| Texto completo | |
| Autor(es): |
Cioffi, Marcelo de Bello
[1]
;
Yano, Cassia Fernanda
[1]
;
Sember, Alexandr
[2]
;
Carlos Bertollo, Luiz Antonio
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Fed Sao Carlos, Dept Genet & Evolucao, BR-13565905 Sao Carlos, SP - Brazil
[2] Czech Acad Sci, Inst Anim Physiol & Genet, Lab Fish Genet, Rumburska 89, Libechov 27721 - Czech Republic
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo de Revisão |
| Fonte: | GENES; v. 8, n. 10 OCT 2017. |
| Citações Web of Science: | 5 |
| Resumo | |
Fishes exhibit the greatest diversity of species among vertebrates, offering a number of relevant models for genetic and evolutionary studies. The investigation of sex chromosome differentiation is a very active and striking research area of fish cytogenetics, as fishes represent one of the most vital model groups. Neotropical fish species show an amazing variety of sex chromosome systems, where different stages of differentiation can be found, ranging from homomorphic to highly differentiated sex chromosomes. Here, we draw attention on the impact of recent developments in molecular cytogenetic analyses that helped to elucidate many unknown questions about fish sex chromosome evolution, using excellent characiform models occurring in the Neotropical region, namely the Erythrinidae family and the Triportheus genus. While in Erythrinidae distinct XY and/or multiple XY-derived sex chromosome systems have independently evolved at least four different times, representatives of Triportheus show an opposite scenario, i.e., highly conserved ZZ/ZW system with a monophyletic origin. In both cases, recent molecular approaches, such as mapping of repetitive DNA classes, comparative genomic hybridization (CGH), and whole chromosome painting (WCP), allowed us to unmask several new features linked to the molecular composition and differentiation processes of sex chromosomes in fishes. (AU) | |
| Processo FAPESP: | 16/22196-2 - Uma abordagem intercontinental para a investigação da evolução cromossômica na ordem Osteoglossiformes (Teleostei: Osteoglossomorpha). Parte II |
| Beneficiário: | Marcelo de Bello Cioffi |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |