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Ilya S. Darevsky - One of the best experts on this subject based on the ideXlab platform.
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a new lizard species from Lacerta saxicola group Lacerta dryada sp nov sauria lacertidae and some comments relative to Lacerta clarkorum darevsky et vedmederja 1977
Russian Journal of Herpetology, 2011Co-Authors: Ilya S. Darevsky, Boris TuniyevAbstract:The re-examination of Lacerta clarkorum Darevsky et Vedmederja, 1977 type series as well as analysis of the recently collected new material may suggest that within the frames of Northeastern Turkey and neighboring region of Adzharistan within the Georgia, live two close allopatric species: Lacerta clarkorum proper and a new species Lacerta dryada sp. nov., whose description is made in this article. Evidence is provided on the distribution and comparative ecology of both species, their possible phylogenetic relation being discussed.
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A New Lizard Species from Lacerta saxicola Group — Lacerta dryada sp. nov. (Sauria, Lacertidae) and Some Comments Relative to Lacerta clarkorum Darevsky et Vedmederja, 1977
Russian Journal of Herpetology, 2011Co-Authors: Ilya S. Darevsky, Boris TuniyevAbstract:The re-examination of Lacerta clarkorum Darevsky et Vedmederja, 1977 type series as well as analysis of the recently collected new material may suggest that within the frames of Northeastern Turkey and neighboring region of Adzharistan within the Georgia, live two close allopatric species: Lacerta clarkorum proper and a new species Lacerta dryada sp. nov., whose description is made in this article. Evidence is provided on the distribution and comparative ecology of both species, their possible phylogenetic relation being discussed.
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Allozyme Variation and Population Substructuring in the Caucasian Ground Lizards Lacerta derjugini and Lacerta praticola
Russian Journal of Herpetology, 2011Co-Authors: Ross D. Macculloch, Ilya S. Darevsky, Robert W MurphyAbstract:Genetic diversity at 35 allozyme loci was surveyed in Lacerta derjugini (3 populations) and L. praticola (2 populations). Indices of variability were consistent with those found in other Caucasian Lacerta . There was little genetic substructuring between two populations of L. praticola despite considerable geographic separation. Conversely, populations of L. derjugini in close proximity to one another exhibited considerable substructuring.
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New satellite DNA in Lacerta s. str. lizards (Sauria: Lacertidae): evolutionary pathways and phylogenetic impact.
Journal of experimental zoology. Part B Molecular and developmental evolution, 2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia – the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62–74% identical. The latter is a satellite DNA family typical for Darevskia (syn. “L. saxicola complex”) (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172–183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.) 000:1–12, 2004. © 2004 Wiley-Liss, Inc.
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New Satellite DNA in Lacerta s. str. Lizards (Sauria: Lacertidae): Evolutionary Pathways and
2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia - the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62-74% identical. The latter is a satellite DNA family typical for Darevskia (syn. ''L. saxicola complex'') (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172-183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.)
Dmitri A. Kramerov - One of the best experts on this subject based on the ideXlab platform.
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New satellite DNA in Lacerta s. str. lizards (Sauria: Lacertidae): evolutionary pathways and phylogenetic impact.
Journal of experimental zoology. Part B Molecular and developmental evolution, 2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia – the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62–74% identical. The latter is a satellite DNA family typical for Darevskia (syn. “L. saxicola complex”) (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172–183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.) 000:1–12, 2004. © 2004 Wiley-Liss, Inc.
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New Satellite DNA in Lacerta s. str. Lizards (Sauria: Lacertidae): Evolutionary Pathways and
2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia - the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62-74% identical. The latter is a satellite DNA family typical for Darevskia (syn. ''L. saxicola complex'') (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172-183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.)
Ettore Olmo - One of the best experts on this subject based on the ideXlab platform.
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Characterization of a satellite DNA in the genera Lacerta and Timon (Reptilia, Lacertidae) and its role in the differentiation of the W chromosome.
