Fig. 2. RNA-seq data and DEGs in diploids and tetraploids with or without salt treatment.

a Hierarchical clustering of 24 samples based on the correlation coefficient (r²) between each sample. 2C and 4C are diploid and tetraploid, respectively, without salt treatment; 2S and 4S are diploid and tetraploid, respectively, under salt stress. The color panel represents the r² values. b, c Statistics of up- and downregulated DEGs in leaves (b) and roots (c) for each pairwise comparison. Up- and downregulated DEGs are displayed in dark gray and light gray, respectively. d Correlation of expression changes observed by RNA-seq (Y-axis) and qPCR (X-axis)