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. 2015 May 27;7(7):2010–2022. doi: 10.1093/gbe/evv103

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© The Author(s) 2015. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4.— — Phylogenomic analysis of approximately 0.5-Mb Y-chromosomal sequence from 12 polar bears. Geographic origins of the polar bear individuals are denoted by AK (Alaska) and PB (Svalbard). (A) NeighborNet analysis. (B) Time-calibrated Bayesian coalescent-based phylogeny from BEAST. Numbers at nodes indicate the median of the divergence time in million years ago, with 95% highest posterior density in brackets. Dots at nodes indicate posterior probability greater than 0.99. The scale axis is in units of million years ago. Note that approximately 80% older dates were retrieved from an alternative calibration scenario (see text).