Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/25913
Tipo: Artigo
Título: Occurrence of B chromosomes in Tetragonisca Latreille, 1811 (Hymenoptera, Apidae, Meliponini): a new contribution to the cytotaxonomy of the genus
Autor(es): Pompolo, Silvia das Graças
Fernandes, Anderson
Barth, Adriane
Costa, Marco Antônio
Abstract: Tetragonisca angustula and Tetragonisca fiebrigi have recently been listed as valid species. This study aimed to cytogenetically investigate both species, emphasizing the new registry of B chromosomes in the tribe Meliponini. We analyzed colonies of T. angustula and T. fiebrigi collected at Tangará da Serra, Mato Grosso, Brazil, through conventional Giemsa staining, C-banding, and base-specific fluorochrome staining (CMA3/DAPI). T. angustula showed 2n = 34 chromosomes in females and n = 17 in males, with karyotype formula 2K = 34AM. T. fiebrigi showed numeric variation, with chromosome number varying from 2n = 34 to 2n = 36 in females and from n = 17 to n=18in males, with karyotype formula 2K = 32AM+2AMc and 2K = 32AM+2AMc + 1 or 2 B-chromosomes. The B chromosomes are heterochromatic. In T. fiebrigi, the CMA3/DAPI staining revealed four chromosomes with a CMA3 positive band. All individuals from the same colony showed the same number of B chromosomes. T. angustula and T. fiebrigi showed karyotype divergence, principally due to the presence of B chromosomes, which are found only in T. fiebrigi. Our data corroborate the status of valid species for both T. angustula and T. fiebrigi, as recently proposed.
Palavras-chave: Stingless bees
Cytogenetics
Interspecific differentiation
B chromosomes
Editor: Genetics and Molecular Biology
Tipo de Acesso: Open Access
URI: http://dx.doi.org/10.1590/S1415-47572010005000100
http://locus.ufv.br//handle/123456789/25913
Data do documento: 2011
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