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	Provedor de dados Genet. Mol. Biol. (2) Autor Rego,Letícia do Nascimento Andrade de Almeida (2) Azeredo-Oliveira,Maria Tercília Vilela de (1) Fernandes,Thiago (1) Madi-Ravazzi,Lilian (1) Nardy,Mariana (1) Silistino-Souza,Rosana (1) Vanzela,André Luís Laforga (1) Yuyama,Priscila Mary (1) Mais... Palavra-chave 45S and 5S rDNA (1) Cestrum (1) Chromosome banding (1) Cytochemistry (1) FISH (1) Heterochromatin (1) Meiosis (1) Physical maps (1) Spermatogenesis (1) Ultrastructure (1) Zaprionus indianus (1) Zaprionus sepsoides (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2013 (1) 2009 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Karyotype differentiation of four Cestrum species (Solanaceae) revealed by fluorescent chromosome banding and FISH Genet. Mol. Biol. Fernandes,Thiago; Rego,Letícia do Nascimento Andrade de Almeida; Nardy,Mariana; Yuyama,Priscila Mary; Vanzela,André Luís Laforga. The karyotypes of four South American species of Cestrum (C. capsulare, C. corymbosum, C. laevigatum and C. megalophylum) were studied using conventional staining, C-CMA/DAPI chromosome banding and FISH with 45S and 5S rDNA probes. The karyotypes showed a chromosome number of 2n = 2x = 16, with metacentric chromosomes, except for the eighth submeta- to acrocentric pair. Several types of heterochromatin were detected, which varied in size, number, distribution and base composition. The C-CMA+ bands and 45S rDNA were located predominantly in terminal regions. The C-CMA+/DAPI+ bands appeared in interstitial and terminal regions, and the C-DAPI+ bands were found in all chromosome regions. The 5S rDNA sites were observed on the long arm of pair 8 in all species... Tipo: Info:eu-repo/semantics/article Palavras-chave: Cestrum; Chromosome banding; FISH; Heterochromatin; Physical maps; 45S and 5S rDNA. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000200019 Spermatogenesis of Zaprionus indianus and Zaprionus sepsoides (Diptera, Drosophilidae): cytochemical, structural and ultrastructural characterization Genet. Mol. Biol. Rego,Letícia do Nascimento Andrade de Almeida; Silistino-Souza,Rosana; Azeredo-Oliveira,Maria Tercília Vilela de; Madi-Ravazzi,Lilian. Zaprionus indianus is a drosophilid native to the Afrotropical region that has colonized South America and exhibits a wide geographical distribution. In contrast, Z. sepsoides is restricted to certain African regions. The two species differ in the size of their testes, which are larger in Z. indianus than in Z. sepsoides. To better understand the biology and the degree of differentiation of these species, the current study evaluated spermatogenesis in males of different ages by conventional staining techniques and ultrastructural analysis. Spermatogenesis and the ultrastructure of spermatozoa were similar in the two species, and the diploid number was confirmed to be 2n = 12. A greater number of spermatozoa were observed in young Z. indianus (1-3 days old)... Tipo: Info:eu-repo/semantics/article Palavras-chave: Zaprionus indianus; Zaprionus sepsoides; Spermatogenesis; Cytochemistry; Ultrastructure; Meiosis. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000100008 Registros recuperados: 2 Primeira ... 1 ... Última

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