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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 |
Aparece nas coleções: | Artigos |
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artigo.pdf | Texto completo | 106,09 kB | Adobe PDF | Visualizar/Abrir |
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