Molecular-taxonomic investigation of the wedge clam Donax scortum (Linnaeus, 1758) from the Andaman Sea Coast of Thailand

Authors

  • Siriluck Rongprakhon Ramkhamhaeng university
  • Thamasak Yeemin
  • Charernmee Chamchoy
  • Laongdow Jungrak
  • Sittiporn Pengsakun
  • Wanlaya Klinthong
  • Manoch Wongsuryrat
  • Makamas Sutthacheep

Keywords:

Donax scortum, molecular genetics, phylogenetic tree, DNA barcoding, Andaman Sea

Abstract

The wedge clam Donax scortum (Linnaeus, 1758) is an economically important bivalve in Trang Province and its vicinity in the Andaman Sea. Based on morphological taxonomy, the dominant wedge clam along the Andaman Sea coast of Thailand was identified as D. scortum. The aim of this study was to develop specific COI primers for D. scortum as a molecular approach for reliable taxonomic identification. The wedge clam samples were collected from four localities within fishing grounds, including Hat Chao Mai and Hat Pakmeng in Trang Province, Hat Thung Talay in Krabi Province and Bo Jed Luk in Satun Province. DNA barcoding testing was conducted by sequencing the partial mitochondrial cytochrome c oxidase subunit I (COI) gene. Phylogenetic studies showed that specimens of D. scortum from all study sites were same species in the phylogenetic tree. However, possible cryptic species should be investigated by further studies using morphological and molecular genetic data to clarify their evolutionary history.  The COI gene-based investigation may not be sufficient for identification of this clam species. Future investigation on complete mitochondrial genomes may show a different explanation for the evolutionary history of D. scortum. This study provides important data for phylogenetic study of D. scortum.

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Published

2021-12-31

Issue

Vol. 1 No. 2 (2018): May – August

Section

Original Articles

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