Ray-finned fishes (Actinopterygii) are a very diverse group of vertebrates, encompassing
species adapted to live in freshwater and marine environments, from the deep sea to high …

Repetitive DNA is an intriguing portion of the genome still not completely discovered and
shows a high variability in terms of sequence, genomic organization, and evolutionary …

Abstract Background The fish, Erythrinus erythrinus, shows an interpopulation diversity, with
four karyomorphs differing by chromosomal number, chromosomal morphology and …

Background Sympatric species pairs are particularly common in freshwater fishes
associated with postglacial lakes in northern temperate environments. The nature of …

To enhance our understanding of the organization of the genome and chromosome
evolution of cichlid fish species, we have isolated and physically mapped onto the …

Background Diverse plant and animal species have B chromosomes, also known as
accessory, extra or supernumerary chromosomes. Despite being widely distributed among …

Background Among multigene families, ribosomal RNA (rRNA) genes are the most
frequently studied and have been explored as cytogenetic markers to study the evolutionary …

Cichlids are important in the aquaculture and ornamental fish trade and are considered
models for evolutionary biology. However, most studies of cichlids have investigated African …

Transposable elements are repetitive sequences with the capacity to move inside of the
genome. They constitute the majority of the eukaryotic genomes, and are extensively …

Abstract Background Transposable elements (TEs) have the potential to produce broad
changes in the genomes of their hosts, acting as a type of evolutionary toolbox and …