Chromosomal (routine, C-banding) and molecular (cytb) data for Sicista of the betulina group from the northern (Valdai National Park), central (the main watershed of East European Plain) and southeast (Upper Volga Basin) parts of Valdai and, for comparison, from the Moscow and Central Chernozem regions are presented and generalized. The birch mice from Valdai and the Moscow area belonging to the 32-chromosomal S. betulina, and that from the Central Chernozem area belonging to S. strandi (2n = 44) are confirmed. Birch mice were collected in various biotopes: individuals from Valdai National Park were sought for in coniferous forests with nemoral covering, other groups of S. betulina were sought for in mixed forests, and S. strandi were sought for in a forest-steppe. Priority chromosomal (C-banding) and molecular (cytb) data were obtained to indicate an originality of the S. betulina population from Valdai National Park differing in the studied genetic signs from other selections of the species from Valdai and the Moscow area and from S. strandi as well. Evolutionary and ecological aspects of the results obtained are discussed.


Baskevich M. I., Okulova N. M. Comparative karyology and craniology in birch mice of the group “betulina” (Rodentia, Dipopoidea, Sicista). Zoologicheskii zhurnal, 2003, vol. 82, no. 8, pp. 996–1009 (in Russian).
Baskevich M. I., Krysanov E. Yu., Malygin V. M., Sapel’nikov S. F. New data on the chromosomal variability in the pine vole (Microtus (Terricola) subterraneus, Rodentia, Arvicolidae) from the territory of Russia and Ukraine. Zoologicheskii zhurnal, 2007, vol. 86, no. 3, pp. 369–376 (in Russian).
Baskevich M. I., Khlyap L. A., Shvarts E. A. Chromosome Approaches in the Study of Taxonomic and Genetic Diversity of Rodents from the Valdai Upland. In: International Scientific and Practical Conference “Ecology, Evolution and Systematics of Animals”. Ryazan, “Golos Gubernii” Publ., 2012, pp. 191–193 (in Russian).
Baskevich M. I., Khlyap L. A., Schwartz E. A. Chromosomal polymorphism in the peripheral population of the root vole Mirotus oeconomus (Rodentia, Arvicolinae) of the Valdai National Park. Doklady Biological Sciences, 2014, vol. 454, no. 1, pp. 29–33.
Baskevich M. I., Potapov S. G., Mironova T. A. Caucasian cryptic species of rodents as models for studying the problem of species and speciation. Zhurnal Obshchei Biologii, 2015, vol. 76, no. 4, pp. 333–349 (in Russian).
Baskevich M. I., Khlyap L. A., Mironova T. A., Cherepanova E. V., Krivonogov D. M., Malygin V. M. To the Problem on Stability and Variability of the Root Vole (Microtus oeconomus, Rodentia, Arvicolinae), Karyotype: an Analysis of New Records from Eastern Europe. Zoologicheskii zhurnal, 2016, vol. 95, no. 4, pp. 476–483 (in Russian).
Borisov Yu. M., Kozlovsky A. I., Balakirev A. E., Demidova Т. B., Irchin S. Yu., Maligin V. M., Okulova N. M., Potapov S. G., Shchipanov A. N., Orlov V. N. Zones of Contact of the Chromosome Races of the Common Shrew Sorex araneus L. (Insectivora, Mammalia) at the Extremes of the Veps Stage of the Valdai Ice Sheet. Contemporary Problems of Ecology, 2008, vol. 1, no. 1, pp. 583–580.
Geomorfologiya i chetvertichnye otlozheniya severo-zapada SSSR (Leningradskaya, Pskovskaya i Novgorodskaya oblasti) [Geomorphology and Quaternary Deposits of the Nortwestern Part of the USSR (Leningrad, Pskov and Novgorod Regions)]. Leningrad, Nauka Publ., 1969. 256 p. (in Russian).
Kozharinov А. V. Dinamika rastitel'nosti Vostochnoi Evropy v pozdnem lednikov'e golotsene [Dynamics of the Plant cover of Eastern Europe in the Pleistocene – Holocene] : Thesis Diss. Dr. Sci. (Biol.). Moscow, 1994. 60 p. (in Russian).
Orlov V. N., Kozlovskii A. I., Balakirev A. E., Borisov YU. M. Endemic Chromosome Races of the Common Shrew Sorex araneus L. (Insectivora, Mammalia) and the Possible Preservation of Refugia in the Late Valdai Glaciation Area. Doklady Biological Sciences, 2007, vol. 416, no. 1, pp. 396–399.
Sokolov V. E., Koavalskaya Yu. M., Baskevich M. I. On species status of northern birch mice Sicista strandi Formosov (Rodentia, Dipodoidea). Zoologicheskii zhurnal, 1989, vol. 68, no. 10, pp. 95–106 (in Russian). 
Khlyap L. A., Shvarts E. A., Baskevich M. I., Nikolaev V. I., Tishkov A. A., Leonteva O. A., Cherepanova E. V., Glazov P. M. The Fauna, Ecology and Zoogeography of Mammals in Valdai Lakeland: Retrospective and Current Status. Gerald of Tver State University. Series: Biology and Ecology, 2017, no. 1, pp. 125–159 (in Russian).
Shchipanov N. A., Bulatova N. Sh., Pavlova S. V., Shchipanov A. N. The Common Shrew (Sorex araneus) as a Model Species in Ecological and Evolutionary Studies. Zoologicheskii zhurnal, 2009, vol. 88, no. 8, pp. 975–989 (in Russian). 
Evolution of European Ecosystems during Pleistocene – Holocene transition (248 kyr BP). Eds. A. K. Markova, T. van Kolfschoten. Moscow, KMK Scientific Press Ltd., 2008. 556 p. (in Russian).
Baker R. J., Bradley R. D. Speciation in mammals and the genetic species concept. J. Mammalogy, 2006, vol. 87, iss. 4, pp. 643–662. 
Bulatova N. Sh., Shchipanov N., Searle J. B. The Seliger-Moscow hybrid zone between chromosome races of common shrews – an initial description. Russ. J. Theriology, 2007, vol. 6, no. 1, pp. 111–116.
Bulatova N. Sh., Searle J. B., Bystrakova N., Nadjafova R., Shchipanov N., Orlov V. The diversity of chromosome races in Sorex araneus from European Russia. Acta Theriologica, 2000, vol. 45, suppl. 1, pp. 33–46.
Fan Z., Liu Sh., Liu Y., Zeng B., Zhang X., Guo C., Yue B. Molecular phylogeny and taxonomic reconsideration of the subfamily Zapodinae (Rodentia: Dipodidae), with an emphasis of Chinese species. Molecular Phylogenetics and Evolution, 2009, vol. 51, iss. 3, pp. 447–453.
Pucek Zd. Family Zapodidae. Handbuch der Saugetiere Europas. 2/1. Weisbaden, Academic Verlag, 1982, pp. 497–538.
Sablina O. V., Zima J., Rajabli S. I., Krystufek B., Goleniscev F. N. New data on karyotype variation in the pine vole, Pitymys subterraneus (Rodentia, Arvicolidae). Vestnik Ceskoslovenske. Spolecnosti Zoologicke (Praha), 1989, vol. 53, pp. 295–299. 
Sumner A. T. A simple technique for demonstrating centromeric heterochromatin. Experimental Cell Research, 1972, vol. 75, iss. 1, pp. 304–306.

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