Abstract
Channidae family, are major freshwater fish species amongst the local aquatic fauna of Pakistan, while, there is limited availability of local data on their molecular identification and phylogenetic analysis. Channa species were collected from four different geographical sites in the tertiary of Punjab province on the Indus and Chenab rivers of Pakistan. Morphometric records and molecular techniques were used to determine the intraspecific variations among populations of Channa marulius. Mitochondrial DNA was extracted from the flesh of C. marulius, while, COI gene was used for molecular identification and variation levels were estimated by using Principal Component Analysis. Data recorded on the basis of morphometric parameters clearly divided the C. marulius of different locations into two distinct categories, which accounted for a cumulative variability of 97.6%. Non-significance (P < 0.05) among the C. marulius showed that it contains a unique control haplotype localized within the sub-population. The intra-species distance ranged from 0.000 to 0.001 for four different populations, in contrast, the sequences retrieved from the NCBI database exhibited a range span of 0.000-0.003, while, sequence diversity ranged from 0.000 to 0.006 for this intra-specific comparison. The cladogram was also constructed for C. marulius of different geographical locations for observation of phylogenetic relationship. The conclusion drawn from the phylogenetic analysis of C. marulius populations used in this study, contributes significantly to the understanding of genetic variations within populations of this species. The findings provide valuable insight to devise conservation strategies in fisheries management programs in Pakistan.
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