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dc.contributor.author
Baltisberger, Matthias
dc.contributor.author
Hörandl, Elvira
dc.date.accessioned
2019-12-02T16:53:04Z
dc.date.available
2017-06-12T02:06:11Z
dc.date.available
2019-12-02T16:53:04Z
dc.date.issued
2016-02
dc.identifier.other
10.1016/j.ppees.2015.11.001
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/113789
dc.identifier.doi
10.3929/ethz-b-000113789
dc.description.abstract
Karyotype evolution can be reconstructed by the characterization of chromosome morphology, based on the position of centromeres. Different karyotypes often reflect speciation events within phylogenies as they can establish crossing barriers between species. Hence, evolution of karyotypes often is congruent with splits and differentiation of clades within phylogenies of angiosperm genera. Here we study karyotype evolution in the big cosmopolitan genus Ranunculus and in related genera to test the hypothesis that karyotypes are congruent with major clades. We investigated karyotypes on mitoses of 36 species, evaluated literature records for additional 87 species, and reconstructed ancestral states by mapping karyotypes onto a published molecular phylogenetic tree. Altogether ten karyotypes can be discriminated as character states, eight based on the base number x = 8, and two on the base number x = 7. The ancestral type within Ranunculus is characterized by four metacentric and four submetacentric/subtelocentric chromosomes, and dominates in five major basal clades of Ranunculus (R. subg. Auricomus) and in four of the related genera (Coptidium, Halerpestes, Kumlienia, and Trautvetteria). Another four karyotypes are ancestral and predominant in two major clades within Ranunculus (R. subg. Ranunculus), while three further ones occur only on terminal branches of the buttercup phylogeny. Among related genera, Ficaria and Ceratocephala also show derived karyotypes. Karyotype morphology thus supports generic and infrageneric classifications based on molecular and morphological data. Karyotype evolution drives in general to increasing number of chromosomes with asymmetric arms, and to a reduction from x = 8 to x = 7 chromosomes. A review of interspecific homoploid hybridization in sympatric species, and of crossing experiments suggests enhanced crossability of species with the same karyotype and strong crossing barriers between those with different karyotypes. We conclude that karyotype evolution is a major driver of speciation and differentiation of clades within Ranunculus.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.rights.uri
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Chromosome numbers
en_US
dc.subject
Hybridization
en_US
dc.subject
Karyotype evolution
en_US
dc.subject
Phylogenetic relevance
en_US
dc.subject
Ranunculus
en_US
dc.title
Karyotype evolution supports the molecular phylogeny in the genus Ranunculus (Ranunculaceae)
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
dc.date.published
2015-11-10
ethz.journal.title
Perspectives in Plant Ecology, Evolution and Systematics
ethz.journal.volume
18
en_US
ethz.pages.start
1
en_US
ethz.pages.end
14
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.identifier.nebis
001976957
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02720 - Institut für Integrative Biologie / Institute of Integrative Biology::03706 - Widmer, Alexander / Widmer, Alexander
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02720 - Institut für Integrative Biologie / Institute of Integrative Biology::03706 - Widmer, Alexander / Widmer, Alexander
ethz.date.deposited
2017-06-12T02:09:45Z
ethz.source
ECIT
ethz.identifier.importid
imp5936542f2295e51113
ethz.ecitpid
pub:175523
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-07-13T09:16:41Z
ethz.rosetta.lastUpdated
2019-12-02T16:53:15Z
ethz.rosetta.versionExported
true
ethz.COinS
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