Genetics of sex determination in tilapiine species

Cnaani, Avner; Lee, Bo-Young; Zilberman, Noam; Ozouf-Costaz, Catherine; Hulata, Gideon; Ron, Micha; D’Hont, Angelique; Baroiller, Jean-Francois; D’Cotta, Helena; Penman, David; Tomasino, Elizabeth; Coutanceau, Jean-Pierre; Pepey, Elodie; Shirak, Andrey; Kocher, Thomas D; Virginia Polytechnic Institute And State University; University of Maryland; Agricultural Research Organization; Museum National d’Histoire Naturelle; Agricultural Research Organization; Agricultural Research Organization; CIRAD; CIRAD; CIRAD; Institute of Aquaculture; Cornell University; Museum National d’Histoire Naturelle; CIRAD; Agricultural Research Organization; University of Maryland; 0000-0001-8608-6631

Genetics of sex determination in tilapiine species

2007

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.

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Mots clés AGROVOC

cichlidae oreochromis sex determination tilapia

Informations bibliographiques

Editeur

Karger

D'autres materias

Recombination suppression; Tilapia genetics; Heterogametic sex; Sex chromosomes genetics; Sex chromosome; Inversion; Genetic

Langue

anglais

Format

application/pdf

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The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author; you can only request a copy if you wish to use this work for your own research or private study., http://www.rioxx.net/licenses/under-embargo-all-rights-reserved, 2999-12-31, [Cnaani et al 2008 Sex Dev sex det in tilapias.pdf] I do not have the final authors' version of this article. The document submitted is the final journal article, and the embargo should be permanent for copyright reasons. Anyone wanting a copy can request it from me. The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.

ISBN

0002551756000, 0-423491173

ISSN

18418034

Type

Journal Article; Journal Part

Sur AGRIS depuis: 2024-11-28

Date de modification: 2026-02-03

Format: Dublin Core

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Cette notice bibliographique a été fournie par University of Stirling

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DOI http://hdl.handle.net/1893/1148 http://dspace.stir.ac.uk/bitstream/1893/1148/1/Cnaani%20et%20al%202008%20Sex%20Dev%20sex%20det%20in%20tilapias.pdf

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Genetics of sex determination in tilapiine species

2007

Mots clés AGROVOC

Informations bibliographiques