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Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes

Trinomys Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental...

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Autores principales: Araújo, Naiara Pereira, Dias, Cayo Augusto Rocha, Stumpp, Rodolfo, Svartman, Marta
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6074804/
https://www.ncbi.nlm.nih.gov/pubmed/30083457
http://dx.doi.org/10.7717/peerj.5316
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author Araújo, Naiara Pereira
Dias, Cayo Augusto Rocha
Stumpp, Rodolfo
Svartman, Marta
author_facet Araújo, Naiara Pereira
Dias, Cayo Augusto Rocha
Stumpp, Rodolfo
Svartman, Marta
author_sort Araújo, Naiara Pereira
collection PubMed
description Trinomys Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers. We analyzed the chromosomes of two Trinomys species: Trinomys moojeni (2n = 56, FN = 106) and Trinomys setosus setosus (2n = 56, FN = 106 and 2n = 56, FN = 108). Our analyses included GTG- and CBG-banding, silver-staining of the nucleolar organizer regions, and chromosome mapping of telomeres and 45S rDNA by fluorescent in situ hybridization (FISH). Comparative GTG- and CBG-banding suggested that the interspecific variation may be due to rearrangements such as pericentric inversions, centromere repositioning, and heterochromatin variation. We report two new karyotypes for T. s. setosus and describe for the first time the banding patterns of the two Trinomys species.
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spelling pubmed-60748042018-08-06 Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes Araújo, Naiara Pereira Dias, Cayo Augusto Rocha Stumpp, Rodolfo Svartman, Marta PeerJ Genetics Trinomys Thomas (1921) is a terrestrial genus of spiny rats endemic to the Brazilian areas of Atlantic Forest and the transitional areas of Cerrado and Caatinga. Although most species have been already karyotyped, the available cytogenetic information is mostly restricted to diploid and fundamental numbers. We analyzed the chromosomes of two Trinomys species: Trinomys moojeni (2n = 56, FN = 106) and Trinomys setosus setosus (2n = 56, FN = 106 and 2n = 56, FN = 108). Our analyses included GTG- and CBG-banding, silver-staining of the nucleolar organizer regions, and chromosome mapping of telomeres and 45S rDNA by fluorescent in situ hybridization (FISH). Comparative GTG- and CBG-banding suggested that the interspecific variation may be due to rearrangements such as pericentric inversions, centromere repositioning, and heterochromatin variation. We report two new karyotypes for T. s. setosus and describe for the first time the banding patterns of the two Trinomys species. PeerJ Inc. 2018-07-31 /pmc/articles/PMC6074804/ /pubmed/30083457 http://dx.doi.org/10.7717/peerj.5316 Text en ©2018 Araújo et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Genetics
Araújo, Naiara Pereira
Dias, Cayo Augusto Rocha
Stumpp, Rodolfo
Svartman, Marta
Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes
title Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes
title_full Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes
title_fullStr Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes
title_full_unstemmed Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes
title_short Cytogenetic analyses in Trinomys (Echimyidae, Rodentia), with description of new karyotypes
title_sort cytogenetic analyses in trinomys (echimyidae, rodentia), with description of new karyotypes
topic Genetics
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6074804/
https://www.ncbi.nlm.nih.gov/pubmed/30083457
http://dx.doi.org/10.7717/peerj.5316
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