Mitochondrial genomes reveal rapid evolution of bears
Author Information
Author(s): Krause Johannes, Unger Tina, Noçon Aline, Malaspinas Anna-Sapfo, Kolokotronis Sergios-Orestis, Stiller Mathias, Soibelzon Leopoldo, Spriggs Helen, Dear Paul H, Briggs Adrian W, Bray Sarah CE, O'Brien Stephen J, Rabeder Gernot, Matheus Paul, Cooper Alan, Slatkin Montgomery, Pääbo Svante, Hofreiter Michael
Primary Institution: Max Planck Institute for Evolutionary Anthropology
Hypothesis
What are the phylogenetic relationships among the bear family (Ursidae) based on mitochondrial genome sequences?
Conclusion
The study found evidence for a rapid radiation of bears around 5 million years ago at the Miocene-Pliocene boundary.
Supporting Evidence
- The study sequenced mitochondrial genomes from all eight living and two recently extinct bear species.
- Phylogenetic analyses showed a well-resolved topology for bears.
- The cave bear genome is the first determined from a Pleistocene sample obtained from a non-permafrost environment.
- Molecular dating suggests a rapid radiation of bears around 5 million years ago.
Takeaway
Scientists studied the DNA of bears to understand how they evolved and found that many types of bears appeared quickly around 5 million years ago.
Methodology
The study used complete mitochondrial genome sequences from ten bear species, including both living and extinct species.
Limitations
The study's conclusions are based on mitochondrial DNA, which may not capture the full complexity of bear evolution.
Statistical Information
P-Value
0.147
Confidence Interval
26.5–47.4 Ma
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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