Polar Bears Exhibit Genome-Wide Signatures of Bioenergetic Adaptation to Life in the Arctic Environment

  title={Polar Bears Exhibit Genome-Wide Signatures of Bioenergetic Adaptation to Life in the Arctic Environment},
  author={Andreanna J. Welch and Oscar C. Bedoya-Reina and Lorenzo Carretero-Paulet and Webb Miller and Karyn D Rode and Charlotte Lindqvist},
  booktitle={Genome biology and evolution},
Polar bears (Ursus maritimus) face extremely cold temperatures and periods of fasting, which might result in more severe energetic challenges than those experienced by their sister species, the brown bear (U. arctos). We have examined the mitochondrial and nuclear genomes of polar and brown bears to investigate whether polar bears demonstrate lineage-specific signals of molecular adaptation in genes associated with cellular respiration/energy production. We observed increased evolutionary rates… CONTINUE READING
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