Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/12887
Tipo: Artigo
Título: First cytogenetic characterization of a species of the arboreal ant genus Azteca Forel, 1978 (Dolichoderinae, Formicidae)
Autor(es): Cardoso, Danon Clemes
Cristiano, Maykon Passos
Barros, Luísa Antônia Campos
Lopes, Denilce Meneses
Pompolo, Silvia das Graças
Abstract: In this paper we present, for the first time, a detailed karyotype characterization of a species of the genus Azteca (Dolichoderinae, Formicidae). Cerebral ganglia from Azteca trigona Emery, 1893 were excised and submitted to colchicine hypotonic solution and chromosomal preparations were analyzed through conventional staining with Giemsa, C-banding, silver nitrate staining (AgNO3) and sequential base-specific fluorochromes. The analysis shows that Azteca trigona has a diploid number of 28 chromosomes. The karyotype consists of five metacentric pairs, seven acrocentric pairs and two pseudo-acrocentric pairs, which represents a karyotype formula 2K= 10M + 14A + 4AM and a diploid number of the arms 2AN = 38. The analysis of heterochromatin distribution revealed a positive block on distal region of the short arm of fourth metacentric pair, which was coincident with Ag-NOR band and CMA3 fluorochrome staining, meaning that rDNA sequences are interspaced by GC-rich base pairs sequences. The C-banding also marked short arms of other chromosomes, indicating centric fissions followed by heterochromatin growth. The karyotype analysis of Azteca trigona allowed the identification of cytogenetic markers that will be helpful in a difficult taxonomic group as Azteca and discussion about evolutionary aspects of the genome organization.
Palavras-chave: Karyotype
Chromosome number
Chromosome banding
Ants
Azteca trigona
Editor: Comparative Cytogenetics
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.3897/CompCytogen.v6i2.2397
http://www.locus.ufv.br/handle/123456789/12887
Data do documento: 16-Mar-2012
Aparece nas coleções:Artigos

Arquivos associados a este item:
Arquivo Descrição TamanhoFormato 
CompCytogen-006-107.pdftexto completo1,21 MBAdobe PDFThumbnail
Visualizar/Abrir


Os itens no repositório estão protegidos por copyright, com todos os direitos reservados, salvo quando é indicado o contrário.