Ecological speciation in sympatric palms: 3. Genetic map reveals genomic islands underlying species divergence in Howea
Resource type
Journal article
Date published
July 24, 2019
Abstract
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.
Journal title
Evolution
Publisher
Wiley
ISSN
0014-3820
eISSN
1558-5646