Turnover of multiple sex chromosomes in Harttia catfish (Siluriformes, Loricariidae): a glimpse from whole chromosome painting

Autor(es)

Sassi, Francisco de Menezes Cavalcante ; Deon, Geize Aparecida ; Sember, Alexandr ; Liehr, Thomas ; Oyakawa, Osvaldo Takeshi ; Moreira Filho, Orlando ; Bertollo, Luiz Antonio Carlos ; Vicari, Marcelo Ricardo ; Cioffi, Marcelo de Bello

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN GENETICS; v. 14, p. 8-pg., 2023-07-28.

Resumo

The remarkable fish biodiversity encompasses also great sex chromosome variability. Harttia catfish belong to Neotropical models for karyotype and sex chromosome research. Some species possess one of the three male-heterogametic sex chromosome systems, XY, X1X2Y or XY1Y2, while other members of the genus have yet uncharacterized modes of sex determination. Particularly the XY1Y2 multiple sex chromosome system shows a relatively low incidence among vertebrates, and it has not been yet thoroughly investigated. Previous research suggested two independent X-autosome fusions in Harttia which led to the emergence of XY1Y2 sex chromosome system in three of its species. In this study, we investigated evolutionary trajectories of synteny blocks involved in this XY1Y2 system by probing six Harttia species with whole chromosome painting (WCP) probes derived from the X (HCA-X) and the chromosome 9 (HCA-9) of H. carvalhoi. We found that both painting probes hybridize to two distinct chromosome pairs in Amazonian species, whereas the HCA-9 probe paints three chromosome pairs in H. guianensis, endemic to Guyanese drainages. These findings demonstrate distinct evolutionary fates of mapped synteny blocks and thereby elevated karyotype dynamics in Harttia among the three evolutionary clades. (AU)

• Processo FAPESP: 20/02681-9 - Relações evolutivas e história demográfica em espécies de Loricariidae (Siluriformes), com ênfase no gênero Harttia
• Beneficiário: Francisco de Menezes Cavalcante Sassi
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 20/11772-8 - Uma abordagem integrativa para a análise de processos dispersivos, adaptativos e evolutivos entre espécies relacionadas com distribuição intercontinental: a família Osteoglossidae (Teleostei, Osteoglossiformes) como modelo investigativo: parte IV
• Beneficiário: Marcelo de Bello Cioffi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 22/04261-2 - Integrando citogenética e genômica: evolução dos sistemas de cromossomos sexuais em espécies de Harttia (Siluriformes, Loricariidae)
• Beneficiário: Francisco de Menezes Cavalcante Sassi
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado