6 documents found, page 1 of 1
Chromosomal mapping of transposable elements of the rex family in the bristleno...
Favarato, Ramon Marin; Braga Ribeiro, Leila; Feldberg, Eliana; Matoso, D. A.Repetitive DNA sequences are present in the genome of basically every known organism, and transposable elements (TE) are one of the most representative sequences involved in chromosomal rearrangements and the genomic evolution of eukaryotes. In fish, the non-LTR retrotransposon TEs, Rex1, Rex3, and Rex6, are widely distributed in fish genomes and are the best-characterized TEs in several species. In the current...
Comparative cytogenetics of two of the smallest Amazonian fishes: Fluviphylax s...
Souza, E. R.; Braga Ribeiro, Leila; Feldberg, Eliana; Farias, Izeni P.; Hrbek, Tomas; Gross, Maria ClaudiaThe genus Fluviphylax Whitley, 1965 is comprized of five valid species (F. pygmaeus Myers et Carvalho, 1955, F. zonatus, F. simplex, F. obscurus Costa, 1996, and F. palikur Costa et Le Bail, 1999), which are endemic to the Amazon region. These fishes are the smallest known South American vertebrates and among the smallest know vertebrates on Earth. All species but the type F. pygmaeus have been described in lat...
Chromosome mapping of repetitive sequences in four Serrasalmidae species (Chara...
Braga Ribeiro, Leila; Matoso, D. A.; Feldberg, ElianaThe Serrasalmidae family is composed of a number of commercially interesting species, mainly in the Amazon region where most of these fishes occur. In the present study, we investigated the genomic organization of the 18S and 5S rDNA and telomeric sequences in mitotic chromosomes of four species from the basal clade of the Serrasalmidae family: Colossoma macropomum, Mylossoma aureum, M. duriventre, and Piaractu...
Karyotypic variability in Iheringichthys labrosus (Teleostei, Pimelodidae) from...
Braga Ribeiro, Leila; Matoso, D. A.; Almeida, Mara Cristina de; Vicari, Marcelo Ricardo; Moraes-Neto, Américo; Svidnicki, Maria Carolina Costa MeloCytogenetic analyses were carried out in a populational sample of Iheringichthys labrosus from the Guaraúna River (Upper Tibagi River; Paraná State, Brazil) in order to provide a karyotypic comparison with another previously studied population from the Lower Tibagi River, characterized by the presence of 32m + 8sm + 6st + 10a (2n = 56, FN = 102) and occurrence of supernumerary chromosomes (80% of individuals). ...
Is the karyotype of neotropical boid snakes really conserved? Cytotaxonomy, chr...
Viana, Patrik Ferreira; Braga Ribeiro, Leila; Souza, George Myller; Menezes Chalkidis, Hipocrátes de; Gross, Maria Claudia; Feldberg, ElianaBoids are primitive snakes from a basal lineage that is widely distributed in Neotropical region. Many of these species are both morphologically and biogeographically divergent, and the relationship among some species remains uncertain even with evolutionary and phylogenetic studies being proposed for the group. For a better understanding of the evolutionary relationship between these snakes, we cytogenetically...
Fluorescence image analyzer - FLIMA: Software for quantitative analysis of fluo...
Silva, H. C.M.; Martins-Júnior, M. M.C.; Braga Ribeiro, Leila; Matoso, D. A.The Fluorescence Image Analyzer (FLIMA) software was developed for the quantitative analysis of images generated by fluorescence in situ hybridization (FISH). Currently, the images of FISH are examined without a coefficient that enables a comparison between them. Through GD Graphics Library, the FLIMA software calculates the amount of pixels on image and recognizes each present color. The coefficient generated ...