Kerstin Johannesson, Rui Faria, Alan Le Moan, Marina Rafajlović, Anja Marie Westram, Roger K Butlin, Sean Stankowski
Speciation is a key evolutionary process that is not yet fully understood. Combining population genomic and ecological data from multiple diverging pairs of marine snails (Littorina) supports the search for speciation mechanisms. Placing pairs on a one-dimensional speciation continuum, from undifferentiated populations to species, obscured the complexity of speciation. Adding multiple axes helped to describe either speciation routes or reproductive isolation in the snails. Divergent ecological selection repeatedly generated barriers between ecotypes, but appeared less important in completing speciation while genetic incompatibilities played a key role...
February 22, 2024: Trends in Genetics: TIG