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Träfflista för sökning "WFRF:(Janke E) srt2:(2012-2014)"

Sökning: WFRF:(Janke E) > (2012-2014)

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1.
  • Hailer, Frank, et al. (författare)
  • Nuclear Genomic Sequences Reveal that Polar Bears Are an Old and Distinct Bear Lineage
  • 2012
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 1095-9203 .- 0036-8075. ; 336:6079, s. 344-347
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent studies have shown that the polar bear matriline (mitochondrial DNA) evolved from a brown bear lineage since the late Pleistocene, potentially indicating rapid speciation and adaption to arctic conditions. Here, we present a high-resolution data set from multiple independent loci across the nuclear genomes of a broad sample of polar, brown, and black bears. Bayesian coalescent analyses place polar bears outside the brown bear clade and date the divergence much earlier, in the middle Pleistocene, about 600 (338 to 934) thousand years ago. This provides more time for polar bear evolution and confirms previous suggestions that polar bears carry introgressed brown bear mitochondrial DNA due to past hybridization. Our results highlight that multilocus genomic analyses are crucial for an accurate understanding of evolutionary history.
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2.
  • Hailer, F., et al. (författare)
  • Response to comment on "Nuclear genomic sequences reveal that polar bears are an old and distinct bear lineage"
  • 2013
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 340:6127, s. 1522-b
  • Tidskriftsartikel (refereegranskat)abstract
    • Nakagome et al. reanalyzed some of our data and assert that we cannot refute the mitochondrial DNA-based scenario for polar bear evolution. Their single-locus test statistic is strongly affected by introgression and incomplete lineage sorting, whereas our multilocus approaches are better suited to recover the true species relationships. Indeed, our sister-lineage model receives high support in a Bayesian model comparison.
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