Non-homologous sex chromosomes in two species of the genus Eigenmannia (Teleostei: Gymnotiformes)

被引：41
|
作者：
Henning, F. [1 ]
Trifonov, V. [2 ]
Ferguson-Smith, M. A. [3 ]
de Almeida-Toledo, L. F. [1 ]
机构：
[1] Univ Sao Paulo, Dept Genet & Evolutionary Biol, Sao Paulo, Brazil
[2] Russian Acad Sci, Inst Cytol & Genet, Novosibirsk 630090, Russia
[3] Univ Cambridge, Cambridge Resource Ctr Comparat Genom, Cambridge, England
来源：
CYTOGENETIC AND GENOME RESEARCH | 2008年 / 121卷 / 01期
基金：
英国惠康基金;
关键词：
D O I：
10.1159/000124382
中图分类号：
Q2 [细胞生物学];
学科分类号：
071009 ; 090102 ;
摘要：
The Neotropical genus Eigenmannia is a fish group with unknown species diversity where representatives possess a broad range of chromosomal sex determining systems namely XY/XX, X1X2Y/X1X1X2X2, ZZ/ZW as well as homomorphic sex chromosomes. To test the homology of two heteromorphic XY sex chromosome systems present in two sympatric populations, reciprocal cross-species FISH experiments were performed using probes derived by microdissection of X and Y chromosomes present in analyzed specimens of Eigenmannia virescens and Eigenmannia sp.2, respectively. While X and Y paint probes hybridized to species-specific sex chromosomes, in reciprocal cross-FISH both probes hybridized exclusively to autosomes. The result suggests multiple independent origins of the XY systems in the analyzed populations. Copyright (C) 2008 S. Karger AG, Basel.
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页码：55 / 58
页数：4
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