3.4 | Estimations of divergence time and demographic
history
Orchids are one of the world’s oldest flowering plants, two chloroplast
DNA sequences were used to estimate the divergence time of C.
faberi in the Qinling Mountains, our estimates indicated C.
faberi diverged from genus approximately 29.096 Ma (95% HPD = 15.573
– 42.864) during the Oligocene, as dated using BEAST (Figure 5). Of the
49 haplotypes, split between Hap7 and Hap 20 occurred about 0.7156 Ma,
whereas Hap 1, Hap 6, Hap 9, Hap 13, Hap 30 and Hap41 were estimated to
be of nearly Holocene ages.