Genetic variation in and spatial structure of natural populations of Dipterocarpus alatus (Dipterocarpaceae) determined using single sequence repeat markers

• Published in: Genetics and molecular research Vol. 13; no. 3; pp. 5378 - 5386
• Main Authors: Tam, N M, Duy, V D, Duc, N M, Giap, V D, Xuan, B T T
• Format: Journal Article
• Language: English
• Published: Brazil 24-07-2014
• Subjects: Conservation of Natural Resources; Dipterocarpaceae - classification; Dipterocarpaceae - genetics; Gene Flow; Genetic Variation; Microsatellite Repeats; Phylogeny; Phylogeography; Plant Dispersal; Vietnam; Vietnam
• ISSN: 1676-5680; 1676-5680
• DOI: 10.4238/2014.July.24.17

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.