Phylogeny of the Camelidae species based on maximum likelihood analysis of cytb sequences. To estimate the divergence time, pairwise comparisons of cow-pig and mouse-rat were taken as the ingroup and outgroup calibration points, respectively. All nodes were supported by the bootstrap value (1000 replications) on the nodes.
Cui et al. BMC Genomics 2007 8:241 doi:10.1186/1471-2164-8-241