Molecular phylogeny of marine pearl oyster (Bivalves Pteriidae) along the Andaman Coast of Thailand

Name: Supannee Somrup

LCSH: Kasetsart University -- Theses. M.S. (Fishery Science and Technology) 2022

Classification :.LCCS: QL430.7.P77

LCSH: Kasetsart University. -- Department of Fisheries -- Theses

LCSH: Pearl oysters -- Phylogeny

LCSH: Pearl oysters -- Thailand -- Andaman Sea

Abstract: The pearl oysters (Bivalvia: Pteriidae) are one of the most important aquaculture species in Thailand. Many species are widely distributed on the Andaman coast of Thailand with high diversity in morphology. Therefore, the integration of genetic information with morphological analysis would benefit the precise identification of their species and the resolution of the phylogeny. This study aimed to investigate the species diversity and molecular phylogeny of pearl oysters from Phuket Island using a combined of morphological and genetic data (mitochondrial COI, 16S rRNA, and nuclear 18S rRNA and ITS1). A total of 80 samples was collected from Dok Mai Island, Phuket Province, western Thailand. The results of morphological and genetic investigation were congruent and suggested that at least four different species, including Pteria penguin, Pinctada maxima, Pinctada sp.1, and Pinctada sp.2, were found from recently collected samples. Pinctada sp.1 is closely related to Pinctada margaritifera and Pinctada mazatlanica, however, they genetically differ by at least 3% for 16S rRNA and 4% for COI genes. While Pinctada sp.2 is evolutionally closely associated with Pinctada albina and Pinctada nigra, and it is distinguished from these two species by 8% for COI, 1.5% for ITS1, and 0.4% for 18S rRNA. The results showed a higher genetic divergence for COI followed by 16S rRNA, ITS1, and 18S rRNA. Furthermore, Pinctada sp.1 and Pinctada sp.2 are relatively distinct morphologically from other Pinctada species by their anterior portion, and posterior border of shell, hinge line, and teeth. This present study highlights the high endemism of Pinctada species from the Andaman coast of Thailand and suggests the COI as an effective genetic marker for species identification of Pinctada species. Additionally, further study is warranted to clarify the taxonomic status of Pinctada sp.1 and Pinctada sp.2.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Narongrit Muangmai

Role: Thesis Advisor

Name: Shikai Liu

Role: Thesis CO-Advisor

Created: 2022

Modified: 2025-07-20

Issued: 2025-07-20

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2565/supannee-som-all.pdf

CallNumber: QL430.7.P77 .S87

eng

Spatial: Thailand Andaman Sea

DegreeName: Master of Science

Level: Master's Degree

Descipline: Fishery Science and Technology

Grantor: Kasetsart University

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