Identification of putative sex chromosomes in the blue tilapia, Oreochromis aureus, through synaptonemal complex and FISH analysis

被引：44

作者：

Campos-Ramos, R

Harvey, SC

Masabanda, JS

Carrasco, LAP

Griffin, DK

McAndrew, BJ

Bromage, NR

Penman, DJ ^{[1
]}

机构：

[1] Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland

[2] Brunel Univ, Dept Biol Sci, Uxbridge UB8 3PH, Middx, England

来源：

GENETICA | 2001年 / 111卷 / 1-3期

基金：

英国生物技术与生命科学研究理事会;

关键词：

blue tilapia; FISH; Oreochromis aureus; sex chromosomes; sex ratio; synaptonemal complex;

D O I：

10.1023/A:1013707818534

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Sex determination in the blue tilapia, Oreochromis aureus, is primarily a ZW female-ZZ male system. Here, by analysis of the pachytene meiotic chromosomes of O. aureus, we demonstrate the presence of two distinct regions of restricted pairing present only in heterogametic fish. The first, a subterminal region of the largest bivalent is located near to the region of unpairing found in the closely related species O. niloticus, while the second is in a small bivalent, most of which was unpaired. These results suggest that O. aureus has two separate pairs of sex chromosomes.

引用

页码：143 / 153

页数：11

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