title: d(N)/d(S) does not show positive selection drives separation of polar-tropical SAR11 populations.
authors.forename: Haiwei
authors.initials: H
authors.lastname: Luo
authors.forename: Austin L
authors.initials: AL
authors.lastname: Hughes
mesh_terms: D020561:Alphaproteobacteria / Q000235:genetics*; D016680:Genome, Bacterial / Q000528:radiation effects*; D054892:Metagenome / Q000528:radiation effects*; D008954:Models, Biological; D012623:Seawater / Q000382:microbiology*