Comparative cytogenetics among Leporinusfriderici and Leporellusvittatus populations (Characiformes, Anostomidae): focus on repetitive DNA elements.

ABSTRACT: Anostomidae are a neotropical fish family rich in number of species. Cytogenetically, they show a conserved karyotype with 2n = 54 chromosomes, although they present intraspecific/interspecific variations in the number and chromosomal location of repetitive DNA sequences. The aim of the present study was to perform a comparative description of the karyotypes of two populations of Leporinusfriderici Bloch, 1794 and three populations of Leporellusvittatus Valenciennes, 1850. We used conventional cytogenetic techniques allied to fluorescence in situ hybridization, using 18S ribosomal DNA (rDNA) and 5S rDNA, a general telomere sequence for vertebrates (TTAGGG)n and retrotransposon (RTE) Rex1 probes. The anostomids in all studied populations presented 2n = 54 chromos

SUBMITTER: Aparecida Dulz T 

PROVIDER: S-EPMC6477813 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature