Phylogeny of MSNT-1a and -1b genes. The topology for the myostatin 1a and 1b genes is shown here. The phylogeny was constructed using MrBayes 3.2 . The tree was rooted with R. retropinna. Branches colored in red showed a statistically significant dN/dS value for the foreground branch over the background as indicated in Table 4. Branches are labeled as the foreground branch followed by the posterior probability of the branch.