Comparative cytogenetics of hamsters of the genus &lt;i&gt;Calomyscus&lt;/i&gt;

Graphodatsky, Alexander S.; Sablina, O. V.; Meyer, Marlies; Malikov, Vladimir; Isakova, Ef.; Трифонов, Владимир; Polyakov, A. V.; Lushnikova, Tamara; Vorobieva, Nadezhda V.; Serdyukova, Natalia A.; Perelman, Polina L.; Бородин, П. М.; Benda, Pavel; Frynta, Daniel; Leikepová, L.; Munclinger, Pavel; Piálek, Jaroslav; Sádlová, Jovana; Zima, Jan

doi:10.1159/000015513

Cited by 45 publications

(48 citation statements)

References 19 publications

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“…Mouse-like hamsters of the genus Calomyscus represent a striking example of speciation underscored by cytogenetic characters-morphologically similar species of mouse-like hamsters have different diploid and fundamental numbers, and specific sets of translocations (Graphodatsky et al, 2000). Current cytogentic data confirm conclusions based on molecular studies that show Calomyscus to be the most basal clade within Muroidea (Jansa and Weksler, 2004;Romanenko et al, 2007b).…”

Section: Calomyscidaesupporting

confidence: 56%

Chromosomal evolution in Rodentia

et al. 2011

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Rodentia is the most species-rich mammalian order and includes several important laboratory model species. The amount of new information on karyotypic and phylogenetic relations within and among rodent taxa is rapidly increasing, but a synthesis of these data is currently lacking. Here, we have integrated information drawn from conventional banding studies, recent comparative painting investigations and molecular phylogenetic reconstructions of different rodent taxa. This permitted a revision of several ancestral karyotypic reconstructions, and a more accurate depiction of rodent chromosomal evolution.

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Section: Calomyscidaesupporting

confidence: 56%

Chromosomal evolution in Rodentia

et al. 2011

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“…It is well known that heterochromatin is underrepresented in the SC (Stack 1984). Studies on mammals show that short heterochromatic arms present at some chromosomes may not be visualized at SCs (Graphodatsky et al 2000). On the other hand, immunolocalization of centromere proteins reveals centromere position more reliably than primary constrictions at metaphase spreads.…”

Section: Discussionmentioning

confidence: 99%

Karyotypes and recombination patterns of the Common Swift (Apus apus Linnaeus, 1758) and Eurasian Hobby (Falco subbuteo Linnaeus, 1758)

Malinovskaya

Shnaider²,

Borodin

et al. 2018

Avian Res

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Background: Meiotic recombination is an important source of genetic variability. Studies on mammals demonstrate a substantial interspecies variation in overall recombination rate, which is dependent mainly on chromosome (2n) and chromosome arm number (FN). Bird karyotypes are very conservative with 2n being about 78-82 and FN being 80-90 in most species. However, some families such as Apodidae (swifts) and Falconidae (falcons) show a substantial karyotypic variation. In this study, we describe the somatic and pachytene karyotypes of the male Common Swift (Apus apus) and the pachytene karyotype of the male Eurasian Hobby (Falco subbuteo) and estimate the overall number and distribution of recombination events along the chromosomes of these species. Methods:The somatic karyotype was examined in bone marrow cells. Pachytene chromosome spreads were prepared from spermatocytes of adult males. Synaptonemal complexes and mature recombination nodules were visualized with antibodies to SYCP3 and MLH1 proteins correspondingly. Results:The karyotype of the Common Swift consists of three metacentric, three submetacentric and two telocentric macrochromosomes and 31 telocentric microchromosomes (2n = 78; FN = 90). It differs from the karyotypes of related Apodidae species described previously. The karyotype of the Eurasian Hobby contains one metacentric and 13 telocentric macrochromosomes and one metacentric and ten telocentric microchromosomes (2n = 50; FN = 54) and is similar to that described previously in 2n, but differs for macrochromosome morphology. Despite an about 40% difference in 2n and FN, these species have almost the same number of recombination nodules per genome: 51.4 ± 4.3 in the swift and 51.1 ± 6.7 in the hobby. The distribution of the recombination nodules along the macrochromosomes was extremely polarized in the Common Swift and was rather even in the Eurasian Hobby. Conclusions:This study adds two more species to the short list of birds in which the number and distribution of recombination nodules have been examined. Our data confirm that recombination rate in birds is substantially higher than that in mammals, but shows rather a low interspecies variability. Even a substantial reduction in chromosome number does not lead to any substantial decrease in recombination rate. More data from different taxa are required to draw statistically supported conclusions about the evolution of recombination in birds.

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“…Chromosome painting was performed as previously described [Yang et al, 1999;Graphodatsky et al, 2000;Yang and Graphodatsky, 2009]. Images were captured and processed using Videotest 2.0 Image Analysis System and a Baumer Optronics CCD Camera mounted on an Olympus BX53 microscope (Olympus).…”

Section: Methodsmentioning

confidence: 99%

Comparative Chromosome Map and Heterochromatin Features of the Gray Whale Karyotype (Cetacea)

Kulemzina

Proskuryakova

Beklemisheva

et al. 2016

Cytogenet Genome Res

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Cetacean karyotypes possess exceptionally stable diploid numbers and highly conserved chromosomes. To date, only toothed whales (Odontoceti) have been analyzed by comparative chromosome painting. Here, we studied the karyotype of a representative of baleen whales, the gray whale (Eschrichtius robustus, Mysticeti), by Zoo-FISH with dromedary camel and human chromosome-specific probes. We confirmed a high degree of karyotype conservation and found an identical order of syntenic segments in both branches of cetaceans. Yet, whale chromosomes harbor variable heterochromatic regions constituting up to a third of the genome due to the presence of several types of repeats. To investigate the cause of this variability, several classes of repeated DNA sequences were mapped onto chromosomes of whale species from both Mysticeti and Odontoceti. We uncovered extensive intrapopulation variability in the size of heterochromatic blocks present in homologous chromosomes among 3 individuals of the gray whale by 2-step differential chromosome staining. We show that some of the heteromorphisms observed in the gray whale karyotype are due to distinct amplification of a complex of common cetacean repeat and heavy satellite repeat on homologous autosomes. Furthermore, we demonstrate localization of the telomeric repeat in the heterochromatin of both gray and pilot whale (Globicephala melas, Odontoceti). Heterochromatic blocks in the pilot whale represent a composite of telomeric and common repeats, while heavy satellite repeat is lacking in the toothed whale consistent with previous studies.

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Comparative cytogenetics of hamsters of the genus <i>Calomyscus</i>

Cited by 45 publications

References 19 publications

Chromosomal evolution in Rodentia

Chromosomal evolution in Rodentia

Karyotypes and recombination patterns of the Common Swift (Apus apus Linnaeus, 1758) and Eurasian Hobby (Falco subbuteo Linnaeus, 1758)

Comparative Chromosome Map and Heterochromatin Features of the Gray Whale Karyotype (Cetacea)

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