ArticleMolecular biology and evolution2016
Variation in Linked Selection and Recombination Drive Genomic Divergence during Allopatric Speciation of European and American Aspens.
Article in Molecular biology and evolution, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.
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53 citing papers in PubMed, 103 citations in OpenAlex.
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- Chromosome-Level Genome Assembly and Whole-Genome Resequencing Revealed Contrasting Population Genetic Differentiation of Black Bream (Ecology and evolution · 2025Article
- Quaternary climatic oscillations shaped the demographic history and triggered intraspecific divergence ofFrontiers in plant science · 2025Article
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- Integrating evolutionary genomics of forest trees to inform future tree breeding amid rapid climate change.Plant communications · 2024Review
- Characterising the Genomic Landscape of Differentiation Between Annual and Perennial Rye.Evolutionary applications · 2024Article
- Investigating the role of genetic variation inEcology and evolution · 2023Article
- Genomic Insights into Adaptation to Karst Limestone and Incipient Speciation in East Asian Platycarya spp. (Juglandaceae).Molecular biology and evolution · 2023Article
- Recurrent selection and reduction in recombination shape the genomic landscape of divergence across multiple population pairs of Green-backed Tit.Evolution letters · 2023Article
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- Effects of condensed tannins on behavior and performance of a specialist aphid on aspen.Ecology and evolution · 2022Article
- Genomic insights into zokors' phylogeny and speciation in China.Proceedings of the National Academy of Sciences of the United States of America · 2022Article
- Species Persistence with Hybridization in Toad-Headed Lizards Driven by Divergent Selection and Low Recombination.Molecular biology and evolution · 2022Article
Corrections and comments
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Despite the global economic and ecological importance of forest trees, the genomic basis of differential adaptation and speciation in tree species is still poorly understood. Populus tremula and Populus tremuloides are two of the most widespread tree species in the Northern Hemisphere. Using whole-genome re-sequencing data of 24 P. tremula and 22 P. tremuloides individuals, we find that the two species diverged ∼2.2-3.1 million years ago, coinciding with the severing of the Bering land bridge and the onset of dramatic climatic oscillations during the Pleistocene. Both species have experienced substantial population expansions following long-term declines after species divergence. We detect widespread and heterogeneous genomic differentiation between species, and in accordance with the expectation of allopatric speciation, coalescent simulations suggest that neutral evolutionary processes can account for most of the observed patterns of genetic differentiation. However, there is an excess of regions exhibiting extreme differentiation relative to those expected under demographic simulations, which is indicative of the action of natural selection. Overall genetic differentiation is negatively associated with recombination rate in both species, providing strong support for a role of linked selection in generating the heterogeneous genomic landscape of differentiation between species. Finally, we identify a number of candidate regions and genes that may have been subject to positive and/or balancing selection during the speciation process.
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