Despite decades of cytogenetic and genomic research of dynamic sex chromosome
evolution in teleost fishes, multiple sex chromosomes have been largely neglected. In this …

Genetic degeneration is an extraordinary feature of sex chromosomes, with the loss of
functions of Y-linked genes in species with XY systems, and W-linked genes in ZW systems …

Sex chromosomes are generally derived from a pair of classical type-A chromosomes, and
relatively few alternative models have been proposed up to now. 1, 2 B chromosomes (Bs) …

Satellites are an abundant source of repetitive DNAs that play an essential role in the
chromosomal organization and are tightly linked with the evolution of sex chromosomes …

Harttia comprises an armored catfish genus endemic to the Neotropical region, including 27
valid species with low dispersion rates that are restricted to small distribution areas …

The Neotropical armored catfish genus Harttia presents a wide variation of chromosomal
rearrangements among its representatives. Studies indicate that translocation and …

Satellite DNAs (satDNAs) are one of the most abundant elements in genomes.
Characterized as tandemly organized sequences that can be amplified into multiple copies …

Homomorphic sex chromosomes and their turnover are common in teleosts. We investigated
the evolution of nascent sex chromosomes in several populations of two sister species of …

The Erythrinidae family (Teleostei: Characiformes) is a small Neotropical fish group with a
wide distribution throughout South America, where Hoplias malabaricus corresponds to the …

The armored Harttia catfishes present great species diversity and remarkable cytogenetic
variation, including different sex chromosome systems. Here we analyzed three new …