These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Phylogeographic analysis of complete mtDNA genomes from Walleye Pollock (Gadus chalcogrammus Pallas, 1811) shows an ancient origin of genetic biodiversity.
    Author: Carr SM, Marshall HD.
    Journal: Mitochondrial DNA; 2008 Dec; 19(6):490-6. PubMed ID: 19489135.
    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.
    [Abstract] [Full Text] [Related] [New Search]