factors in Brassica diploids and amphidiploids and insights into the evolution of Brassica speciesHierarchical clustering and heatmap representation for the expression patterns of CRFs in Brassica species under salt stress. The genes’ relative expression levels at 0, 4, 8, and 16 h after salt treatment. The CRFs of different species are marked by different colors: B. oleracea (red), B. nigra (blue), and B. napus (black). The relative expression levels of genes are presented using fold-change values transformed to Log2 formatBack to article page