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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology
Koichi Kamiya
Faculty of Agriculture Ehime University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

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Population Genetics of the Critically Endangered Species Dipterocarpus littoralis Blume (Dipterocarpaceae) Endemic on Nusakambangan Island, Indonesia Fifi Gus Dwiyanti; Ko Harada; Iskandar Zulkarnaen Siregar; Koichi Kamiya
BIOTROPIA - The Southeast Asian Journal of Tropical Biology Vol. 21 No. 1 (2014)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (17150.467 KB) | DOI: 10.11598/btb.2014.21.1.304

Abstract

Background Dipterocarpus littoralis Blume is a critically endangered dipterocarp species found only on Nusakambangan Island, Central Java, Indonesia. Patterns of genetic diversity and population genetic structure of adults and saplings in two extant populations (Kali Jati and Solok Besek) were estimated using ten microsatellite markers. Results A total of 39 alleles was found, with two and four alleles being unique in adult and sapling populations, respectively. Allelic richness and heterozygosity was similar between adult (Ar = 3.00; He = 0.423) and sapling (Ar = 3.25; He = 0.441) populations.Inbreeding coefficientsin saplingswere positive in both populations and statistically significant in Kali Jati, while those in adult populations were not significantly different from zero, indicating excessive inbreeding and selfing in the sapling populations. Genetic differentiation of the sapling populations (FST = 0.036) was slightly lower than in the adult populations (0.050), but only significantly so for saplings.Conclusions This study revealed that D. littoralis has low genetic diversity in both adults and saplings. Similarly low values in allele richness and heterozygosity suggest that reductions of population size have been ongoing for long periods in this species. Significant genetic differentiation between sapling populations but not adult populations indicates that recent fragmentation is further accelerating the isolation process.
Co-Authors Fifi Gus Dwiyanti ISKANDAR ZULKARNAEN SIREGAR Ko Harada