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Ecological speciation in sympatric palms: 3. Genetic map reveals genomic islands underlying species divergence in Howea
Author(s) -
Papadopulos Alexander S. T.,
Igea Javier,
Dunning Luke T.,
Osborne Owen G.,
Quan Xueping,
Pellicer Jaume,
Turnbull Colin,
Hutton Ian,
Baker William J.,
Butlin Roger K.,
Savolainen Vincent
Publication year - 2019
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/evo.13796
Subject(s) - sympatric speciation , biology , gene flow , genetic algorithm , ecological speciation , evolutionary biology , sympatry , genetic divergence , ecology , divergence (linguistics) , gene , genetic variation , genetics , genetic diversity , population , linguistics , demography , philosophy , sociology
Although it is now widely accepted that speciation can occur in the face of continuous gene flow, with little or no spatial separation, the mechanisms and genomic architectures that permit such divergence are still debated. Here, we examined speciation in the face of gene flow in the Howea palms of Lord Howe Island, Australia. We built a genetic map using a novel method applicable to long‐lived tree species, combining it with double digest restriction site–associated DNA sequencing of multiple individuals. Based upon various metrics, we detected 46 highly differentiated regions throughout the genome, four of which contained genes with functions that are particularly relevant to the speciation scenario for Howea , specifically salt and drought tolerance.