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1-20 of 25
Keywords: rDNA
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Journal Articles
Subject Area:
Genetics
Diego Madruga Saraiva, Marcelo Santos de Souza, Victoria Tura, Vitor Oliveira de Rosso, Edison Zefa, Analía del Valle Garnero, Ricardo José Gunski, Francisco de Menezes Cavalcante Sassi, Marcelo de Bello Cioffi, Rafael Kretschmer
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2024) 164 (1): 43–51.
Published Online: 28 March 2024
... and to obtain chromosomal preparations using the standard methodology. The chromosomal distribution of constitutive heterochromatin was investigated by C-banding, while the location of simple repetitive sequences (SSRs), 18S rDNA, and telomeric sequences was found through fluorescence in situ hybridization...
Journal Articles
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2023) 163 (5-6): 327–333.
Published Online: 13 November 2023
... diameter of NORs of triploid was no significant different from that of diploid ( p > 0.05). Additionally, 5S rDNA localization to 3 submetacentric chromosomes was observed in triploids, compared to 2 submetacentric chromosomes in diploids. The number of 18S rDNA sites displayed positional conservancy...
Journal Articles
Subject Area:
Genetics
Fábio Hiroshi Takagui, Lucas Baumgärtner, Patrik Viana, Moema C.C. Lima, Jamille de A. Bitencourt, Paulo Cesar Venere, Roberto Laridondo Lui, Orlando Moreira-Filho, Eliana Feldberg, Fernanda Almeida Simões, José Luis Birindelli, Lucia Giuliano-Caetano
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2022) 162 (1-2): 64–75.
Published Online: 30 June 2022
... rDNA sites on submetacentric pair 15. A. grypus has the most divergent chromosomal characteristics because, even though it also has 2n = 56 chromosomes, it exhibits several differences in the chromosome formula, heterochromatin distribution, and number/position of the rDNA sites. In sum, we believe...
Journal Articles
Subject Area:
Genetics
Luana Pereira dos Santos, Carine M. Francisco, Edimar O. Campos Júnior, Jonathan P. Castro, Ricardo Utsunomia, Sandra Morelli, Fábio Porto-Foresti, Fausto Foresti, Roberto F. Artoni
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2021) 161 (5): 249–256.
Published Online: 25 August 2021
... to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Tetra fish B chromosome Chromosome painting rDNA Heterochromatin B chromosomes are parasitic and dispensable supernumerary elements in the genome, occurring...
Journal Articles
Subject Area:
Genetics
Caroline R.D. Machado, Larissa Glugoski, Camila Domit, Marcela B. Pucci, Daphne W. Goldberg, Layse A. Marinho, Gideão W.W.F. da Costa, Viviane Nogaroto, Marcelo R. Vicari
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2020) 160 (9): 531–538.
Published Online: 29 October 2020
... Microstructural variation rDNA Sea turtles represent a primitive and unique component of biological diversity as members of the oldest living reptile lineage (Reptilia, Anapsida, Testudines, Cryptodira) and are an important part of marine ecosystems [Rees et al., 2016]. Currently, 7 species of sea...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2020) 160 (4): 214–223.
Published Online: 06 May 2020
... and 5S rDNA clusters in 1 pair of autosomes, syntenic and colocalizing in the 3 analyzed species. However, in A. areata , heteromorphism between the cistrons was observed. The telomeric (TTAGG) n probe showed signals in all 3 species, with proximal signals in the X and dispersed signals in the y...
Journal Articles
Subject Area:
Genetics
Geovana C. Malimpensa, Josiane B. Traldi, Danyelle Toyama, Flávio Henrique-Silva, Marcelo R. Vicari, Orlando Moreira-Filho
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2018) 154 (2): 99–106.
Published Online: 11 April 2018
... exhibited 2n = 56 chromosomes, with intra- and interindividual variation in the number of heterochromatic B chromosomes (from 0 to 4). The 5S rDNA was localized in pairs 1 and 5, and histone probes (H1, H3, and H4) and U2 small nuclear RNA were syntenic with 5S rDNA in pair 5. Histone sequences were also...
Journal Articles
Subject Area:
Genetics
Amanda A. Soares, Jonathan P. Castro, Pedro Balieiro, Sidnei Dornelles, Tiago M. Degrandi, Ives J. Sbalqueiro, Roberto Ferreira Artoni, Iris Hass
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2018) 154 (2): 79–85.
Published Online: 16 March 2018
... of these elements. We analyzed morphology, frequency, and possible homologies amongst different B chromosomes found in an isolated Akodon montensis population in southern Brazil. Repetitive sequences (18S, 5S rDNA and telomeric sequences) were used to test for their accumulation on the supernumerary chromosomes...
