Article
Nuclear genomic sequences reveal that polar bears are an old and distinct bear lineage.
Science (New York, N.Y.) - 20 Apr 2012
Hailer Frank, Kutschera Verena E, Hallström Björn M, Klassert Denise, Fain Steven R, Leonard Jennifer A, Arnason Ulfur, Janke Axel
Abstract excerpt
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...
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