Population samples
A totally of 121 foliage samples were collected, 43 samples from five
populations for C. bifida and 78 samples from nine populations
for C. micholitzii , respectively (Table S1). Since there are only
three C. bifida individuals in population BT, and four C.
micholitzii individuals in two populations from Laos (L and W), we
didn’t perform microsatellite genotyping of the above three populations
as more than six individuals per population was required in
microsatellite data processing. We kept the leave materials in
environmentally-friendly poly (ethylene terephalate) a non-woven fabric
bags and dried them with silica gel immediately. All samples were stored
at -20°C until they were processed.