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

页码：55 / 58

页数：4

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