Fig. 2: Global transcriptome analysis.

a Heat map showing the expression levels of 20,000 randomly selected genes from Rsi, Rse, Csi, Cse, RCsiu, RCsim, RCsil, RCseu, and RCsel. b Numbers of expressed genes and DEGs of the nine tissues. Total numbers of expressed genes of different tissues are indicated by the black numbers, and the blue and red numbers along the solid black lines reveal the down- and upregulated genes in the five tissues of RrRrCrCr relative to those in the progenitors, respectively. In addition, the red and green numbers in the brackets indicate the genes coming from the RrRr and CrCr subgenomes, respectively. c Total DEGs identified in pairwise comparison among the three sections of pods and between the seeds in the two sections of siliques of the hybrid. d Functional categorization of DEGs in GO terms among the nine tissues. e Expression levels of 20 randomly selected photosynthesis-related DEGs in RrRrCrCr relative to the diploid progenitors. RrRr and CrCr indicated the two subgenomes of the hybrid