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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 |
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