PHYLOGEOGRAPHIC STRUCTURE OF THE COMMERCIALLY IMPORTANT TROPICAL TREE SPECIES, DRYOBALANOPS AROMATICA GAERTN. F. (DIPTEROCARPACEAE) REVEALED BY MICROSATELLITE MARKERS
ABSTRACT: Phylogeographic
structure of the commercially important tropical tree species Dryobalanops
aromatica Gaertn. F. (Dipterocarpaceae) revealed by microsatellite markers. Reinwardtia
14(1): 4 3 - 5 1 . — Dryobalanops aromatica Gaertn. F. (Kapur) is an
economically important timber species in Southeast Asia that can serve as a
good model for studying the impact of the Pleistocene glaciations on the genetic
diversity and distribution of species in tropical regions. Seven polymorphic
microsatellite markers were analyzed in five natural populations of D.
aromatica (N = 120 individuals): Gunung Panti in Malay Peninsula, Lingga Island
in Lingga Archipelago, Lambir Hills National Park, Limbang and Similajau
National Park in Borneo. The level of gene diversity (H E ) for the five
populations was relatively high with a range from 0.571 (Similajau) to 0.729 (
Gunung Panti). The high genetic diversity in the present study could be
attributed to the larger refugia population sizes of D. aromatica than that of
other species. The population genetic structure revealed two distinct groups:
the Malay Peninsula-Lingga Archipelago and Borneo. This pattern suggests that populations
in each geographical area might be the consequence of post-glacial expansion
from one or two refugia, but that gene flow between different glacial refugia was
fairly restricted.
keywords: Dryobalanops
aromatica, microsatellite, phylogeography, genetic diversity, genetic structure
Author: FIFI GUS DWIYANTI, KOICHI
KAMIYA, KO HARADA
Journal Code: jpbiologigg140014
