[Coral-List] article genetic sex determination in red coral

AURELLE Didier didier.aurelle at univ-amu.fr
Fri Mar 10 07:03:43 EST 2017

Dear all

here is our new article on the genetic sex determination in the Mediterranean red coral Corallium rubrum,


Best regards



Sexual reproduction is widespread among eukaryotes, and the sex-determining processes vary greatly among species. While genetic sex determination (GSD) has been intensively described in bilaterian species, no example has yet been recorded among non-bilaterians. However, the quasi-ubiquitous repartition of GSD among multicellular species suggests that similar evolutionary forces can promote this system, and that these forces could occur also in non-bilaterians. Studying sex determination across the range of Metazoan diversity is indeed important to understand better the evolution of this mechanism and its lability. We tested the existence of sex-linked genes in the gonochoric red coral (Corallium rubrum, Cnidaria) using restriction site-associated DNA sequencing. We analysed 27?461 single nucleotide polymorphisms (SNPs) in 354 individuals from 12 populations including 53 that were morphologically sexed. We found a strong association between the allele frequencies of 472 SNPs and the sex of individuals, suggesting an XX/XY sex-determination system. This result was confirmed by the identification of 435 male-specific loci. An independent test confirmed that the amplification of these loci enabled us to identify males with absolute certainty. This is the first demonstration of a GSD system among non-bilaterian species and a new example of its convergence in multicellular eukaryotes.


Courriel: didier.aurelle at univ-amu.fr<mailto:didier.aurelle at univ-amu.fr>

Maître de Conférences
UMR 7263 IMBE (Institut Méditerranéen de Biodiversité et d'Ecologie marine et continentale)<http://www.imbe.fr/>
Aix-Marseille Université / Institut Pythéas
Station Marine d'Endoume
Chemin de la batterie des Lions
13007 Marseille FRANCE
Tel: + 33 4 91 04 16 18 / Fax: + 33 4 91 04 16 35


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