Líffræðifélag Íslands - biologia.is
Líffræðiráðstefnan 2019

Erindi/veggspjald / Talk/poster V9

Divergence times among cod species as inferred with whole genomes

Höfundar / Authors: Matthew S. Haynsen (1), Katrín Halldórsdóttir (1), Einar Árnason (1)

Starfsvettvangur / Affiliations: 1. Faculty of Life and Environmental Sciences, University of Iceland

Kynnir / Presenter: Matthew S. Haynsen

Cod have dispersed throughout the Northern Atlantic, Northern Pacific, and Arctic Oceans where they subsequently colonized both benthic and pelagic zones and underwent multiple species divergences, with the genus Gadus presently comprised of G. morhua, G. macrocephalus, G. ogac, and G. chalcogrammus. The biogeography of these taxa involves at least two Pacific Ocean invasions from an Atlantic cod progenitor followed by a Pacific cod reinvasion of the Arctic and Atlantic Oceans. Given this complicated past, there is little surprise that their evolutionary history resembles a web, more than a tree, with the possibility of ongoing hybridization and introgression.
Through the use of whole genomes, we will estimate the divergence split times among the Gadus species. These results may inform future taxonomic treatments of cod and aid in understanding evolutionary timelines.