Fig. 2.
RNA-seq-based whole-genome expression spectra of parental (allelic, at the diploid level) and homoeologous (at the polyploid level) expression divergence for a total of 11,608 genes in the in silico hybrid, reciprocal F1 hybrids, and reciprocal tetraploids, revealed by a log2-transformed boxplot (A), and the numbers of genes showing differential expression of parental homoeologs in each pairwise comparison (B).