TY - JOUR
T1 - Following the Pathway of W Chromosome Differentiation in Triportheus (Teleostei: Characiformes)
AU - de Oliveira, Mariannah Pravatti Barcellos
AU - Kretschmer, Rafael
AU - Deon, Geize Aparecida
AU - Toma, Gustavo Akira
AU - Ezaz, Tariq
AU - Goes, Caio Augusto Gomes
AU - Porto-Foresti, Fábio
AU - Liehr, Thomas
AU - Utsunomia, Ricardo
AU - Cioffi, Marcelo de Bello
N1 - Funding Information:
This work was supported by São Paulo Research Foundation (FAPESP), grant number 2020/11772-8 (M.d.B.C.); 2022/00427-3 (G.A.T.), and by the Brazilian National Council for Scientific and Technological Development (CNPq), grant number 302928/2021-9 (M.d.B.C.). This study was supported by INCT-Peixes, funded by MCTIC/CNPq (proc. 405706/2022-7). We acknowledge the support from the German Research Foundation Projekt-Nr. 512648189 (T.L.) and the Open Access Publication Fund of the Thueringer Universitaets und Landesbibliothek Jena. All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest or non-financial interest in the subject or materials discussed in this manuscript.
Publisher Copyright:
© 2023 by the authors.
PY - 2023/8
Y1 - 2023/8
N2 - In this work, we trace the dynamics of satellite DNAs (SatDNAs) accumulation and elimination along the pathway of W chromosome differentiation using the well-known Triportheus fish model. Triportheus stands out due to a conserved ZZ/ZW sex chromosome system present in all examined species. While the Z chromosome is conserved in all species, the W chromosome is invariably smaller and exhibits differences in size and morphology. The presumed ancestral W chromosome is comparable to that of T. auritus, and contains 19 different SatDNA families. Here, by examining five additional Triportheus species, we showed that the majority of these repetitive sequences were eliminated as speciation was taking place. The W chromosomes continued degeneration, while the Z chromosomes of some species began to accumulate some TauSatDNAs. Additional species-specific SatDNAs that made up the heterochromatic region of both Z and W chromosomes were most likely amplified in each species. Therefore, the W chromosomes of the various Triportheus species have undergone significant evolutionary changes in a short period of time (15–25 Myr) after their divergence.
AB - In this work, we trace the dynamics of satellite DNAs (SatDNAs) accumulation and elimination along the pathway of W chromosome differentiation using the well-known Triportheus fish model. Triportheus stands out due to a conserved ZZ/ZW sex chromosome system present in all examined species. While the Z chromosome is conserved in all species, the W chromosome is invariably smaller and exhibits differences in size and morphology. The presumed ancestral W chromosome is comparable to that of T. auritus, and contains 19 different SatDNA families. Here, by examining five additional Triportheus species, we showed that the majority of these repetitive sequences were eliminated as speciation was taking place. The W chromosomes continued degeneration, while the Z chromosomes of some species began to accumulate some TauSatDNAs. Additional species-specific SatDNAs that made up the heterochromatic region of both Z and W chromosomes were most likely amplified in each species. Therefore, the W chromosomes of the various Triportheus species have undergone significant evolutionary changes in a short period of time (15–25 Myr) after their divergence.
KW - cytogenomics
KW - FISH
KW - satellite DNA
KW - sex chromosomes
UR - http://www.scopus.com/inward/record.url?scp=85169102434&partnerID=8YFLogxK
U2 - 10.3390/biology12081114
DO - 10.3390/biology12081114
M3 - Article
AN - SCOPUS:85169102434
SN - 2079-7737
VL - 12
SP - 1
EP - 11
JO - Biology
JF - Biology
IS - 8
M1 - 1114
ER -