Patricia Pasquali Parise Maltempi

• Abstract

  Although most of fish and amphibians species do not have differentiated sex chromosomes, there is a great diversity concerning the mechanisms of chromosomal sex determination including heterogametic females or males and single or multiple systems. In most cases, a difference between the sex partners involves heterochromatic blocks and this fact is very well established in ZZ/ZW systems in…

  Contributions to the understanding of the origin and evolution of the vertebrate sex chromosomes, based on the repetitive DNAs study., AP.R

• Abstract

  Among the Siluriformes, Loricariidae family is widely distributed with approximately 860 species, of which the tribe Ancistrini is the largest in number of species, having 217 valid species, distributed in 29 genera. The genus Ancistrus, is one of the most diversified tribe and now has 74 nominal species, but still rather dubious taxonomy and many unidentified species. Systematic and phyl…

  Study of chromosomes and molecular phylogeny of the genus Ancistrus (Siluriformes: Loricariidae), AP.R

• Abstract

  While most fish species do not show sex chromosomes differentiated, there is a great diversity concerning the mechanisms of chromosomal sex determination, including heterogametic females or males and single or multiple systems. In most cases, the difference between sex chromosomes involve heterochromatic blocks and this fact is well established in ZZ:ZW system, where loss or gain of heter…

  Study of repetitive elements present in the genome of species of Anostomidae (Pisces, Characiformes), AP.R

(Only some records are available in English at this moment)

• Abstract

  Satellite DNAs are characterized as repetitive DNA sequences organized in tandem, often present in large quantities in the heterochromatin of many organisms. In this study, repetitive sequences in the genome of the frog Proceratophrys laticeps will be analyzed. This species is found in the southeastern regions of the states of Bahia and Espírito Santo, and in the northeastern regions of t…

  Analysis of repetitive sequences in the genome of Proceratophrys laticeps, a frog species endemic to the Brazilian Atlantic Forest, BP.IC

• Abstract

  Satellite DNAs (satDNAs) are non-coding sequences that are highly repeated in tandem, and are usually located in pericentromeric, centromeric and subtelomeric chromosomal regions, and being one of the most abundant components of the eukaryotic genome. These sequences are organized within species into different families, with each species having a library of satellites, whose set can be ca…

  Characterization of the satellite DNA content of the genome of the neotropical fish Psalidodon scabripinnis (Characiformes: Characidae), BP.IC

• Abstract

  The genomes of eukaryotes are characterized by containing a large number of highly dynamic repetitive sequences, either at the chromosomal or nucleotide level, with several factors contributing to their duplication and expansion, modulating or evolving to karyotype evolution in different organisms. Among these sequences, satellite DNAs (satDNAs) are among the most dynamic repetitive eleme…

  Cytogenomic analyzes in Ancistrus (Siluriformes: Loricariidae): search for repetitive sequences and chromosome mapping, BP.IC

(Only some records are available in English at this moment)