Phylogenetic relationships of fish OR genes. The Bayesian phylogenetic tree was constructed using Mrbayes 3.1.2. Representative type 1 and type 2 vertebrate OR genes are shown, including 109 Larimichthys crocea OR genes and 121 relevant OR genes from other eleven vertebrates. Two sequences from amphioxus are used as an outgroup. The posterior probabilities are given for each node in the tree. The scale bar represents 0.3 substitutions. The light and dark yellow shading in the circular tree represent type 1 and 2 genes, respectively. The OR gene group names are shown on the outside of each clade.
Zhou et al. BMC Evolutionary Biology 2011 11:237 doi:10.1186/1471-2148-11-237