Figure 5

Possible evolutionary scenarios of the previously-annotated isoforms that exclude the novel exons (ASV1) and the newly-identified isoforms that include the novel exons (ASV2) during the evolution of rice transcriptome. (A) Both isoforms (ASV1 and ASV2) might have been present in the common ancestral transcriptome of grass plants. (B) A gain-of-ASV event might occur after the divergence of rice and non-rice plants. (C) Comparison of ds values of novel exons and their corresponding flanking exons.