The ratio of the number of nonsynonymous substitutions per nonsynonymous site to the number of synonymous substitutions per synonymous site of 13 PCGs among 17 species of pigeons and doves. T. curvirostra was set as a baseline.

 
 
  Part of: Xu N, Ding J, Que Z, Xu W, Ye W, Liu H (2021) The mitochondrial genome and phylogenetic characteristics of the Thick-billed Green-Pigeon, Treron curvirostra: the first sequence for the genus. ZooKeys 1041: 167-182. https://doi.org/10.3897/zookeys.1041.60150