Detection of branch-specific positive selection. Maximum likelihood approach applying CODEML for the detection of signs of positive selection along lineages, assuming the 'glob2/3 duplication-in-Sophophora subgenus' topology. An elevated omega ratio (dN/dS) was found along the branch leading to Sophophora glob2.
Gleixner et al. BMC Evolutionary Biology 2012 12:34 doi:10.1186/1471-2148-12-34