Mapping of multiple complementary sex determination loci in a parasitoid wasp.

Détails

ID Serval
serval:BIB_5B8CC4462D88
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Mapping of multiple complementary sex determination loci in a parasitoid wasp.
Périodique
Genome biology and evolution
Auteur(s)
Matthey-Doret C., van der Kooi C.J., Jeffries D.L., Bast J., Dennis A.B., Vorburger C., Schwander T.
ISSN
1759-6653 (Electronic)
ISSN-L
1759-6653
Statut éditorial
In Press
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Résumé
Sex determination has evolved in a variety of ways and can depend on environmental and genetic signals. A widespread form of genetic sex determination is haplodiploidy, where unfertilized, haploid eggs develop into males and fertilized diploid eggs into females. One of the molecular mechanisms underlying haplodiploidy in Hymenoptera, the large insect order comprising ants, bees and wasps, is complementary sex determination (CSD). In species with CSD, heterozygosity at one or several loci induces female development. Here, we identify the genomic regions putatively underlying multi-locus CSD in the parasitoid wasp Lysiphlebus fabarum using restriction-site associated DNA sequencing. By analysing segregation patterns at polymorphic sites among 331 diploid males and females, we identify up to four CSD candidate regions, all on different chromosomes. None of the candidate regions feature evidence for homology with the csd gene from the honey bee, the only species in which CSD has been characterized, suggesting that CSD in L. fabarum is regulated via a novel molecular mechanism. Moreover, no homology is shared between the candidate loci, in contrast to the idea that multi-locus CSD should emerge from duplications of an ancestral single-locus system. Taken together, our results suggest that the molecular mechanisms underlying CSD in Hymenoptera are not conserved between species, raising the question as to whether CSD may have evolved multiple times independently in the group.
Pubmed
Open Access
Oui
Création de la notice
10/10/2019 20:48
Dernière modification de la notice
22/10/2019 19:09
Données d'usage