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06-26-2014, 10:25 AM( This post was last modified: 06-26-2014, 10:30 AM by GrizzlyClaws )
Consider that the modern Sumatran tiger can have the dual ancestry, then i will also take that chance for the modern Amur tiger.
The only difference is that the Sumatran tiger is basically 50% mainland tiger + 50% island tiger.
However, the Amur tiger's ancestry might be predominantly dominated by the Caspian tiger lineage, most likely at least 90% Caspian tiger + 10% Wanhsien tiger.
We all know that when the Caspian-Amur population was thriving, the Wanhsien tiger was already on the verge of extinction.
The Caspian population that moved eastward might just absorb the remaining population, maybe breeding with their females. Since some Amur tigers do have clustered with the South Chinese/Indochinese population in term of the mtDNA. Maybe this could be the founder effect?