New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina

The non-differentially stained karyotypes of four chromosomally unknown species of Ctenomys, C. bergi, C. fodax, C. knightii, C. pundti, and a probably new species from Patagonia, are described. Amendments are also made of the previously recorded karyotypes of C. latro and C. occultus. The karyotype...

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Autores principales: Massarini, Alicia Isabel, Ortells, Marcelo Oscar
Publicado: 1992
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v56_n4_p603_Reig
http://hdl.handle.net/20.500.12110/paper_00251461_v56_n4_p603_Reig
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_00251461_v56_n4_p603_Reig2023-06-08T14:52:37Z New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina Massarini, Alicia Isabel Ortells, Marcelo Oscar The non-differentially stained karyotypes of four chromosomally unknown species of Ctenomys, C. bergi, C. fodax, C. knightii, C. pundti, and a probably new species from Patagonia, are described. Amendments are also made of the previously recorded karyotypes of C. latro and C. occultus. The karyotypes of C. opimus luteolus, C. tucumanus, and C. sociabilis are confirmed through new material or new localities. Karyotypic variants of C. rionegrensis and C. talarum are also reported. The C-banded karyotypes of 20 species and 26 populations are described and illustrated. Heterochromatin in Ctenomys is highly variable and includes six different types : absent, centric, pericentro-meric blocks, full arm blocks, interstitial, and telomeric, the two latter being the less frequent. Most species of tuco-tucos can be sorted into four different heterochromatin patterns. The evolutionary meaning of heterochromatin patterns is discussed in the context of new ideas on the role of highly repetitive DNA in chromosomal evolution. © 1992, Walter de Gruyter. All rights reserved. Fil:Massarini, A.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ortells, M.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1992 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v56_n4_p603_Reig http://hdl.handle.net/20.500.12110/paper_00251461_v56_n4_p603_Reig
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The non-differentially stained karyotypes of four chromosomally unknown species of Ctenomys, C. bergi, C. fodax, C. knightii, C. pundti, and a probably new species from Patagonia, are described. Amendments are also made of the previously recorded karyotypes of C. latro and C. occultus. The karyotypes of C. opimus luteolus, C. tucumanus, and C. sociabilis are confirmed through new material or new localities. Karyotypic variants of C. rionegrensis and C. talarum are also reported. The C-banded karyotypes of 20 species and 26 populations are described and illustrated. Heterochromatin in Ctenomys is highly variable and includes six different types : absent, centric, pericentro-meric blocks, full arm blocks, interstitial, and telomeric, the two latter being the less frequent. Most species of tuco-tucos can be sorted into four different heterochromatin patterns. The evolutionary meaning of heterochromatin patterns is discussed in the context of new ideas on the role of highly repetitive DNA in chromosomal evolution. © 1992, Walter de Gruyter. All rights reserved.
author Massarini, Alicia Isabel
Ortells, Marcelo Oscar
spellingShingle Massarini, Alicia Isabel
Ortells, Marcelo Oscar
New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina
author_facet Massarini, Alicia Isabel
Ortells, Marcelo Oscar
author_sort Massarini, Alicia Isabel
title New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina
title_short New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina
title_full New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina
title_fullStr New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina
title_full_unstemmed New karyotypes and C-banding patterns of the subterranean rodents of the genus Ctenomys (Caviomorpha, Octodontidae) from Argentina
title_sort new karyotypes and c-banding patterns of the subterranean rodents of the genus ctenomys (caviomorpha, octodontidae) from argentina
publishDate 1992
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00251461_v56_n4_p603_Reig
http://hdl.handle.net/20.500.12110/paper_00251461_v56_n4_p603_Reig
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