Eco‐genetic additivity of diploids in allopolyploid wild wheats

Huynh, Stella; Broennimann, Olivier; Guisan, Antoine; Felber, François; Parisod, Christian Gérard (2020). Eco‐genetic additivity of diploids in allopolyploid wild wheats. Ecology Letters, 23(4), pp. 663-673. Wiley 10.1111/ele.13466

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Underpinnings of the distribution of allopolyploid species (hybrids with duplicated genome) along spatial and ecological gradients are elusive. As allopolyploid speciation combines the range of genetic and ecological characteristics of divergent diploids, allopolyploids initially show their additivity and are predicted to evolve differentiated ecological niches to establish in face of their competition. Here, we use four diploid wild wheats that differentially combined into four independent allopolyploid species to test for such additivity and assess the impact of ecological constraints on species ranges. Divergent genetic variation from diploids being fixed in heterozygote allopolyploids supports their genetic additivity. Spatial integration of comparative phylogeography and modelling of climatic niches supports ecological additivity of locally adapted diploid progenitors into allopolyploid species which subsequently colonised wide ranges. Allopolyploids fill suitable range to a larger extent than diploids and conservative evolution following the combination of divergent species appears to support their expansion under environmental changes.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Ecological Genomics

UniBE Contributor:

Huynh, Stella and Parisod, Christian Gérard

Subjects:

500 Science > 580 Plants (Botany)

ISSN:

1461-023X

Publisher:

Wiley

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

18 Feb 2020 14:10

Last Modified:

26 May 2020 09:41

Publisher DOI:

10.1111/ele.13466

Uncontrolled Keywords:

Aegilops; amplicon sequencing; climate change; comparative niche modelling; comparative phylogeography; niche conservatism; polyploid speciation; range filling; species expansion

BORIS DOI:

10.7892/boris.140382

URI:

https://boris.unibe.ch/id/eprint/140382

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