Related Experiment Video
Updated: Aug 19, 2026

Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers
Published on: October 5, 2017
The complete mitochondrial DNA sequence of Atlantic cod (Gadus morhua): relevance to taxonomic studies among
1Department of Molecular Cell Biology, University of Tromso, Norway.
Abstract:
We have determined the complete sequence of an Atlantic cod (Gadus morhua) mitochondrial genome. The 16,696-bp genome contains the same 37 mitochondrial structural genes found in all other vertebrates analyzed, in an organization similar to that of the placental mammals. The cod mitochondrial DNA (mtDNA) contains variable numbers of a 40-bp heteroplasmic tandem repeat motif located in the major noncoding region, and the sequence presented here includes four repeats. Comparison among the major noncoding region in mtDNAs from different codfishes, as well as different stock samples of Atlantic cod, reveals conserved sequence features. The central region of the noncoding region as well as a spacer region located between the tRNAThr and tRNAPro genes appear to be variable in sequence, and are good candidates for high-resolution markers in population studies. Atlantic cod is the first marine bony fish whose mitochondrial genome is completely sequenced.
Related Concept Videos
Animal Mitochondrial Genetics
Comparing Mitochondrial, Chloroplast, and Prokaryotic Genomes
Evolutionary Relationships through Genome Comparisons
Multi-species Conserved Sequences
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
Modern Molecular Taxonomy
Applications of Molecular Taxonomy

