Fig. 2From: Transcriptome profiling and comparison of maize ear heterosis during the spikelet and floret differentiation stagesVenn diagram comparison and hierarchical cluster analysis of differentially expressed genes among genotypes. Venn diagram comparison of differential expressed genes between the hybrid and its parents in the spikelet (a) and floret differentiation stages (b) of maize immature ear. c Hierarchical cluster analysis of differentially expressed genes among genotypes. The color key represents log10(RPKM + 1). Red indicates high relative expression and blue indicates low relative expression. S denotes the spikelet differentiation stage, F denotes the floret differentiation stageBack to article page