Rapid hybrid speciation in Darwin's finches

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 Galápago...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2018-01, Vol.359 (6372), p.224-228
Hauptverfasser: Lamichhaney, Sangeet, Han, Fan, Webster, Matthew T, Andersson, Leif, Grant, B Rosemary, Grant, Peter R
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container_issue 6372
container_start_page 224
container_title Science (American Association for the Advancement of Science)
container_volume 359
creator Lamichhaney, Sangeet
Han, Fan
Webster, Matthew T
Andersson, Leif
Grant, B Rosemary
Grant, Peter R
description 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 Galápagos archipelago initiated a new genetic lineage by breeding with a resident finch ( ). Genome sequencing of the immigrant identified it as a male that originated on Española >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.
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source Science Magazine; JSTOR Archive Collection A-Z Listing
subjects Breeding
Document reproduction
Evolutionary Biology
Evolutionsbiologi
Gene sequencing
Genetic analysis
Genetic markers
Genomes
Hybridization
Inbreeding
Indigenous species
Natural selection
Pedigree
Reproduction (biology)
Reproductive isolation
Speciation
title Rapid hybrid speciation in Darwin's finches
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