Absence of complementary sex determination in two Leptopilina species (Figitidae, Hymenoptera) and a reconsideration of its incompatibility with endosymbiont-induced thelytoky.
Wolbachia bacteria
arrhenotoky
haplodiploidy
inbreeding
sex determination
thelytoky
Journal
Insect science
ISSN: 1744-7917
Titre abrégé: Insect Sci
Pays: Australia
ID NLM: 101266965
Informations de publication
Date de publication:
Jun 2022
Jun 2022
Historique:
revised:
01
09
2021
received:
09
07
2021
accepted:
02
09
2021
pubmed:
16
9
2021
medline:
24
5
2022
entrez:
15
9
2021
Statut:
ppublish
Résumé
Complementary sex determination (CSD) is a widespread sex determination mechanism in haplodiploid Hymenoptera. Under CSD, sex is determined by the allelic state of one or multiple CSD loci. Heterozygosity at one or more loci leads to female development, whereas hemizygosity of haploid eggs and homozygosity of diploid eggs results in male development. Sexual (arrhenotokous) reproduction normally yields haploid male and diploid female offspring. Under asexual reproduction (thelytoky), diploidized unfertilized eggs develop into females. Thelytoky is often induced by bacterial endosymbionts that achieve egg diploidization by gamete duplication. As gamete duplication leads to complete homozygosity, endosymbiont-induced thelytokous reproduction is presumed to be incompatible with CSD, which relies on heterozygosity for female development. Previously, we excluded CSD in four Asobara (Braconidae) species and proposed a two-step mechanism for Wolbachia-induced thelytoky in Asobara japonica. Here, we conclusively reject CSD in two cynipid wasp species, Leptopilina heterotoma and Leptopilina clavipes. We further show that thelytoky in L. clavipes depends on Wolbachia titer but that diploidization and feminization steps cannot be separated, unlike in A. japonica. We discuss what these results reveal about the sex determination mechanism of L. clavipes and the presumed incompatibility between CSD and endosymbiont-induced thelytoky in the Hymenoptera.
Identifiants
pubmed: 34525260
doi: 10.1111/1744-7917.12969
pmc: PMC9297927
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
900-914Subventions
Organisme : Netherlands Organisation for Scientific Research (NWO)
ID : 824.15.015
Organisme : China Scholarship Council
ID : 201506300038
Informations de copyright
© 2021 The Authors. Insect Science published by John Wiley & Sons Australia, Ltd on behalf of Institute of Zoology, Chinese Academy of Sciences.
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