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	Provedor de dados Genet. Mol. Biol. (2) Autor Proença,Sónia J.R. (2) Collares-Pereira,M.J. (1) Collares-Pereira,Maria João (1) Serrano,A.R.M. (1) Serrano,Artur R.M. (1) Palavra-chave Chromosome evolution (1) Cicindelidae (1) Megacephalini (1) Oxycheila (1) RDNA localization (1) Sex chromosome system (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2005 (1) 1999 (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 Karyological study of cicindelidia trifasciata (coleoptera, cicindelidae) from cuba: evidence of B chromosomes Genet. Mol. Biol. Proença,Sónia J.R.; Collares-Pereira,M.J.; Serrano,A.R.M.. Metaphases from germinal tissue of eight males and seven females of Cicindelidia trifasciata from Cuba were analyzed. The species karyotype does not fit the pattern described for Nearctic cicindelids (2n = 18 + XXY): it has 11 autosome pairs and a sex chromosome system of the X1X2X3Y/ X1X1X2X2 X3X3 type, thus a diploid value of 2n = 26 in males and 2n = 28 in females. The first two autosome pairs were almost twice as large as the remaining chromosomes, and the sex elements were morphologically well differentiated. This population was found to be polymorphic for supernumerary chromosomes at both the intraindividual and interindividual levels. An extra small B chromosome was observed in all metaphases of one male (2n = 27), and every female showed metaphases... Tipo: Info:eu-repo/semantics/article Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47571999000100010 Registros recuperados: 2 Primeira ... 1 ... Última

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