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Balancing a Cline by Influx of Migrants: A Genetic Transition in Water Frogs of Eastern Greece

Hotz, Hansjürg ; Beerli, Peter ; Uzzell, Thomas ; Guex, Gaston-Denis ; Pruvost, Nicolas B. M. ; Schreiber, Robert ; Plötner, Jörg

In: Journal Of Heredity, 2013, vol. 104, no. 1, p. 57-71

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    Title
    • Balancing a Cline by Influx of Migrants: A Genetic Transition in Water Frogs of Eastern Greece
    Author
    • Hotz, Hansjürg. Institut für Evolutionsbiologie und Umweltwissenschaften, Universität Zürich-Irchel, Winterthurerstrasse 190, 8057 Zurich, Switzerland
    • Beerli, Peter. Department of Scientific Computing, Florida State University, Tallahassee, FL 32306-4120
    • Uzzell, Thomas. Laboratory for Molecular Systematics and Ecology, Academy of Natural Sciences, 1900 B. F. Parkway, Philadelphia, PA 19103, USA
    • Guex, Gaston-Denis. Institut für Evolutionsbiologie und Umweltwissenschaften, Universität Zürich-Irchel, Winterthurerstrasse 190, 8057 Zurich, Switzerland
    • Pruvost, Nicolas B. M.. Institut für Evolutionsbiologie und Umweltwissenschaften, Universität Zürich-Irchel, Winterthurerstrasse 190, 8057 Zurich, Switzerland
    • Schreiber, Robert. Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung an der Humboldt-Universität zu Berlin, Invalidenstraße 43, 10115 Berlin, Germany
    • Plötner, Jörg. Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung an der Humboldt-Universität zu Berlin, Invalidenstraße 43, 10115 Berlin, Germany
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Journal Of Heredity, 2013, vol. 104, no. 1, p. 57-71. Oxford University Press
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:291030
    Summary
    Variation patterns of allozymes and of ND3 haplotypes of mitochondrial DNA reveal a zone of genetic transition among western Palearctic water frogs extending across northeastern Greece and European Turkey. At the western end of the zone, allozymes characteristic of Central European frogs known as Pelophylax ridibundus predominate, whereas at the eastern end, alleles characteristic of western Anatolian water frogs (P. cf. bedriagae) prevail. The ND3 haplotypes reveal 2 major clades, 1 characteristic of Anatolian frogs, the other of European; the European clade itself has distinct eastern and western subclades. Both the 2 major clades and the 2 subclades overlap within the transition zone. Using Bayesian model selection methods, allozyme data suggest considerable immigration into the Nestos River area from eastern and western populations. In contrast, the ND3 data suggest that migration rates are so high among all locations that they form a single panmictic unit; the best model for allozymes is second best for mitochondrial DNA (mtDNA). Nuclear markers (allozymes), which have roughly 4 times as deep a coalescent history as mtDNA data and thus may reflect patterns over a longer time, indicate that eastern and western refugial populations have expanded since deglaciation (in the last 10 000 years) and have met near the Nestos River, whereas the mtDNA with its smaller effective population size has already lost the signal of partitioning into refugia