title: Chromosomal location of retrotransposable REX 1 in the genomes in fiveProchilodus(Teleostei: Characiformes.
abstract: Transposable elements are repetitive DNA sequences comprising a group of segments able to move and carry sequences within the genome. Studies involving comparative genomics have revealed that most vertebrates have different populations of transposable elements with significant differences among species of the same lineage. Few studies have been conducted in fish, the most diverse group of vertebrates, with the objective to locate different types of transposable elements. Therefore, this study proposed to map the retrotransposable element Rex1 applying Fluorescent in situ Hybridization (FISH) in five species of the genusProchilodus(Prochilodus argenteus, Prochilodus brevis, Prochilodus costatus, Prochilodus lineatusandProchilodus nigricans). After the application of the Rex1 probe, scattered markings were found throughout the genome of analyzed species, and also the presence of small clusters located in the centromeric and telomeric regions coincident with the heterochromatin distribution pattern. This was the first description of the retrotransposable element Rex1 inProchilodusgenome seeking for a better understanding of the distribution pattern of these retrotransposons in the genome of teleost fish.
authors.affiliation: Departamento Ciências Biológicas; Faculdade de Ciências; Universidade Estadual Paulista (UNESP); Campus de Bauru; Bauru, São Paulo Brazil.
authors.forename: Tatiana Aparecida
authors.initials: TA
authors.lastname: Voltolin
authors.forename: Bruna Bueno
authors.initials: BB
authors.lastname: Mendonça
authors.forename: Daniela Cristina
authors.initials: DC
authors.lastname: Ferreira
authors.forename: José Augusto
authors.initials: JA
authors.lastname: Senhorini
authors.forename: Fausto
authors.initials: F
authors.lastname: Foresti
authors.forename: Fábio
authors.initials: F
authors.lastname: Porto-Foresti
keywords: conserved karyotypic; dispersed elements; fish; genome; heterochromatic