Phylogenetic Relationship Among Seven River Nile Teleostei Species.pdf

- Purpose: To analyze sequence variances and phylogenetic relationships among seven River Nile teleostei species using partial mitochondrial cytochrome-b gene sequences.
- Species Studied: Schilbe mystus, Barbus bynni, Oreochromis niloticus, Bagrus bajad, Mormyrus kannume, Lates niloticus, and Clarias gariepinus.
- Methodology:
- DNA extraction from fish muscle tissues.
- PCR amplification of the mitochondrial cytochrome-b gene using specific primers.
- Sequencing of PCR products and alignment with reference sequences.
- Phylogenetic analysis using Maximum Likelihood (ML) and Unweighted Pair Group Method with Arithmetic Mean (UPGMA) methods.
- Findings:
- A three-nucleotide deletion in Siluriformes catfish sequences.
- Similar nucleotide composition to actinopterygian fishes.
- High variation at the nucleic level, supporting the gene's suitability as a DNA marker.
- Close genetic relationship among teleost actinopterygian River Nile fish species.
- Close genetic and evolutionary relation of early divergent orders: Acipenseriforms (Sturgeons) and Semionotiformes (Alligator gars).
- Implications: New sequence data could contribute to successful fish management, conservancy, and aquaculture objectives. Additional DNA sequences from other River Nile teleost family representatives could enhance future fish molecular phylogeny studies.