12
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Phylogeographic analysis of complete mtDNA genomes from Walleye Pollock (Gadus chalcogrammus Pallas, 1811) shows an ancient origin of genetic biodiversity.

      Mitochondrial DNA
      Animals, Biodiversity, DNA, Mitochondrial, genetics, Electron Transport Complex IV, Evolution, Molecular, Fish Proteins, Gadiformes, classification, Gadus morhua, Genome, Mitochondrial, Haplotypes, Japan, Norway, Pacific Ocean, Phylogeny, Species Specificity, Time Factors

      Read this article at

      ScienceOpenPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Ursvik et al. compared the complete mitochondrial DNA (mtDNA) genome sequences of Walleye Pollock (Gadus ( = Theragra) chalcogrammus) from the Pacific Ocean with a pair of fish from an isolated population of Norwegian pollock in the Barents Sea. They concluded that the Norwegian population was recently introduced from the Pacific. We test this hypothesis within a temporal framework provided by a phylogeographic analysis of complete genomes from the pollocks' sister species, Atlantic Cod (Gadus morhua), and their divergence 3.5 mya. Pollock have a coalescent ancestor 189 +/- 25 kya. The two Norwegian fish have a common ancestor 87 +/- 7 kya, which suggests an ancient origin rather than a recent human-mediated introduction. Mitochondrial genomic biodiversity in pollock antedates the most recent glacial cycle. The clade structure of the whole-genome tree indicates that previously described single-locus mtDNA haplotypes and haplogroups are typically paraphyletic.

          Related collections

          Author and article information

          Comments

          Comment on this article