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Banding patterns and chromosomal evolution in five species of neotropical Teiinae lizards (Squamata: Teiidae).
dos Santos, Rodrigo Marques Lima; Pellegrino, Katia Cristina Machado; Rodrigues, Miguel Trefaut; Yonenaga-Yassuda, Yatiyo.
Afiliación
  • dos Santos RM; Departamento de Genética e Biologia Evolutiva, Instituto de Biociências, Universidade de São Paulo, São Paulo, SP, C.P. 11.461 CEP 05422-970, Brazil. santosrm@usp.br
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.
Asunto(s)
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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
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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