Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon

The chromosomes of 14 specimens of the genus Reithrodon from three different localities of Argentina and two localities of Uruguay were studied using G-and C-banding techniques. Specimens of Uruguay showed a karyotype of 2n=28 chromosomes having a large metacentric X, and a telocentric Y chromosome....

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Detalles Bibliográficos
Autor principal: Ortells, Marcelo Oscar
Publicado: 1988
Materias:
animal
article
chromosome banding pattern
chromosome translocation
female
genetics
karyotyping
male
Muridae
sex chromosome
Animal
Chromosome Banding
Female
Karyotyping
Male
Microtinae
Sex Chromosomes
Support, Non-U.S. Gov't
Translocation (Genetics)
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v77_n1_p53_Ortells
http://hdl.handle.net/20.500.12110/paper_00166707_v77_n1_p53_Ortells
Aporte de:
Aportado por : Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires .
id paper:paper_00166707_v77_n1_p53_Ortells
record_format dspace
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic animal
article
chromosome banding pattern
chromosome translocation
female
genetics
karyotyping
male
Muridae
sex chromosome
Animal
Chromosome Banding
Female
Karyotyping
Male
Microtinae
Sex Chromosomes
Support, Non-U.S. Gov't
Translocation (Genetics)
spellingShingle animal
article
chromosome banding pattern
chromosome translocation
female
genetics
karyotyping
male
Muridae
sex chromosome
Animal
Chromosome Banding
Female
Karyotyping
Male
Microtinae
Sex Chromosomes
Support, Non-U.S. Gov't
Translocation (Genetics)
Ortells, Marcelo Oscar
Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon
topic_facet animal
article
chromosome banding pattern
chromosome translocation
female
genetics
karyotyping
male
Muridae
sex chromosome
Animal
Chromosome Banding
Female
Karyotyping
Male
Microtinae
Sex Chromosomes
Support, Non-U.S. Gov't
Translocation (Genetics)
description The chromosomes of 14 specimens of the genus Reithrodon from three different localities of Argentina and two localities of Uruguay were studied using G-and C-banding techniques. Specimens of Uruguay showed a karyotype of 2n=28 chromosomes having a large metacentric X, and a telocentric Y chromosome. This karyotype is very similar to that recently described in a sample from southern Brazil, differing only in the nature of the Y chromosome, which is metacentric in the Brazilian form. All specimens from Argentina showed a 2n=34 karyotype, differing from the Brazilian karyotype by two centric fusions, an acquisition of chromosome material, and at least one pericentric inversion, and by the telocentric nature of both the X and the Y chromosomes. G-and C-banding suggest that the metacentric gonosomes in the Brazilian form resulted from a double autosomal-X-Y Robertsonian translocation. The Uruguayan cytotype is interpreted as derived from a hypothetical neo-X/Y1Y2 ancestral form by the secondary loss of the Y1 chromosome. The karyotypic differences between the Brazilian-Uruguayan and the Argentinian forms afford evidence of species differentiation. It is proposed to assign the former to Reithrodon typicus, and the later to R. auritus. © 1988 Kluwer Academic Publishers.
author Ortells, Marcelo Oscar
author_facet Ortells, Marcelo Oscar
author_sort Ortells, Marcelo Oscar
title Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon
title_short Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon
title_full Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon
title_fullStr Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon
title_full_unstemmed Cytogenetics and karyosystematics of phyllotine rodents (Cricetidae, Sigmodontinae) I. Chromosome multiformity and gonosomal-autosomal translocation in Reithrodon
title_sort cytogenetics and karyosystematics of phyllotine rodents (cricetidae, sigmodontinae) i. chromosome multiformity and gonosomal-autosomal translocation in reithrodon
publishDate 1988
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v77_n1_p53_Ortells
http://hdl.handle.net/20.500.12110/paper_00166707_v77_n1_p53_Ortells
work_keys_str_mv AT ortellsmarcelooscar cytogeneticsandkaryosystematicsofphyllotinerodentscricetidaesigmodontinaeichromosomemultiformityandgonosomalautosomaltranslocationinreithrodon
bdutipo_str Repositorios
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