| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000420132 |
| ISSN: | 0001-3765 |
| Authors: | Falcione, Camila1 Hernando, Alejandra1 Bressa, María José2 |
| Institutions: | 1Universidad Nacional del Nordeste, Facultad de Ciencias Exactas y Naturales y Agrimensura, Corrientes. Argentina 2Universidad de Buenos Aires, Instituto de Ecología, Genética y Evolución de Buenos Aires, Buenos Aires. Argentina |
| Year: | 2018 |
| Season: | Jun |
| Volumen: | 90 |
| Number: | 2 |
| Pages: | 1417-1429 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Taxonómico |
| English 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 |
| Disciplines: | Biología |
| Keyword: | Biología celular, Genética, Anfibios y reptiles, Erythrolamprus almadensis, Ag-NORs, Bandas en C, Xenodontini, Bandas fluorescentes, rDNA-FISH, Cromosomas sexuales |
| Keyword: | Cell biology, Genetics, Amphibians and reptiles, Erythrolamprus almadensis, Ag-NOR, C-banding, Xenodontini, Fluorescent banding, rDNA-FISH, Sex chromosomes |
| Full text: | Texto completo (Ver PDF) |
