Mapping of Multiple Complementary Sex Determination Loci in a Parasitoid Wasp.

Details

Serval ID
serval:BIB_5B8CC4462D88
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Mapping of Multiple Complementary Sex Determination Loci in a Parasitoid Wasp.
Journal
Genome biology and evolution
Author(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
Publication state
Published
Issued date
01/10/2019
Peer-reviewed
Oui
Volume
11
Number
10
Pages
2954-2962
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
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 multilocus CSD in the parasitoid wasp Lysiphlebus fabarum using restriction-site associated DNA sequencing. By analyzing 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 multilocus 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.
Keywords
Animals, Bees/genetics, Centromere, Diploidy, Female, Genetic Loci, Male, Sequence Analysis, DNA, Sex Determination Processes, Wasps/genetics, Lysiphlebus fabarum, CSD, hymenoptera, sex determination
Pubmed
Web of science
Open Access
Yes
Create date
10/10/2019 21:48
Last modification date
03/04/2020 6:19
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