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Abstract:

We described the karyotypes of five snake taxa from Argentina: Erythrolamprus almadensis, E. ceii, E. poecilogyrus caesius, E. p. schotti and E. p. sublineatus, and also intergrading individuals between the last two subspecies by conventional staining, chromosome bandings and fluorescent in situ hybridization (FISH) with 28S ribosomal DNA probes. Erythrolamprus ceii and E. almadensis share a diploid chromosome number of 2n= 28, whereas in E. poecilogyrus intraspecific variations were observed: E. p. caesius has 2n= 28, E. p. schotti and E. p. sublineatus as well as in the intergrading individuals have 2n= 32. In E. almadensis and E. p. caesius, the 2nd and 6th chromosome pairs respectively are heteromorphic by size, morphology and C-banding pattern. These results allow us to suggest that these chromosome pairs might be considered as the ZW sex chromosomes in these species. The present comparative cytogenetic analyzes contributes to the already remarkable karyotypic variability in Erythrolamprus genus and propose a hypothesis about potential mechanisms involved in the chromosome evolution among taxa analyzed. Furthermore, the karyotypic differences observed between E. p. caesius (2n= 28) and E. p. schotti and E. p. sublineatus (2n= 32) might play a causal role in speciation. © 2018, Academia Brasileira de Ciencias. All rights reserved.

Registro:

Documento: Artículo
Título:Comparative cytogenetic analysis in Erythrolamprus snakes (Serpentes: Dipsadidae) from Argentina
Autor:Falcione, C.; Hernando, A.; Bressa, M.J.
Filiación:Laboratorio de Herpetología, Facultad de Ciencias Exactas y Naturales y Agrimensura, Universidad Nacional del Nordeste, Avenida Libertad 5470, Corrientes, 3400, Argentina
Instituto de Ecología, Genética y Evolución de Buenos Aires/IEGEBA - CONICET, Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Avenida Intendente Güiraldes, 2160, 4º piso, Pabellón II (C1428EHA), Ciudad Autónoma de Buenos Aires, Argentina
Palabras clave:Ag-NOR; C-banding; Fluorescent banding; rDNA-FISH; Sex chromosomes; Xenodontini; ribosome DNA; animal; Argentina; chromosome; chromosome analysis; chromosome banding pattern; Colubridae; diploidy; female; fluorescence in situ hybridization; genetics; karyotype; karyotyping; male; sex chromosome; Animals; Argentina; Chromosome Banding; Chromosomes; Colubridae; Cytogenetic Analysis; Diploidy; DNA, Ribosomal; Female; In Situ Hybridization, Fluorescence; Karyotype; Karyotyping; Male; Sex Chromosomes
Año:2018
Volumen:90
Número:2
Página de inicio:1417
Página de fin:1429
DOI: http://dx.doi.org/10.1590/0001-3765201820170374
Título revista:Anais da Academia Brasileira de Ciencias
Título revista abreviado:Anais Acad. Bras. Cienc.
ISSN:00013765
CAS:DNA, Ribosomal
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00013765_v90_n2_p1417_Falcione

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Citas:

---------- APA ----------
Falcione, C., Hernando, A. & Bressa, M.J. (2018) . Comparative cytogenetic analysis in Erythrolamprus snakes (Serpentes: Dipsadidae) from Argentina. Anais da Academia Brasileira de Ciencias, 90(2), 1417-1429.
http://dx.doi.org/10.1590/0001-3765201820170374
---------- CHICAGO ----------
Falcione, C., Hernando, A., Bressa, M.J. "Comparative cytogenetic analysis in Erythrolamprus snakes (Serpentes: Dipsadidae) from Argentina" . Anais da Academia Brasileira de Ciencias 90, no. 2 (2018) : 1417-1429.
http://dx.doi.org/10.1590/0001-3765201820170374
---------- MLA ----------
Falcione, C., Hernando, A., Bressa, M.J. "Comparative cytogenetic analysis in Erythrolamprus snakes (Serpentes: Dipsadidae) from Argentina" . Anais da Academia Brasileira de Ciencias, vol. 90, no. 2, 2018, pp. 1417-1429.
http://dx.doi.org/10.1590/0001-3765201820170374
---------- VANCOUVER ----------
Falcione, C., Hernando, A., Bressa, M.J. Comparative cytogenetic analysis in Erythrolamprus snakes (Serpentes: Dipsadidae) from Argentina. Anais Acad. Bras. Cienc. 2018;90(2):1417-1429.
http://dx.doi.org/10.1590/0001-3765201820170374