• ๋Juthamas Suppapan Faculty of Education, Nakhon Si Thammarat Rajabhat University
  • Verakiat Supmee Faculty of Science and Technology, Rajamangala University of technology Srivijaya
  • Phatthanaporn Rinthajak Khaonan Nationnal Park


parah tree, genetic diversity, Nakhon Si Thammarat


The parah tree (Elateriospermum tapos) is a species of forest and tree found in the Noppitum district, Nakhon Si Thammarat Province. At present, the number of trees has decreased due to deforestation. Therefore, genetic information should be available for use in management planning. The objectives of this research were (1) to analyze the genetic diversity of the parah trees, (2) to analyze the population genetic structure of the parah trees, and (3) to analyze the demographic history of the parah trees in the Noppitum district, Nakhon Si Thammarat Province. Leave samples were collected from four localities in the Noppitum district (natural forest: Huay lek, Hin Tor Waterfall, planted forest: Hin Tor Waterfall, Sunantha Waterfall). DNA was extracted and nucleotide sequences were analyzed from gene ribulose-bisphosphate carboxylase (rbcL) in chloroplast DNA. To analyze data, nucleotide sequences of parah trees from Malaysia and Brunei in National Center for Biotechnology Information (GenBank) were used for analysis. The total nucleotide sequence was 121 sequences. The result showed 3 haplotypes. The haplotype diversity was in the range of 0.000-0.667 and the nucleotide diversity was in the range of 0.00000-0.00103. The result of the study of population genetic structure shows that dividing the population into two groups (Noppitum group and MalayBrunei group). Results of the demographic history study found that the parah tree population in the Noppitum district has not expanded the population size.


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บทความวิจัย (Research Article)