Journal of experimental zoology. Part B Molecular and developmental evolution, 2018Co-Authors: Massimo Giovannotti, Ettore Olmo, Paola Nisi Cerioni, Verónica Rojo, Tahar Slimani, Andrea Splendiani, Vincenzo Caputo BarucchiAbstract:In this study, IMO-TaqI satDNA, previously isolated in several species of Lacertidae, was isolated and characterized from four species of the genus Lacerta and three of the genus Timon. The aim was to gain further insights into the evolutionary dynamics of this satDNA, its occurrence among lacertids and to understand if it plays any role in sex chromosome evolution in these seven species. The results here obtained highlighted the presence of this repetitive element in the genome of all the species investigated, thus indicating that IMO-TaqI satDNA is evolutionary conserved among a wide variety of lacertids. In addition, this element was found to be very abundant in the constitutive heterochromatin of the W-sex chromosome of the four Lacerta species investigated. The occurrence of IMO-TaqI satDNA on Lacerta heterochromosome suggests that it is involved in the differentiation of the W chromosome by heterochromatinization, and the fact that it is absent in the W of other lacertids investigated seems to confirm that repetitive DNA sequences would remain randomly trapped into the sex chromosomes, undergoing amplification as a consequence of the suppression of recombination.
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karyological and genetic variation in middle eastern lacertid lizards Lacerta laevis and the Lacerta kulzeri complex a case of chromosomal allopatric speciation
Chromosome Research, 2003Co-Authors: Herman In Den A J Bosch, Gaetano Odierna, Teresa Capriglione, Gennaro Aprea, Marco Barucca, Adriana Canapa, Ettore OlmoAbstract:Karyological (standard and C, Ag-NOR and Alu-I banding methods) and mtDNA analyses (cytochrome b and 12S rRNA) were conducted on specimens from eight allopatric populations of the Lacerta kulzeri complex. Parallel analyses were performed for comparison on Lacerta laevis specimens. Karyological and molecular studies support the morphological and ethological evidence indicating the specific separation between Lacerta laevis and Lacerta kulzeri In the Lacerta kulzeri complex, chromosomal analysis substantiated an interpopulation differentiation roughly along a north–south trend, mainly regarding the sex chromosome morphology and heterochromatin.The cytochrome b and 12S rRNA gene analyses showed minor genetic differences that were considerably smaller than those commonly found in genetically isolated populations. The L. kulzeri populations from Barouk, Druze and Hermon show a mean genetic distance that, in other saurians, characterises subspecies. The conditions found in L. laevis and L. kulzeri are reminiscent of King's model of chromosomal primary allopatry and support the hypothesis that in these lacertid lizards chromosome variations can become fixed before the accumulation of the genetic mutations.
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Mechanisms of differentiation in the sex chromosomes of some Lacertidae
Amphibia-Reptilia, 1994Co-Authors: Gaetano Odierna, Larissa A. Kupriyanova, Teresa Capriglione, Ettore OlmoAbstract:Cytological and molecular evidence is provided to characterize the sex chromosomes of several species of Lacertidae. Observations on pachytene and lampbrush stages show that sex chromosomes have different condensation cycles and are only partially paired during meiosis. Bkm probe hybridization to Pst I-treated genomic DNA of Podarcis sicula and Lacerta vivipara shows the same pattern both in males and females. In situ hybridization of the same probe to Lacerta vivipara chromosomes shows no preferential localization of this DNA sequence. The results obtained clearly exclude the possible involvement of Bkm in sex-chromosome differentiation in the species investigated.
