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	Provedor de dados Genet. Mol. Biol. (2) Autor Collares-Pereira,Maria João (2) Proença,Sónia J. R. (1) Proença,Sónia J.R. (1) Serrano,Artur R. M. (1) Serrano,Artur R.M. (1) Palavra-chave Chromosome evolution (2) RDNA localization (2) Cicindela (1) Cicindelidae (1) Megacephalini (1) Multiple sex chromosomes (1) Oxycheila (1) Sex chromosome system (1) Tiger beetles (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2005 (1) 2004 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Chromosome evolution in tiger beetles: Karyotypes and localization of 18S rDNA loci in Neotropical Megacephalini (Coleoptera, Cicindelidae) Genet. Mol. Biol. Proença,Sónia J.R.; Collares-Pereira,Maria João; Serrano,Artur R.M.. Four Neotropical tiger beetle species, three from the genus Megacephala and one from the genus Oxycheila, currently assigned to the tribe Megacephalini were examined cytogenetically. All three Megacephala species showed simple sex chromosome systems of the X0/XX type but different numbers of autosomal pairs (15 in M. cruciata, 14 in M. sobrina and 12 in M. rutilans), while Oxycheila tristis was inferred to have a multiple sex chromosome system with four X chromosomes (2n = 24 + X1X2X3X4Y/X1X1X2X2X3X3X4X4). Fluorescence in situ hybridization (FISH) using a PCR-amplified 18S rDNA fragment as a probe revealed the presence of rDNA clusters located exclusively on the autosomes in all the Megacephala species (five clusters in M. cruciata, eight in M. sobrina and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome evolution; Cicindelidae; Megacephalini; Oxycheila; RDNA localization; Sex chromosome system. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500012 Cytogenetic variability in three species of the genus Cicindela (s.l.) (Coleoptera, Cicindelidae): karyotypes and localization of 18S rDNA genes Genet. Mol. Biol. Proença,Sónia J. R.; Collares-Pereira,Maria João; Serrano,Artur R. M.. Three tiger beetle species from the Cicindelini tribe were examined cytogenetically and found to have the following karyotypes: Cicindela argentata, 2n = 18 + X1X2Y/X1X1X2X 2; Cicindela aurulenta, 2n=18 + X1X2X3Y/X1X1X 2X2X3X3 and Cicindela suturalis, 2n = 18 + X1X2X3X4Y/X1X 1X2X2X3X3X4X 4. Fluorescence in situ hybridization (FISH) using a PCR-amplified 18S rDNA fragment as a probe showed the presence of ribosomal clusters in two autosomes in C. argentata, two autosomes and two heterosomes in C. aurulenta and in two heterosomes in C. suturalis (male configuration), revealing two new patterns of rDNA localization. Such results are representative of the cytogenetic variability observed in the species rich genus Cicindela (sensu lato) mainly as regards the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosome evolution; Cicindela; Multiple sex chromosomes; RDNA localization; Tiger beetles. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572004000400015 Registros recuperados: 2 Primeira ... 1 ... Última

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