Differential staining and microchromosomal variation in karyotypes of four Brazilian species of Tupinambinae lizards (Squamata : Teiidae)

Differential staining and microchromosomal variation in karyotypes of four Brazilian species of Tupinambinae lizards (Squamata : Teiidae)

Autor Lima dos Santos, Rodrigo Marques Google Scholar
Rodrigues, Miguel Trefaut Google Scholar
Yonenaga-Yassuda, Yatiyo Google Scholar
Machado Pellegrino, Katia Cristina Autor UNIFESP Google Scholar
Instituição Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Resumo Kayotypes of four neotropical teiid lizard species (Tupinambinae) were herein studied after conventional as well as silver staining and CBG-banding: Crocodilurus amazonicus (2n = 34), Tupinambis teguixin (2n = 36), Tupinambis merianae and Tupinambis quadrilineatus (2n = 38). the karyological data for T. quadrilineatus as well as those obtained using differential staining for all species were unknown until now. the karyotypes of all species presented 12 macrochromosomes identical in morphology, but differed in the number of microchromosomes: 22 in C. amazonicus, 24 in T. teguixin and 26 in T. quadrilineatus and T. merianae. the Ag-NOR located at the secondary constriction at the distal end of pair 2 is shared by all species, contrasting with the variability observed for this character in species of the related Teiinae. CBG-banding revealed a species-specific pattern in T. quadrilineatus with conspicuous interstitial C-blocks at the proximal region of the long arm of pair 4 and the whole heterochromatic short arm of pair 6. the karyological data reported here corroborates the relationship hypothesis obtained for Tupinambis based on molecular characters. T. teguixin presents the putative ancestral karyotype for the genus with 2n = 36 whereas T. merianae and T. quadrilineatus exhibit 2n = 38, due to an additional pair of microchromosomes.
Palavra-chave Teiidae
Tupinambis
karyotypes
differential staining
lizards
Idioma Inglês
Financiador Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Data de publicação 2008-11-01
Publicado em Genetica. Dordrecht: Springer, v. 134, n. 3, p. 261-266, 2008.
ISSN 0016-6707 (Sherpa/Romeo, fator de impacto)
Publicador Springer
Extensão 261-266
Fonte http://dx.doi.org/10.1007/s10709-007-9233-7
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000259187200001
Endereço permanente http://repositorio.unifesp.br/handle/11600/30995

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