Two closely related species differ in their regional genetic differentiation despite admixing

Schmidt, Lisanna; Fischer, Markus; Oja, Tatjana (2018). Two closely related species differ in their regional genetic differentiation despite admixing. AoB PLANTS, 10(1) Oxford University Press 10.1093/aobpla/ply007

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Regional genetic differentiation within species is often addressed in evolutionary ecology and conservation biology. Here, we address regional differentiation in two closely related hybridizing taxa, the perennial sedges Carex flava and C. viridula and their hybrid C. × subviridula in 37 populations in the north and centre of their distribution range in Europe (Estonia, Lowland (<1000 m a.s.l.) and Highland Switzerland) using 10 putative microsatellite loci. We ask whether regional differentiation was larger in the less common taxon C. viridula or whether, possibly due to hybridization, it was similar between taxa. Our results showed similar, low to moderate genetic diversity for the three studied taxa. In total, we found 12 regional species-specific alleles. Analysis of molecular variance (AMOVA), STRUCTURE and multidimensional scaling analysis showed regional structure in genetic variation, where intraspecific differentiation between regions was lower for C. flava (AMOVA: 6.84 %) than for C. viridula (20.77 %) or C. × subviridula (18.27 %) populations. Hybrids differed from the parental taxa in the two regions where they occurred, i.e. in Estonia and Lowland Switzerland. We conclude that C. flava and C. viridula clearly differ from each other genetically, that there is pronounced regional differentiation and that, despite hybridization, this regional differentiation is more pronounced in the less common taxon, C. viridula. We encourage future studies on hybridizing taxa to work with plant populations from more than one region.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Plant Ecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

Schmidt, Lisanna and Fischer, Markus

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

2041-2851

Publisher:

Oxford University Press

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

02 May 2018 13:41

Last Modified:

23 Oct 2019 19:32

Publisher DOI:

10.1093/aobpla/ply007

Uncontrolled Keywords:

Carex flava complex; genetic diversity; hybridization; microsatellites; population differentiation

BORIS DOI:

10.7892/boris.112393

URI:

https://boris.unibe.ch/id/eprint/112393

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