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. Author manuscript; available in PMC: 2015 Dec 14.
Published in final edited form as: Curr Biol. 2011 Jul 7;21(15):1251–1258. doi: 10.1016/j.cub.2011.05.058

Figure 4. Three Hypothetical Scenarios Describing the Divergence between Brown Bear and Polar Bear Matrilines.

Figure 4

(A) Recent speciation.

(B) Medium speciation plus multiple hybridization events.

(C) Ancient speciation plus more recent hybridization.

The branching order of the bear matrilines is based on the MCC tree in Figure 1. Colored background shading indicates the hypothetical polar bear (blue) and brown bear (yellow) autosomal lineages.