A beak size locus in Darwin’s finches facilitated character displacement during a drought
2016 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 352, no 6284, 470-474 p.Article in journal (Refereed) Published
Ecological character displacement is a process of morphological divergence that reducescompetition for limited resources. We used genomic analysis to investigate the geneticbasis of a documented character displacement event in Darwin’s finches on Daphne Majorin the Galápagos Islands: The medium ground finch diverged from its competitor, the largeground finch, during a severe drought. We discovered a genomic region containing theHMGA2gene that varies systematically among Darwin’s finch species with different beaksizes. Two haplotypes that diverged early in the radiation were involved in the characterdisplacement event: Genotypes associated with large beak size were at a strong selectivedisadvantage in medium ground finches (selection coefficients= 0.59). Thus, a majorlocus has apparently facilitated a rapid ecological diversification in the adaptive radiationof Darwin’s finches.
Place, publisher, year, edition, pages
2016. Vol. 352, no 6284, 470-474 p.
Genetics and Breeding
IdentifiersURN: urn:nbn:se:uu:diva-279968DOI: 10.1126/science.aad8786ISI: 000374479700050PubMedID: 27102486OAI: oai:DiVA.org:uu-279968DiVA: diva2:909305
FunderKnut and Alice Wallenberg FoundationSwedish Research Council, 80576801Swedish Research Council, 70374401