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Genetic variation of Malabar Trevally, Carangoides malabaricus in
Malaysia using mitochondrial DNA cytochrome c oxidase subunit I (COI)
Tee Say May
Supervisor: Dr Tun Nurul Aimi Binti Mat Jaafar
Bachelor of Science in Agrotechnology (Aquaculture)
School of Fisheries and Aquaculture Sciences
Carangoides malabaricus is one of the most commercialized trevally species in
Malaysia. Nevertheless, their genetic status is still remained unknown along with
constant fear of over-exploitation. Consequently, this study aims to identify their
genetic variation and population structure in Malaysia using cytochrome c oxidase
subunit I (COI) gene. The 652bp of COI gene from 67 specimens were amplified and
the finding reveals 39 haplotypes with haplotype 2 emerged as the most shared
haplotype within 22 specimens. The average haplotype diversity (h) and nucleotide
diversity (π) were 0.89000 and 0.01091 respectively with Sibu showed the lowest
among all localities. The Neighbour Joining (NJ) and Maximum Likelihood (ML) trees
showed 2 clusters with COI nucleotide divergence of 1.4%. Additionally, the FST=
0.10366, FCT= 0.12197 and FSC= -0.02086 values were proven to be low which indicate
low genetic divergence of C. malabaricus in Malaysia due to high gene flow of these
migratory species.
567 | UMT UNDERGRADUATE RESEARCH DAY 2018