Abstract
A noncoding intergenic spacer has previously been reported in mtDNA of Gadiformes. Here we present sequence information from two other cod species and variation within three species to clarify the evolution of this region. A general feature of the T-P spacer is high variation and folding into two or three hairpins. The variation among species both in structure of the region and sequence variation reflects the phylogenetic relationship of the species. A unique pattern is found within Arctic cod, Arctogadus glacialis, in which tandem repeat motifs result in new stable secondary structures. There is large variation in size of the region both within (heteroplasmy) and among individuals. A duplicated insertion is found in Greenland cod, Gadus ogac, at the same position as a corresponding duplication in Atlantic cod, Gadus morhua.
| Original language | English |
|---|---|
| Pages (from-to) | 270-277 |
| Number of pages | 8 |
| Journal | Marine Biotechnology |
| Volume | 10 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - May 2008 |
Bibliographical note
Funding Information:We thank the Icelandic Research Fund for financial support. Jørgen Schou Christiansen and Svein-Erik Fevolden, University of Tromsö, and the other participants of the TUNU I expedition to NE-Greenland 2003, made it possible to obtain the samples of Arctogadus glacialis. We thank anonymous reviewers for constructive comments.
Other keywords
- Gadoids
- Heteroplasmy
- mtDNA
- Repeats
- Secondary structure