Journal Articles
Subject Area:
Genetics
Valentina G. Kuznetsova, Anna Maryańska-Nadachowska, Nazar A. Shapoval, Boris A. Anokhin, Anatoly P. Shapoval
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2017) 153 (3): 147–157.
Published Online: 17 January 2018
...Valentina G. Kuznetsova; Anna Maryańska-Nadachowska; Nazar A. Shapoval; Boris A. Anokhin; Anatoly P. Shapoval We studied the karyotypes of 8 dragonfly species originating from the Curonian Spit (the Baltic Sea, Russia) using C-banding and FISH with 18S rDNA and “insect” telomeric (TTAGG) n probes...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2017) 153 (3): 158–164.
Published Online: 21 December 2017
... libraries, which permitted simultaneous identification of all chromosomes of F. vesca . Moreover, 45S and 5S rDNA were mapped to chromosomes 1, 2, and 7, respectively. A karyotype of metaphase chromosomes was constructed, representing the first FISH-based molecular cytogenetic karyotype of F. vesca . Our...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2016) 150 (2): 150–155.
Published Online: 22 December 2016
...Kunpeng Li; Huaisong Wang; Jiming Wang; Jianying Sun; Zongyun Li; Yonghua Han The 5S and 45S rDNA sites are useful chromosome landmarks and can provide valuable information about karyotype evolution and species interrelationships. In this study, we employed fluorescence in situ hybridization (FISH...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2015) 146 (2): 144–152.
Published Online: 02 September 2015
... performed using traditional cytogenetic techniques to investigate karyotypes and chromosomal locations of 18S and 5S rDNA genes. However, only a few studies are currently available about other repetitive sequences. Here, the chromosomal location of small nuclear RNA genes, identified as U1 and U2 snRNA...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2014) 143 (4): 268–274.
Published Online: 16 August 2014
...-mitotically active somatic body parts from both sexes in addition to ovarioles and testes by PCR analysis of 2 B-specific molecular markers. We also elucidated the number of B chromosomes that an individual carried through quantifying the B-located rDNA copy number by qPCR. Our results indicated...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2014) 143 (1-3): 104–113.
Published Online: 25 March 2014
...Lucie Crhak Khaitova; Gun Werlemark; Alena Kovarikova; Hilde Nybom; Ales Kovarik All dogroses (Rosa sect. Caninae) are characterized by the peculiar canina meiosis in which genetic material is unevenly distributed between female and male gametes. The pan- canina rDNA family (termed beta) appears...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2013) 141 (4): 309–316.
Published Online: 21 September 2013
..., TTAGGG n sequence and non-LTR retrotransposon family members Rex1, Rex3 and Rex6 showed that non-LTR elements may be dispersed in the chromosome set with relative concentration in heterochromatic regions, as shown by Rex1 , or may even intercalate in 45S rDNA and the telomeric sequence, as found for Rex3...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2013) 139 (2): 119–127.
Published Online: 01 November 2012
...-temperature effects on subtelomeric repetitive sequences (pSc200) and 45S rDNA in rye seedlings submitted to 40°C during 4 h. Chromatin organization patterns were evaluated through fluorescent in situ hybridization and transcription levels were assessed using quantitative real-time PCR. Additionally...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2012) 138 (1): 36–45.
Published Online: 22 August 2012
...I.E. Jetybayev; A.G. Bugrov; T.V. Karamysheva; J.P.M. Camacho; N.B. Rubtsov Chromosome location of ribosomal DNA (rDNA) and telomeric repeats was analysed in mitotic chromosomes of 15 species of Gomphocerinae grasshoppers belonging to the tribes Arcypterini, Gomphocerini, Stenobothrini...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2011) 134 (3): 234–242.
Published Online: 29 June 2011
... authors. Interestingly, many of the distal chromosome segments in T. virginiana possess duplicated subterminal telomere clusters, heterochromatin, 5S and 45S rDNAs orderly intermixed and share this complex cytomolecular architecture with the common type of a B chromosome. Based on the obtained results...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2011) 134 (3): 229–233.
Published Online: 28 May 2011
... to the β-complex of the ring-forming rhoeos. In spite of some modifications in the arrangement of a few distal rDNA sites and in the amount of pericentromeric AT-rich heterochromatin, the alethal genome of the bivalent-forming Rhoeo seems segmentally unaltered. Thus, the breakdown of balanced lethals...
Journal Articles
Subject Area:
Genetics
Journal:
Cytogenetic and Genome Research
Cytogenet Genome Res (2011) 134 (3): 220–228.
Published Online: 03 May 2011
... shape, a process that is likely to be influenced by the pulling forces of microtubules along the holocentric axis towards the corresponding microtubule organizing regions. A single pair of 45S rDNA sites, situated distal to Arabidopsis -telomere repeats, was observed at the terminal region of one...
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