Satellite DNAs, heterochromatin, and sex chromosomes of the wattled jacana (Charadriiformes; Jacanidae): a species with highly rearranged karyotype

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de Oliveira, Alan Moura ; Souza, Guilherme Mota ; Toma, Gustavo Akira ; dos Santos, Natalia ; Santos, Rodrigo Zeni dos ; Goes, Caio Augusto Gomes ; Deon, Geize Aparecida ; Setti, Princia Grejo ; Porto-Foresti, Fabio ; Utsunomia, Ricardo ; Gunski, Ricardo Jose ; Garnero, Analia Del Valle ; de Oliveira, Edivaldo Herculano Correa ; Kretschmer, Rafael ; Cioffi, Marcelo de Bello

• Tipo de documento: Artigo Científico
• Fonte: GENOME; v. 67, n. 4, p. 10-pg., 2024-02-05.

Resumo

Charadriiformes, which comprises shorebirds and their relatives, is one of the most diverse avian orders, with over 390 species showing a wide range of karyotypes. Here, we isolated and characterized the whole collection of satellite DNAs (satDNAs) at both molecular and cytogenetic levels of one of its representative species, named the wattled jacana (Jacana jacana), a species that contains a typical ZZ/ZW sex chromosome system and a highly rearranged karyotype. In addition, we also investigate the in situ location of telomeric and microsatellite repeats. A small catalog of 11 satDNAs was identified that typically accumulated on microchromosomes and on the W chromosome. The latter also showed a significant accumulation of telomeric signals, being (GA)10 the only microsatellite with positive hybridization signals among all the 16 tested ones. These current findings contribute to our understanding of the genomic organization of repetitive DNAs in a bird species with high degree of chromosomal reorganization contrary to the majority of bird species that have stable karyotypes. (AU)

• Processo FAPESP: 22/14585-0 - Estudos Citogenéticos na Pirambóia Lepidosiren paradoxa (Sarcopterygii, Dipnoi).
• Beneficiário: Alan Moura de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 22/00427-3 - Origem e diferenciação do sistema de cromossomos sexuais múltiplos X1X2Y: análises do Satelitoma em espécies de peixes, répteis e mamíferos
• Beneficiário: Gustavo Akira Toma
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto