Fig. 4

Gene expansion of terpenoid backbone biosynthesis in ginkgo. a Backbone pathways of terpenoid biosynthesis and enriched genes in ginkgo. Genes names shaded in green apparently underwent expansion in ginkgo based on comparison with S. moellendorffii, P. canariensis, C. revoluta, A. thaliana and O. sativa. Gene names shaded in purple apparently underwent expansion in ginkgo based on comparison with all released plant genomes in the KEGG database. Expansion in both K03526 and K01641 gene families was suggested by both comparisons. b The number of each gene in the pathways of all released plant genomes in the KEGG database. Genes in purple and green shadow correspond to expansions as described in (a). Full names for species can be found at http://www.genome.jp/kegg/catalog/org_list.html