Genetic Structure Analysis of Freshwater Fish Cirrhinus mrigala by Mitochondrial COI Gene
Genetic Structure Analysis of Freshwater Fish Cirrhinus mrigala by Mitochondrial COI Gene
Shahid Sherzada1,2*, Muhammad Naeem Khan1 and Masroor Ellahi Babar2
ABSTRACT
The current study aimed at genetic analysis of by Cirrhinus mrigala using mitochondrial DNA marker cytochrome oxidase I (COI). Genomic DNA isolated from whole blood was used to amplify and sequence a short region of COI gene in mitochondrial DNA. The identification of sequenced samples was done by NCBI (98-99%) and BOLD (99%) databases. The sequence data analysis represented 15 variable polymorphic sites and 4 haplotypes. Mean haplotypes and nucleotide diversity was 0.42 and 0.0018, respectively. The mean intraspecific and intragenric K2P genetic distances were 0.2% and 1.2%, respectively. Rate of transitional and transversional substitution was 16.68% and 4.16%, respectively. The transition/transversion bias value R was 1.25. The negative values of Tajima D test as well as Fu and Li D and F tests supported the process of population expansion with excess of rare alleles. The overall results showed a lack of neutral evolution and low genetic differentiation among populations of C. mrigala.
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