Increased genetic divergence between two closely related fir species in areas of range overlap
Article first published online: 3 MAR 2014
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Ecology and Evolution
Volume 4, Issue 7, pages 1019–1029, April 2014
How to Cite
Ecology and Evolution 2014; 4(7):1019–1029
- Issue published online: 7 APR 2014
- Article first published online: 3 MAR 2014
- Manuscript Accepted: 30 JAN 2014
- Manuscript Revised: 28 JAN 2014
- Manuscript Received: 4 JAN 2014
- National Key Project for Basic Research. Grant Number: 2014CB954100
- Royal Society-NSF China International Joint Project. Grant Number: 2010/R4
- Chinese Scholarship Council
- Abies chensiensis ;
- Abies fargesii ;
- genetic divergence;
- natural selection;
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.