Abstract
Dipterocarpus alatus (Dipterocarpaceae) is widely distributed in lowland forests in central and southern Vietnam, Cambodia, Laos, Myanmar, Philippines, Thailand, and India. Due to over-exploitation and habitat destruction, the species is now threatened. The genetic variation within and among populations of D. alatus was investigated on the basis of 9 microsatellite (single sequence repeat, SSR) loci. In all, 268 sampled trees from 10 populations in central and southern Vietnam were analyzed in this study. The SSR data showed a high genetic variability within populations with an average of HO = 0.209 and HE = 0.239. Genetic differentiation among populations was high (FST = 0.266), indicating limited gene flow (Nm = 0.69). Analysis of molecular variance showed that most genetic variation was within populations (74.96%). This study highlights the importance of conserving the genetic resources of D. alatus species.
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