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Young inversion with multiple linked QTLs under selection in a hybrid zone
Duke Univ, Dept Biol, Box 90338, Durham, NH 27708 USA.;Natl Taiwan Univ, Inst Ecol & Evolutionary Biol, Taipei 10617, Taiwan.;Natl Taiwan Univ, Inst Plant Biol, Taipei 10617, Taiwan..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution. Duke Univ, Dept Biol, Box 90338, Durham, NH 27708 USA.
Duke Univ, Dept Biol, Box 90338, Durham, NH 27708 USA..
Masaryk Univ, Cent European Inst Technol, Plant Cytogen Grp, Kamenice 5, CZ-62500 Brno, Czech Republic..
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2017 (English)In: NATURE ECOLOGY & EVOLUTION, ISSN 2397-334X, Vol. 1, no 5, article id UNSP 0119Article in journal (Refereed) Published
Abstract [en]

Fixed chromosomal inversions can reduce gene flow and promote speciation in two ways: by suppressing recombination and by carrying locally favoured alleles at multiple loci. However, it is unknown whether favoured mutations slowly accumulate on older inversions or if young inversions spread because they capture pre-existing adaptive quantitative trait loci (QTLs). By genetic mapping, chromosome painting and genome sequencing, we have identified a major inversion controlling ecologically important traits in Boechera stricta. The inversion arose since the last glaciation and subsequently reached local high frequency in a hybrid speciation zone. Furthermore, the inversion shows signs of positive directional selection. To test whether the inversion could have captured existing, linked QTLs, we crossed standard, collinear haplotypes from the hybrid zone and found multiple linked phenology QTLs within the inversion region. These findings provide the first direct evidence that linked, locally adapted QTLs may be captured by young inversions during incipient speciation.

Place, publisher, year, edition, pages
2017. Vol. 1, no 5, article id UNSP 0119
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Genetics
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URN: urn:nbn:se:uu:diva-344539DOI: 10.1038/s41559-017-0119ISI: 000417173100009PubMedID: 28812690OAI: oai:DiVA.org:uu-344539DiVA, id: diva2:1188377
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Swedish Research CouncilAvailable from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-07Bibliographically approved

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