title: Genetic variation and population genetic structure of Rhizophora apiculata (Rhizophoraceae) in the Greater Sunda Islands, Indonesia using microsatellite markers.
abstract: Genetic variations within and among Rhizophora apiculata populations in the Greater Sunda Islands of Indonesia were studied using microsatellite markers. The study found 38 alleles on five loci in 15 populations. The observed (H(o)) and expected (H(e)) heterozygosity values are 0.338 and 0.378, respectively. Inbreeding effect from self-pollination might explain its heterozygote deficiency. Population genetic differentiation (F(ST) = 0.381) was similar to other mangrove species. The genetic diversity of R. apiculata populations along the coastline inside the archipelago (e.g., Buleleng, Donggala, Mamuju, and Takalar) was higher than those of population along the coastline outside the archipelago, especially northern Sumatra populations (i.e., Langkat, Tapanuli Tengah, Dumai, and Padang). The isolation by distances and sea currents directions as well as their connectivity might affect the gene flow and genetic exchange. The more isolated with fewer connections by sea currents, the smaller gene flow and genetic exchange observed between populations. The higher genetic exchange, on the contrary, occurred when population location was closer to the meeting point of the sea currents. The study also showed that the patterns of sea current movement seemed to have influence genetic clustering of populations which fell into three main groups (Sunda Shelf Mangroves) and one isolated population (New Guinea Mangroves).
authors: Department of Forest Sciences and Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul, 151-921, Republic of Korea, a_fad_lee@yahoo.com.
authors: Andi Fadly
authors: AF
authors: Yahya
authors: Jung Oh
authors: JO
authors: Hyun
authors: Jae Ho
authors: JH
authors: Lee
authors: Yong Yul
authors: YY
authors: Kim
authors: Kyung Mi
authors: KM
authors: Lee
authors: Kyung Nak
authors: KN
authors: Hong
authors: Seung-Chul
authors: SC
authors: Kim
mesh_terms: D000483:Alleles; D016000:Cluster Analysis; D017753:Ecosystem; D056426:Genetic Loci; D014644:Genetic Variation; D005828:Genetics, Population; D005838:Genotype; D005843:Geography; D007214:Indonesia; D062312:Islands; D018895:Microsatellite Repeats / Q000235:genetics*; D009792:Oceans and Seas; D043982:Rhizophoraceae / Q000235:genetics*