Počet záznamů: 1  

Chromosomal Evolution in Lower Vertebrates: Sex Chromosomes in Neotropical Fishes

  1. 1. 0483874 - UZFG-Y 2018 RIV CH eng J - Článek v odborném periodiku
    Cioffi, M. de B. - Yano, C. F. - Sember, Alexandr - Bertollo, L.A.C.
    Chromosomal Evolution in Lower Vertebrates: Sex Chromosomes in Neotropical Fishes.
    Genes. Roč. 8, č. 10 (2017), č. článku 258. ISSN 2073-4425
    Grant CEP: GA MŠk EF15_003/0000460
    Institucionální podpora: RVO:67985904
    Klíčová slova: alternative evolutionary models * simple and multiple sex chromosomes * independent and common origins
    Kód oboru RIV: EB - Genetika a molekulární biologie
    Obor OECD: Genetics and heredity (medical genetics to be 3)
    Impakt faktor: 3.191, rok: 2017

    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.
    Trvalý link: http://hdl.handle.net/11104/0279050