Figure 4.

Expression level of Nicotiana gene pairs. Scatter plot showing the expression level (RPKM) for the N. sylvesteris / S genome gene (x-axis) versus N. tomentosiformis / T genome gene (y-axis) for homologous gene pairs (open red circles) and homeologous N. tabacum gene pairs (closed black circles). Solid black line across diagonal represents no difference in gene expression level between species.

Bombarely et al. BMC Genomics 2012 13:406   doi:10.1186/1471-2164-13-406
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