Excavating ghost footprints and tangled trees from modern genomes. Issue 14 (4th August 2019)

• Record Type: Journal Article
• Authors: Jacobs, Arne; Therkildsen, Nina Overgaard
• Is Part Of: Molecular ecology. Volume 28:Issue 14(2019)
• Page Start: 3287
• Page End: 3290
• Publication Date: 2019-08-04
• Subjects: admixture -- archaic ancestry -- evolutionary history -- ghost populations; Molecular ecology -- Periodicals; Molecular population biology -- Periodicals; 576
• DOI: 10.1111/mec.15141
• Languages: English
• ISSNs: 0962-1083

Abstract

Abstract : Due to pervasive gene flow and admixture, simple bifurcating trees often do not provide an accurate representation of relationships among diverging lineages, but limited resolution in the available genomic data and the spatial distribution of samples has hindered detailed insights regarding the evolutionary and demographic history of many species and populations. In this issue of Molecular Ecology, Foote et al. (2019) combine a powerful sampling design with novel analytical methods adopted from human genetics to describe previously unrecognized patterns of recurrent vicariance and admixture among lineages in the globally distributed killer whale ( Orcinus orca ). Based on sequence data from modern samples alone, they discover clear signatures of ancient admixture with a now extinct "ghost" lineage, providing one of the first accounts of archaic introgression in a nonhominid species. Coupling a cost‐effective sequencing strategy with novel analytical approaches, their paper provides a roadmap for advancing inference of evolutionary history in other nonmodel species, promising exciting times ahead for our field.