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.
引用
收藏
页码：55 / 58
页数：4
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