Evolutionary rates in Nicotiana genes from different Gene Ontology groups. Non-synonymous: synonymous nucleotide subtraction ratio (ω) values for Nicotiana genes separated according to their Level 2 (A) and Level 3 (B) Biological Process, Level 2 (C) and Level 4 (D) Cellular Component and Level 2 (E) and Level 3 (F) Molecular Function Gene Ontology annotations. Omega values for comparisons between homologous N. sylvesteris and N. tomentosiformis gene pairs (black circles), N. tabacum and N. sylvesteris gene pairs (green circles) and N. tabacum and N. tomentosiformis gene pairs (red circles) are shown.
Bombarely et al. BMC Genomics 2012 13:406 doi:10.1186/1471-2164-13-406