Francisco de Menezes Cavalcante Sassi

Rapid turnover of sex chromosomes is associated with speciation in Neotropical armored catfish Harttia (Siluriformes, Loricariidae)

Abstract Background The Neotropical armored catfish genus Harttia is an exceptional model for studying sex chromosome evolution, as it harbors the highest diversity of multiple sex chromosome systems known among fishes. However, the evolutionary history of these systems and their...

Molecular divergence and genomic composition of B chromosomes in the fish Cyphocharax modestus (Characiformes, Curimatidae)

Abstract B chromosomes are supernumerary elements that evolve from standard A chromosomes and are primarily composed of repetitive DNAs, yet their origin, diversification, and molecular composition remain poorly understood in most vertebrates. We investigated two allopatric popul...