title: W Chromosome Dynamics in Triportheus Species (Characiformes, Triportheidae): An Ongoing Process Narrated by Repetitive Sequences.
abstract: Characterizing the abundance and genomic distribution of repetitive DNAs provides information on genome evolution, especially regarding the origin and differentiation of sex chromosomes. Triportheus fishes offer a useful model to explore the evolution of sex chromosomes, since they represent a monophyletic group in which all species share a ZZ/ZW sex chromosome system. In this study, we analyzed the distribution of 13 classes of repetitive DNA sequences by FISH, including microsatellites, rDNAs, and transposable elements in 6 Triportheus species, in order to investigate the fate of the sex-specific chromosome among them. These findings show the dynamic differentiation process of the W chromosome concerning changes in the repetitive DNA fraction of the heterochromatin. The differential accumulation of the same class of repeats on this chromosome, in both nearby and distant species, reflects the inherent dynamism of the microsatellites, as well as the plasticity that shapes the evolutionary history of the sex chromosomes, even among closely related species sharing a same sex chromosome system.
authors.affiliation: Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Yano and Cioffi); Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743 Jena, Germany (Liehr); Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil (Troy); Departamento de Genetica e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Bertollo); CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil (Yano).
authors.forename: Cassia Fernanda
authors.initials: CF
authors.lastname: Yano
authors.affiliation: Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Yano and Cioffi); Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743 Jena, Germany (Liehr); Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil (Troy); Departamento de Genetica e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Bertollo); CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil (Yano).
authors.forename: Luiz Antônio Carlos
authors.initials: LA
authors.lastname: Bertollo
authors.affiliation: Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Yano and Cioffi); Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743 Jena, Germany (Liehr); Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil (Troy); Departamento de Genetica e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Bertollo); CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil (Yano).
authors.forename: Thomas
authors.initials: T
authors.lastname: Liehr
authors.affiliation: Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Yano and Cioffi); Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743 Jena, Germany (Liehr); Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil (Troy); Departamento de Genetica e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Bertollo); CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil (Yano).
authors.forename: Waldo Pinheiro
authors.initials: WP
authors.lastname: Troy
authors.affiliation: Departamento de Genética e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Yano and Cioffi); Jena University Hospital, Friedrich Schiller University, Institute of Human Genetics, Kollegiengasse 10, D-07743 Jena, Germany (Liehr); Departamento de Ciências Biológicas, Universidade do Estado de Mato Grosso, Tangará da Serra, Brazil (Troy); Departamento de Genetica e Evolução, Universidade Federal de São Carlos, São Carlos, SP, Brazil (Bertollo); CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil (Yano). mbcioffi@ufscar.br.
authors.forename: Marcelo de Bello
authors.initials: Mde B
authors.lastname: Cioffi
mesh_terms: D000818:Animals; D060125:Characiformes / Q000235:genetics*; D002871:Chromosome Banding; D002874:Chromosome Mapping; D005260:Female; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D018895:Microsatellite Repeats; D012091:Repetitive Sequences, Nucleic Acid; D018626:Retroelements; D012730:Sex Chromosomes
chemical_list: D018626:Retroelements
keywords: FISH; microsatellites; retrotransposons; sex chromosomes differentiation.