Figure 5: Comparison of putatively duplicated genes in three species of scale worms.

(a) Gene Ontology (GO) distribution of putatively duplicated genes in the three species. The triangles stand for groups only present in B. pettiboneae; the squares for groups only present in Lepidonotopodium sp.; the pentagons for groups present in both deep-sea species. (b) Significantly enriched biological process GO terms of putatively duplicated genes only present in both deep-sea species (highlighted in yellow). Boxes framed in red show terminal GO terms in both deep-sea species. Data in parentheses include the number of genes associated with the listed GO term in B. pettiboneae (first number) and Lepidonotopodium sp. (second number). A dash in parenthesis indicates absence of the gene. Arrows represent the connection between two enriched GO terms at different levels. Only selected significantly enriched GO branches in deep-sea species are shown to illustrate the interspecific differences with shallow-water species.