Data/hora: 01/06/2024 00:30:28

Provedor de dados: | 74
País: | Brazil
Título: | Distribution of a Ty3/gypsy-like retroelement on the A and B-chromosomes of Cestrum strigilatum Ruiz &amp;amp; Pav. and Cestrum intermedium Sendtn. (Solanaceae)
Autores: | Fregonezi,Jéferson Nunes; Vilas-Boas,Laurival A.; Fungaro,Maria Helena Pelegrinelli; Gaeta,Marcos Letaif; Vanzela,André Luís Laforga.
Data: | 2007-01-01
Ano: | 2007
Palavras-chave: | Cestrum strigilatum; Cestrum intermedium; Karyotype organization; Retroelements; Solanaceae; Ty3-gypsy.
Resumo: | Retroelements are a diversified fraction of eukaryotic genomes, with the Ty1/copia and Ty3/gypsy groups being very common in a large number of plant genomes. We isolated an internal segment of the Ty3/gypsy retroelement of Cestrum strigilatum (Solanaceae) using PCR amplification with degenerate primers for a conserved region of reverse transcriptase. The isolated segment (pCs12) was sequenced and showed similarity with Ty3/gypsy retroelements of monocotyledons and dicotyledons. This segment was used as probe in chromosomes of C. strigilatum and Cestrum intermedium. Diffuse hybridization signals were observed along the chromosomes and more accentuated terminal signals in some chromosome pairs, always associated with nucleolus organizer regions (NORs). The physical relationship between the hybridization sites of pCs12 and pTa71 ribosomal probes was assessed after sequential fluorescence in situ hybridization (FISH). Hybridization signals were also detected in the B chromosomes of these species, indicating an entail among the chromosomes of A complement and B-chromosomes.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000400017
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572007000400017
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.30 n.3 2007
Fonte: | info:eu-repo/semantics/openAccess