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Journal of Biological Sciences

Year: 2016 | Volume: 16 | Issue: 1-2 | Page No.: 37-43
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Authors

Duangjai Boonkusol

Wuttipong Tongbai

Keywords

Research Article

Genetic Variation of Striped Snakehead Fish (Channa striata) in River Basin of Central Thailand Inferred from mtDNA COI Gene Sequences Analysis

Duangjai Boonkusol and Wuttipong Tongbai
Genetic variation of striped snakehead fish (Channa striata) was examined using nucleotide sequence analysis of 396 bp in mitochondria Cytochrome c oxidase subunit I (COI) of 66 samples collected from 7 natural populations in river basin of central Thailand. Sequencing of 396 bp COI fragments revealed the presence of 33 haplotypes with haplotype diversity value of 0.976 and nucleotide diversity value of 0.01810. Population specific haplotypes were observed for 19 haplotypes in samples from Lopburi (7 haplotypes), Singburi (5 haplotypes), Kamphaeng Phet (3 haplotypes) and Phichit (4 haplotypes) and shared population haplotypes were observed for 14 haplotypes in samples from Ayutthaya, Angthong, Lopburi, Singburi and Suphanburi. High genetic variability in each population were revealed from their haplotype and nucleotide diversity values. Median-joining network demonstrated that haplotype clades were not corresponding to the geographic distribution of this species. The present results suggest a high genetic variability of striped snakehead fish in this area, probably due to high gene flow between regional populations due to fish dispersal by flood and aquaculture. The newly obtained sequences are a valuable addition to the database relevant for identification of Channa species in the future.
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