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Tracking the evolutionary pathway of sex chromosomes among fishes: characterizing the unique XX/XY1Y2 system in Hoplias malabaricus (Teleostei, Characiformes)
EA. de Oliveira, A. Sember, LAC. Bertollo, CF. Yano, T. Ezaz, O. Moreira-Filho, T. Hatanaka, V. Trifonov, T. Liehr, ABH. Al-Rikabi, P. Ráb, H. Pains, MB. Cioffi,
Jazyk angličtina Země Rakousko
Typ dokumentu časopisecké články, práce podpořená grantem
NLK
ProQuest Central
od 1997-03-01 do Před 1 rokem
Health & Medicine (ProQuest)
od 1997-03-01 do Před 1 rokem
- MeSH
- hybridizace in situ fluorescenční MeSH
- karyotyp MeSH
- malování chromozomů MeSH
- mikrosatelitní repetice MeSH
- molekulární evoluce * MeSH
- pohlavní chromozomy genetika MeSH
- repetitivní sekvence nukleových kyselin MeSH
- ryby genetika metabolismus MeSH
- srovnávací genomová hybridizace MeSH
- telomery MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
The Neotropical fish, Hoplias malabaricus, is one of the most cytogenetically studied fish taxon with seven distinct karyomorphs (A-G) comprising varying degrees of sex chromosome differentiation, ranging from homomorphic to highly differentiated simple and multiple sex chromosomes. Therefore, this fish offers a unique opportunity to track evolutionary mechanisms standing behind the sex chromosome evolution and differentiation. Here, we focused on a high-resolution cytogenetic characterization of the unique XX/XY1Y2 multiple sex chromosome system found in one of its karyomorphs (G). For this, we applied a suite of conventional (Giemsa-staining, C-banding) and molecular cytogenetic approaches, including fluorescence in situ hybridization FISH (with 5S and 18S rDNAs, 10 microsatellite motifs and telomeric (TTAGGG) n sequences as probes), comparative genomic hybridization (CGH), and whole chromosome painting (WCP). In addition, we performed comparative analyses with other Erythrinidae species to discover the evolutionary origin of this unique karyomorph G-specific XY1Y2 multiple sex chromosome system. WCP experiments confirmed the homology between these multiple sex chromosomes and the nascent XX/XY sex system found in the karyomorph F, but disproved a homology with those of karyomorphs A-D and other closely related species. Besides, the putative origin of such XY1Y2 system by rearrangements of several chromosome pairs from an ancestral karyotype was also highlighted. In addition, clear identification of a male-specific region on the Y1 chromosome suggested a differential pattern of repetitive sequences accumulation. The present data suggested the origin of this unique XY1Y2 sex system, revealing evidences for the high level of plasticity of sex chromosome differentiation within the Erythrinidae.
Departamento de Genética e Evolução Universidade Federal de São Carlos São Carlos SP Brazil
Institute for Applied Ecology University of Canberra Canberra Australia
Institute of Molecular and Cellular Biology SB RAS Novosibirsk Russia
Citace poskytuje Crossref.org
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