Banding patterns and chromosomal evolution in five species of neotropical Teiinae lizards (Squamata: Teiidae).
Genetica
; 131(3): 231-40, 2007 Nov.
Article
en En
| MEDLINE
| ID: mdl-17206461
Karyotypes of five species of South American teiid lizards from subfamily Teiinae: Ameiva ameiva, Kentropyx calcarata, K. paulensis, K. vanzoi (2n = 50, all acrocentric), and Cnemidophorus ocellifer (2n = 50, all biarmed), are herein described and compared on the basis of conventional and silver staining, and CBG and RBG banding patterns. Meiotic data are also included. Karyotypes of K. paulensis, K. vanzoi, and C. ocellifer are reported here for the first time. Inter-generic variability in Ag-NORs location was detected with NORs occurring at the end of long arm of pair 1 in K. calcarata, K. paulensis, and K. vanzoi; pair 5 in C. ocellifer and pair 7 in A. ameiva. The location of NORs, along with the karyological differences between A. ameiva and the Central American species (A. auberi), corroboretes the molecular-based hypothesis that the genus Ameiva is paraphyletic. Inter-populational heteromorphism in Ag-NORs size was detected between populations of C. ocellifer. RBG and CBG banding data demonstrated that the biarmed condition of the C. ocellifer chromosomes is due to multiple pericentric inversion events instead of addition of constitutive heterochromatin. Differential-staining techniques used here revealed valuable information about Teiinae karyotypic diversity and made it possible to compare these species, contributing to both the better comprehension of their chromosomal evolution and issues on taxa systematics.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Bandeo Cromosómico
/
Cromosomas
/
Evolución Biológica
/
Lagartos
Límite:
Animals
País/Región como asunto:
America do sul
Idioma:
En
Revista:
Genetica
Año:
2007
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Países Bajos