PMID: 9421268Jan 8, 1998Paper

The X1X2Y sex chromosome system in the fish Hoplias malabaricus. I. G-, C- and chromosome replication banding

Chromosome Research : an International Journal on the Molecular, Supramolecular and Evolutionary Aspects of Chromosome Biology
Luiz A C BertolloJ Cano

Abstract

Hoplias malabaricus, a widely distributed neotropical fish (Central America to Argentina), may represent a group of distinct species showing diversified cytotypes with respect to chromosome number, morphology and sex systems. One of these karyotypic forms is characterized by an X1X1X2X2/X1X2Y sex chromosome system, with 2n = 40 and 39 chromosomes in females and males respectively. Analyses with G-, C- and chromosome replication banding permitted a better characterization of the sex chromosomes in this cytotype. The Y chromosome, unique in males, resulted from a translocation event between two biarmed chromosomes: one similar to chromosome 6 (X1) and the other one similar to chromosome 20 (X2), the latter corresponding to a probable identification. On the basis of the observed banding patterns, the Y chromosome may represent a stable dicentric, with an inactive centromere interstitially located on its long arm. The results are also related to a specific satellite DNA subfamily, previously characterized in Hoplias malabaricus, which appears to be associated with the X1 chromosome.

Citations

Sep 9, 2015·TheScientificWorldJournal·Roberto Ferreira ArtoniWagner Franco Molina
Mar 13, 2014·Zebrafish·Renata da RosaLucia Giuliano-Caetano
Sep 27, 2013·Genetica·Francisco Carlos de Souza ValentimEliana Feldberg
Oct 6, 2017·Genes·Marcelo de Bello CioffiLuiz Antônio Carlos Bertollo
Mar 21, 2018·Frontiers in Genetics·Alexandr SemberMarcelo de Bello Cioffi

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