Character-based Diagnostic Keys, Molecular Identification and Phylogenetic Relationships of Fishes based on Mitochondrial Gene from Pulicat Lake, India: A Tool for Conservation and Fishery Management Purposes Rathipriya A.1, Kathirvelpandian A.1,2,*, Shanmugam S.A.1, Uma A.3, Suresh E.1, Felix N.4 1Institute of Fisheries Postgraduate Studies, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, OMR Campus, Vaniyanchavadi-603 103, Chennai, Tamil Nadu, India. 2Presently at ICAR-National Bureau of Fish Genetic Resources, PMFGR Centre, Kochi-682 018, Kerala, India. 3Dr. M.G.R. Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Ponneri-601 204, Chennai, Tamil Nadu, India. 4Directorate of Incubation and Vocational Training in Aquaculture, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, ECR-Muttukadu-603 112, Chennai, Tamil Nadu, India. *Corresponding Author: A. Kathirvelpandian, ICAR-National Bureau of Fish Genetic Resources, PMFGR Centre, Kochi-682 018, Kerala, India, Email: kathirars@gmail.com
Online Published on 02 September, 2022. Abstract Background Pulicat Lake is one of India's most valuable ecosystems. Correct species identification is essential for the conservation and management of finite resources. Molecular signatures and character-based keys could be used for faster identification. This will be a powerful tool to obtain a significant amount of accurate information quickly and conveniently and could be used for forensic applications and the conservation of fish in Indian waters. Methods In addition to morphological identification, the species were identified using various approaches, such as Neighbourjoining (NJ), Maximum Likelihood (ML) trees and the Character-based method. For each species, the LOGic (BLOG 2.0) DNA Barcode analysis method was used to identify different positions of key diagnostic nucleotides in a given set. Result DNA barcodes were generated from twenty-nine species of fish representing seven orders, 26 genera and 21 families in this study. The current study's findings show that the 16S rRNA barcodes facilitated successful fish species identification and also provided phylogenetic information to differentiate the fishes. The character-based molecular diagnostic keys for fishes were also developed in-silico from the data set comprising 393 mitochondrial 16S rRNA sequences including the sequences generated in the present study and other published resources. Top Keywords BLOG 2.0, DNA chip, In-silico analysis, Mitochondrial 16S rRNA gene, Pulicat lake. Top |