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	Provedor de dados Genet. Mol. Biol. (2) Autor Costa,Marco Antônio (2) Barth,Adriane (1) Carvalho,Antônio F. (1) Fernandes,Anderson (1) Pompolo,Silvia das Graças (1) Palavra-chave Interspecific differentiation (2) B chromosomes (1) C-banding (1) Cytogenetics (1) Frieseomelitta (1) Heterochromatin (1) Hymenoptera (1) Stingless bees (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2011 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Cytogenetic characterization of two species of Frieseomelitta Ihering, 1912 (Hymenoptera, Apidae, Meliponini) Genet. Mol. Biol. Carvalho,Antônio F.; Costa,Marco Antônio. The cytogenetic analysis of Frieseomelitta dispar and F. francoi revealed the chromosome numbers 2n = 30 and n = 15 and a karyotypic formula 2K = 4M+2Mt+4A+20A M. The number of chromosomes observed was consistent with those reported for other Frieseomelitta species. The occurrence of the Mt chromosome and other features of the karyotype formulae suggest a close relationship between F. dispar, F. francoi and F. varia. Nevertheless, it was possible to differentiate the karyotypes of the species by DAPI/CMA3 staining, which revealed GC-rich regions on two chromosome pairs of F. dispar: one acrocentric and one pseudoacrocentric. In F. francoi, the same kinds of regions were observed on a pair of metacentrics and on a pair of acrocentrics. Our analysis also... Tipo: Info:eu-repo/semantics/article Palavras-chave: Hymenoptera; Frieseomelitta; Interspecific differentiation; C-banding; Heterochromatin. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200012 Occurrence of B chromosomes in Tetragonisca Latreille, 1811 (Hymenoptera, Apidae, Meliponini): a new contribution to the cytotaxonomy of the genus Genet. Mol. Biol. Barth,Adriane; Fernandes,Anderson; Pompolo,Silvia das Graças; Costa,Marco Antônio. 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 = 34A M. 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 = 32A M+2A Mc and 2K = 32A M+2A Mc + 1 or 2 B-chromosomes. The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Stingless bees; Cytogenetics; Interspecific differentiation; B chromosomes. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100014 Registros recuperados: 2 Primeira ... 1 ... Última

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