Mitogenomic analysis of the genus Pseudois: Evidence of adaptive evolution of morphological variation in the ATP synthase genes

► The mitochondrial genome of dwarf blue sheep (Pseudois schaeferi) was sequenced. ► The ω ratio of four mitochondrial complexes were calculated. ► ω value (0.609) of blue sheep was higher than that of dwarf blue sheep (0.046). ► The body size difference may result in the adaptive mutation in ATP synthase.