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Genetic divergence within the monotypic tree genus Platycarya (Juglandaceae) and its implications for species’ past dynamics in subtropical China

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierSchool of Earth Science and Geological Engineering
dc.contributor.authorWAN, Qiu Chi
hal.structure.identifierSchool of Earth Science and Geological Engineering
dc.contributor.authorZHENG, Zhuo
hal.structure.identifierSchool of Earth Science and Geological Engineering
dc.contributor.authorHUANG, Kangyou
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGUICHOUX, Erwan
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPETIT, Remy J.
dc.date.issued2017
dc.identifier.issn1614-2942
dc.description.abstractEnSubtropical East Asia harbours a large plant diversity that is often attributed to allopatric speciation in this topographically complex region characterized by a relative climate stability. Here, we use observations of Platycarya, a widespread subtropical Asian tree genus, to explore the consequences of past climate stability on species’ evolutionary history in subtropical China. This genus has a controversial taxonomy: while it is now prevailingly treated as monotypic, two species have been originally described, Platycarya strobilacea and P. longipes. Previous information from species distribution models, fossil pollen data and genetic data based on chloroplast DNA (cpDNA) were integrated with newly obtained genetic data from the two putative species. We used both cpDNA (psbA-trnH and trnL-F intergenic spacers, including a partial trnL gene sequence) and nuclear markers. The latter included sequences of the internal transcribed spacer region (ITS1–5.8S–ITS2) of the nuclear ribosomal DNA and random genomic single nucleotide polymorphisms. Using these nuclear genetic markers, we found interspecific genetic divergence fitting with the ‘two species’ scenario and geographically structured intraspecific variation. Using cpDNA markers, we also found geographically structured intraspecific variation. Despite deep inter- and intraspecific genetic divergence, we detected genetic admixture in southwest China. Overall, our findings of genetic divergence within Platycarya support the hypothesis of allopatric speciation. However, episodes of population interconnection were identified, at least in southwest China, suggesting that the genus has had a dynamic population history.
dc.description.sponsorshipPlateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur " - ANR-10-EQPX-0016
dc.language.isoen
dc.publisherSpringer Verlag
dc.rights.urihttp://creativecommons.org/licenses/by-sa/
dc.subjectchine
dc.subjectspéciation allopatrique
dc.subjectdiversité végétale
dc.subjectzone subtropicale
dc.subject.ensubtropical China
dc.subject.ensubtropics
dc.subject.enplant diversity
dc.subject.enplatycarya
dc.subject.enlast glacial maximum
dc.subject.enallopatric speciation
dc.subject.enquaternary
dc.title.enGenetic divergence within the monotypic tree genus Platycarya (Juglandaceae) and its implications for species’ past dynamics in subtropical China
dc.typeArticle de revue
dc.identifier.doi10.1007/s11295-017-1153-9
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalTree Genetics and Genomes
bordeaux.page1-11
bordeaux.volume13
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-01607273
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01607273v1
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