Andersson, Leif
- Department of Animal Biosciences, Swedish University of Agricultural Sciences
- Texas A&M University
- Uppsala University
Abstract
Homoploid hybrid speciation in animals has been inferred frequently from patterns of variation, but few examples have withstood critical scrutiny. Here we report a directly documented example, from its origin to reproductive isolation. An immigrant Darwin's finch to Daphne Major in the Galapagos archipelago initiated a new genetic lineage by breeding with a resident finch (Geospiza fortis). Genome sequencing of the immigrant identified it as a G. conirostris male that originated on Espanola >100 kilometers from Daphne Major. From the second generation onward, the lineage bred endogamously and, despite intense inbreeding, was ecologically successful and showed transgressive segregation of bill morphology. This example shows that reproductive isolation, which typically develops over hundreds of generations, can be established in only three.
Published in
Science
2018, volume: 359, number: 6372, pages: 224-227
Publisher: AMER ASSOC ADVANCEMENT SCIENCE
SLU Authors
UKÄ Subject classification
Evolutionary Biology
Publication identifier
- DOI: https://doi.org/10.1126/science.aao4593
Permanent link to this page (URI)
https://res.slu.se/id/publ/93461