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Evolutionary history of Gymnocarpos (Caryophyllaceae) in the arid regions from North Africa to Central Asia
Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China.;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China..
Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, Urumqi 830011, Peoples R China.;Chinese Acad Sci, Inst Bot, Beijing 100093, Peoples R China..
Free Univ Berlin, Bot Garten, Konigin Luise Str 6-8, D-14195 Berlin, Germany.;Free Univ Berlin, Bot Museum Berlin Dahlem, Konigin Luise Str 6-8, D-14195 Berlin, Germany..
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Organismal Biology, Systematic Biology.
2016 (English)In: Biological Journal of the Linnean Society, ISSN 0024-4066, E-ISSN 1095-8312, Vol. 119, no 2, 511-522 p.Article in journal (Refereed) Published
Abstract [en]

Gymnocarpos has only about ten species distributed in the arid regions of Asia and Africa, but it exhibits a geographical disjunction between eastern Central Asia and western North Africa and Minor Asia. We sampled eight species of the genus and sequenced two chloroplast regions (rps16 and psbB-psbH), and the nuclear rDNA (ITS) to study the phylogeny and biogeography. The results of the phylogenetic analyses corroborated that Gymnocarpos is monophyletic, in the phylogenetic tree two well supported clades are recognized: clade 1 includes Gymnocarpos sclerocephalus and G. decandrus, mainly the North African group, whereas clade 2 comprises the remaining species, mainly in the Southern Arabian Peninsula. Molecular dating analysis revealed that the divergence age of Gymnocarpos was c. 31.33 Mya near the Eocene and Oligocene transition boundary, the initial diversification within Gymnocarpos dated to c. 6.69 Mya in the late Miocene, and the intraspecific diversification mostly occurred during the Quaternary climate oscillations. Ancestral area reconstruction suggested that the Southern Arabian Peninsula was the ancestral area for Gymnocarpos. Our conclusions revealed that the aridification since mid-late Miocene significantly affected the diversification of the genus in these areas.

Place, publisher, year, edition, pages
2016. Vol. 119, no 2, 511-522 p.
Keyword [en]
ancestral area, diversification, historical biogeography
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-308924DOI: 10.1111/bij.12834ISI: 000386919000021OAI: oai:DiVA.org:uu-308924DiVA: diva2:1051163
Available from: 2016-12-01 Created: 2016-12-01 Last updated: 2016-12-01Bibliographically approved

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