Repetitive DNA Mapping Reveals Multiple Sex Chromosomes X<sub>1</sub>X<sub>1</sub>X<sub>2</sub>X<sub>2</sub>/X<sub>1</sub>X<sub>2</sub>Y in Pseudotylosurus microps (Günther 1866) (Beloniformes, Teleostei) from the Amazon
These findings describe a multiple sex chromosome system of the type X1X1X2X2/X1X2Y. The C-banding pattern and 5S rDNA mapping suggest that this system likely resulted from a tandem fusion between a homolog of pair 1 and a homolog of pair 3, producing a large acrocentric Y chromosome. We propose that karyotypic changes due to internal chromosomal rearrangements, as observed in P. microps, can lead to species diversification and, in some cases, the emergence of a heteromorphic and multiple sex chromosome system.
Authors
- Erika Milena Corrêa Guimarães
- José Francisco de Sousa e Souza
- Leandro Marajó (ORCID: https://orcid.org/0000-0002-4788-112X)
- Eliana Feldberg (ORCID: https://orcid.org/0000-0002-2962-4541)
- Vanessa Susan Pinheiro-Figliuolo
- Patrik F. Viana (ORCID: https://orcid.org/0000-0002-8172-0725)
Institutions
- Instituto Nacional de Pesquisas da Amazônia (BR)
Publication Details
- Journal
- Sexual Development
- Published
- 2025-02-24
- DOI
- https://doi.org/10.1159/000544037
- Primary Topic
- Fish biology, ecology, and behavior
- Type
- article
- Field-Weighted Citation Impact
- 0.00