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Further data on sex chromosomes of Lacertidae and a hypothesis on their evolutionary trend
Amphibia-Reptilia, 1993Co-Authors: Gaetano Odierna, Larissa A. Kupriyanova, T. Caprigilone, Ettore OlmoAbstract:Sex chromosomes were studied in eight species of lacertid lizards using C-banding, G-banding and restriction enzyme treatment. All of the species showed female heterogamety. The W chromosome was a microchromosome in Lacerta graeca and Ophisops elegans. Two types of W were found in Lacerta vivipara; in specimens from The Netherlands it was metacentric, whereas in specimens from Russia it was acrocentric or subtelocentric. The W chromosome was homomorphic or nearly homomorphic but completely C-banded and heterochromatic in Lacerta agilis, Podarcis hispanica, Algyroides moreoticus and A. nigropunctatus. In was only possible to find sex chromosomes using the G-banding method in Podarcis sicula. The results obtained, together with data in the literature, suggest that sex chromosomes are likely to be present in all Lacertidae and that their differentiation took place repeatedly and independently in different taxa within the family. A model for sex chromosome evolution in the family, in which the starting point was the heterochromatization of the W chromosome, is proposed.
D. G. Ciobanu - One of the best experts on this subject based on the ideXlab platform.
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New satellite DNA in Lacerta s. str. lizards (Sauria: Lacertidae): evolutionary pathways and phylogenetic impact.
Journal of experimental zoology. Part B Molecular and developmental evolution, 2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia – the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62–74% identical. The latter is a satellite DNA family typical for Darevskia (syn. “L. saxicola complex”) (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172–183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.) 000:1–12, 2004. © 2004 Wiley-Liss, Inc.
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New Satellite DNA in Lacerta s. str. Lizards (Sauria: Lacertidae): Evolutionary Pathways and
2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia - the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62-74% identical. The latter is a satellite DNA family typical for Darevskia (syn. ''L. saxicola complex'') (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172-183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.)
Vernata V Grechko - One of the best experts on this subject based on the ideXlab platform.
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New satellite DNA in Lacerta s. str. lizards (Sauria: Lacertidae): evolutionary pathways and phylogenetic impact.
Journal of experimental zoology. Part B Molecular and developmental evolution, 2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia – the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62–74% identical. The latter is a satellite DNA family typical for Darevskia (syn. “L. saxicola complex”) (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172–183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.) 000:1–12, 2004. © 2004 Wiley-Liss, Inc.
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New Satellite DNA in Lacerta s. str. Lizards (Sauria: Lacertidae): Evolutionary Pathways and
2004Co-Authors: D. G. Ciobanu, Ilya S. Darevsky, Vernata V Grechko, Dmitri A. KramerovAbstract:A new tandemly repeated (satellite) DNA family namely Agi160, from Lacerta agilis and Lacerta strigata (Lacerta sensu stricto (s. str.), Linnaeus 1758) have been cloned and sequenced. Agi160 is found in the above two species, as well as two other representatives of the same genus, L. viridis and L. media. DNA hybridization did not reveal it in Darevskia, Podarcis, Zootoca, Eremias, Ophisops, and Gallotia - the other genera of the family Lacertidae. The results suggest that Agi160 is a Lacerta s. str. specific family of tandem DNA repeats. However, a comparison between sequences of Agi160 and CLsat repeat units revealed 60 bp regions 62-74% identical. The latter is a satellite DNA family typical for Darevskia (syn. ''L. saxicola complex'') (Grechko et al., Molecular-genetic classification and phylogenetic relatedness of some species of Lacertidae lizards by taxonoprint data. Mol Biol 32:172-183, 1988.). Both Agi160 and CLsat tandem repeats share several common features (e.g., the same AT content and distribution of multiple short A-T runs, internal structure of repeated units, the presence of conservative regions). These data are indicative of their common origin and a possibly strong selective pressure upon conserving both satellites. A comparative analysis of structure, organization, and abundance of these two families of satDNA reveals evolutionary pathways that led to their formation and divergence. The data are consistent with the hypotheses of the concerted evolution of satellite DNA families. The possibility of use of Agi160 as a phylogenetic tool, defining relationships within Lacerta s. str., as well as within the whole family of Lacertidae is discussed. J. Exp. Zool. (Mol. Dev. Evol.)
