Fig. 4
From: Landscape genomics: natural selection drives the evolution of mitogenome in penguins
Pairwise Ka/Ks comparison of sequence divergence for the 13 mitochondria protein-coding genes. a- Ka/Ks ratio between species within the Spheniscus and Pygoscelis Genera; b- Ka/Ks ration between all species of different genera. Spheniscus (Sphen): S. humboldt (Shu), S. magellanicus (Sma), S. mendiculus (Sme), S. demersus (Sde). Pygoscelis ssp.(Pygos): P. antarcticus (Pan), P. papua (Ppa), P. adelie (Pad). Eudyptula minor (Emi), Eudyptes chrysocome (Ech) and Aptenodytes forsteri (Apt)