Genetics of sex determination in tilapiine species

被引：167

作者：

Cnaani, A. ^{[2
]}

Lee, B. -Y. ^{[1
]}

Zilberman, N. ^{[3
]}

Ozouf-Costaz, C. ^{[4
]}

Hulata, G. ^{[3
]}

Ron, M. ^{[3
]}

D'Hont, A. ^{[5
]}

Baroiller, J. -F. ^{[5
]}

D'Cotta, H. ^{[5
]}

Penman, D. J. ^{[6
]}

Tomasino, E. ^{[7
]}

Coutanceau, J. -P. ^{[4
]}

Pepey, E. ^{[5
]}

Shirak, A. ^{[3
]}

Kocher, T. D. ^{[1
]}

机构：

[1] Univ Maryland, Dept Biol, College Pk, MD 20742 USA

[2] Virginia Polytech Inst & State Univ, Dept Fisheries & Wildlife Sci, Blacksburg, VA 24061 USA

[3] Agr Res Org, Volcani Ctr, Inst Anim Sci, IL-50250 Bet Dagan, Israel

[4] Museum Natl Hist Nat, Dept Systemat & Evolut, F-75231 Paris, France

[5] CIRAD Persyst, Aquaculture & Gest Resources Aquat, Montpellier, France

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

[7] Cornell Univ, Dept Food Sci & Technol, Ithaca, NY USA

来源：

SEXUAL DEVELOPMENT | 2008年 / 2卷 / 01期

关键词：

cichlidae; heterogametic sex; inversion; oreochromis; recombination suppression; sex chromosome; sex determination; tilapia;

D O I：

10.1159/000117718

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We identified DNA markers linked to sex determining genes in six closely related species of tilapiine fishes. The mode of sex determination differed among species. In Oreochromis karongae and Tilapia mariae the sex-determining locus is on linkage group (LG) 3 and the female is heterogametic ( WZ-ZZ system). In O. niloticus and T. zillii the sex-determining locus is on LG1 and the male is heterogametic ( XX- XY system). A more complex pattern was observed in O. aureus and O. mossambicus, in which markers on both LG1 and LG3 were associated with sex. We found evidence for sex-linked lethal effects on LG1, as well as interactions between loci in the two linkage groups. Comparison of genetic and physical maps demonstrated a broad region of recombination suppression harboring the sex-determining locus on LG3. Sex-specific recombination suppression was found in the female heterogametic sex. Sequence analysis showed the accumulation of repetitive elements in this region. Phylogenetic analysis suggests that at least two transitions in the mode of sex determination have occurred in this clade. This variation in sex determination mechanisms among closely related species makes tilapias an excellent model system for studying the evolution of sex chromosomes in vertebrates. Copyright (c) 2008 S. Karger AG, Basel

引用

页码：43 / 54

页数：12

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