Increased genetic divergence between two closely related fir species in areas of range overlap
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Because of introgressive hybridization, closely related species can be more similar to each other in areas of range overlap (parapatry or sympatry) than in areas where they are geographically isolated from each other (allopatry). Here, we report the reverse situation based on nuclear genetic divergence between two fir species, Abies chensiensis and Abies fargesii, in China, at sites where they are parapatric relative to where they are allopatric. We examined genetic divergence across 126 amplified fragment length polymorphism (AFLP) markers in a set of 172 individuals sampled from both allopatric and parapatric populations of the two species. Our analyses demonstrated that AFLP divergence was much greater between the species when comparisons were made between parapatric populations than between allopatric populations. We suggest that selection in parapatry may have largely contributed to this increased divergence
Wang , J , Abbott , R J , Ingvarsson , P K & Liu , J-Q 2014 , ' Increased genetic divergence between two closely related fir species in areas of range overlap ' Ecology and Evolution , vol 4 , no. 7 , pp. 1019-1029 . DOI: 10.1002/ece3.1007
Ecology and Evolution
© 2014 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This research was supported by National Key Project for Basic Research (2014CB954100) and a Royal Society-NSF China International Joint Project award 2010/R4 to R. J. A. and J. Q. L.
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