Data/hora: 17/06/2024 02:49:48

Provedor de dados: | 74
País: | Brazil
Título: | Chromosome study in Schistocerca (Orthoptera-Acrididae-Cyrtacanthacridinae): karyotypes and distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs)
Autores: | Souza,Maria José de; Melo,Natoniel Franklin de.
Data: | 2007-01-01
Ano: | 2007
Palavras-chave: | Grasshopper; Constitutive heterochromatin; Nucleolus organizer regions.
Resumo: | Chromosome analyses were performed in two grasshopper species of the genus Schistocerca, S. pallens and S. flavofasciata. Both species shared the same diploid number (2n = 23, X in males; 2n = 24, XX in females);and a conserved karyotype composed exclusively of acrocentric chromosomes, but differed in their distribution patterns of constitutive heterochromatin and nucleolus organizer regions (NORs). Constitutive heterochromatin was located in the pericentromeric region of all chromosomes in both species. S. flavofasciata presented an additional C-band on the distal region of the long arm of a small autosome pair (S9). Nucleolus organizer regions (NORs), revealed by silver nitrate staining (Ag-NORs), were observed on a medium autosome pair (M5) in both species. S. pallens presented an additional NOR-bearing autosome (M6). The same sites were labeled after FISH with an rDNA probe in S. pallens cells.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000100011
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572007000100011
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.30 n.1 2007
Fonte: | info:eu-repo/semantics/openAccess