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Öğe Evolutionary history of mole rats (genus Nannospalax) inferred from mitochondrial cytochrome b sequence(OXFORD UNIV PRESS, 2012) Krystufek, Boris; Ivanitskaya, Elena; Arslan, Atilla; Arslan, Emine; Buzan, Elena V.Mole rats (genus Nannospalax) display prolific chromosomal variation with more than 50 distinct cytotypes. These cytotypes are largely indistinguishable morphologically, are mainly allopatric and their taxonomic ranking is contradictory. We established a cytochrome b phylogeny for 15 cytotypes belonging to all three species recognized on morphological grounds (morphospecies): N. leucodon, N. xanthodon and N. ehrenbergi. Phylogenetic reconstructions yielded two highly divergent groups which are in agreement with the current division into two subgenera (Nannospalax and Mesospalax). The former comprised samples from south-eastern Turkey, Israel and Egypt (the morphospecies N. ehrenbergi). Basal dichotomy within Mesospalax remained unresolved and the putative sister position of N. leucodon against the two lineages of N. xanthodon was not supported in our analysis. Net divergences between sister cytotypes were low (< 2.0%) and two N. leucodon cytotypes were not even reciprocally monophyletic. Among the three morphospecies, the genetic diversity was lowest in N. leucodon (2.4% +/- 0.3%), highest in N. xanthodon (8.8% +/- 0.7%) and intermediate in N. ehrenbergi (5.0% +/- 0.5%). Our results show that associations between genetic and chromosomal variation are not widespread and common in mole rats, and therefore refute the generalization of a cytotype-equals-species approach. (C) 2011 The Linnean Society of London, Biological Journal of the Linnean Society, 2012, 105, 446455.Öğe Mitochondrial Divergence Between Three Cytotypes of the Anatolian Mole Rat, Nannospalax Xanthodon (Nordmann, 1840)(TAYLOR & FRANCIS LTD, 2010) Arslan, Emine; Gülbahçe, Elif; Arıkoğlu, Hilal; Arslan, Atilla; Buzan, Elena V.; Krystufek, BorisThe Blind Mole Rats of Anatolia (Nannospalax xanthodon (Nordmann, 1840)) are characterised by prolific chromosomal diversification. While the geographic distribution of various cytotypes is well documented, opinions on their taxonomic ranking varies amongst authorities. A partial sequence (630 bp) of mitochondria] cytochrome b gene in 13 Blind Mole Rats from the Konya basin, central Anatolia, which represented three distinct cytotypes (2n = 40, 58, and 60) yielded nine cyt b haplotypes. Phylogenetic reconstructions recognized three well supported lineages which matched diploid number counts. Genetic divergences between cytotypes were high (K2P between 8.16% +/- 1.19 and 11.33% +/- 1.42) and application of the 2% divergence rate to the net divergence estimates suggests their divergence about 3.84 and 5.43 Mya (95% confidence interval = 1.53-8.19 Mya). If one would rely on genetic operational criteria in species delimitation, there would be little doubt that the three Nannospalax cytotypes analysed in this study belong to distinct allopatric species. Before translating the results into formal taxonomy, more genetic information should be acquired on different Nannospalax cytotypes occupying the eastern Mediterranean.