Fig. 5.

Ancestral state reconstruction of the parrot mitochondrial control region duplications on the Bayesian tree under the maximum likelihood criterion using the MK1 model. White circles indicate species classified as having a single mitochondrial control region by the PCR fragment length analysis and/or sequencing. Black circles indicate species classified as having a duplicated mitochondrial control region. Gray circles indicate an unscorable state at the terminals and ambiguous ancestral states at interior nodes. The circles at nodes toward the interior of the tree are representative of the likelihood of each state at that node. * = GenBank sequences, ^ = species sequenced at BR, ° = related species sequenced at BR, + = species sequenced at NMSU and α = species that have published gene orders. Letters to the right indicate clades defined by a single origin event.