Irreversible thelytokous reproduction in Muscidifurax uniraptor

  title={Irreversible thelytokous reproduction in Muscidifurax uniraptor},
  author={Yuval Gottlieb and Einat Zchori‐Fein},
  journal={Entomologia Experimentalis et Applicata},
Vertically transmitted bacteria of the genus Wolbachia are obligatory endosymbionts known to cause thelytokous (asexual) reproduction in many species of parasitic Hymenoptera. In these species production of males can be induced, but attempts to establish sexual lines have failed in all but one genus. We have found three reproductive barriers between antibiotic‐induced males and conspecific females of Muscidifurax uniraptor Kogan and Legner (Hymenoptera: Pteromalidae): males do not produce… 

Sexual functionality of Leptopilina clavipes (Hymenoptera: Figitidae) after reversing Wolbachia‐induced parthenogenesis

The results indicate that although males show a decay of sexual function, they are still able to fertilize uninfected females and the absence of genomic incompatibilities suggests that these effects are due to the difference in mode of reproduction.

The genetics and evolution of obligate reproductive parasitism in Trichogramma pretiosum infected with parthenogenesis-inducing Wolbachia

Through a series of backcrossing experiments with an uninfected Trichogramma pretiosum population, the genetic basis for the loss of female sexual function could be explained by a dominant nuclear effect and the dynamics of sex ratio selection in PI Wolbachia-infected populations are discussed.

Microorganisms and parthenogenesis

Endosymbionts are being discovered in unprecedented numbers of invertebrate species, and recent studies indicate that Wolbachia might be just one of a rapidly increasing list of intracellular bacteria capable of inducing parthenogenesis in their host.

Reduced sexual functionality of PI‐Wolbachia‐infected females of Tetrastichus coeruleus

Mated females had shorter life spans than virgin females, showing that mating carried a fitness cost, and accumulation of neutral mutations, functional virginity mutations, manipulation by Wolbachia, and/or the genetic distance between the two populations may all have contributed to the decay of sexual traits in thelytokous females.

The Wolbachia Endosymbionts.

The Wolbachia endosymbionts encompass a large group of intracellular bacteria of biomedical and veterinary relevance, closely related to Anaplasma, Ehrlichia, and Rickettsia, which are essential to the survival and reproduction of their filarial nematode hosts and an attractive target to fight filariasis.

Limited Mating Ability of a Wasp Strain with Rickettsia-Induced Thelytoky

It is confirmed that the thelytokous strain has been maintained by a functional apomixis mechanism rather than by occasional sex, preserving a degree of heterozygosity.

Evidence for an one-step mechanism of endosymbiont-induced thelytoky in the parasitoid wasp, Muscidifurax uniraptor

Wolbachia only needs to induce diploidization and that bi-allelic Mutra expression is sufficient for female development in sexually reproducing sister species, Muscidifurax raptorellus, and artificially created triploid females to determine whether diploidsization is necessary for feminization.

Genetics of female functional virginity in the Parthenogenesis-Wolbachia infected parasitoid wasp Telenomus nawai (Hymenoptera: Scelionidae)

The genetic basis of the females' inability to reproduce sexually is determined by introgressing the genome of a thelytokous line into an arrhenotokous Line by suggesting that the mutations are recessive and inherited either as a single-locus major gene with some modifiers, or as two partially linked loci.

Patterns and mechanisms in instances of endosymbiont‐induced parthenogenesis

The literature survey indicates that endosymbiont‐induced parthenogenesis is known or suspected in 124 host species from seven different arthropod taxa and suggests specific approaches that allow for firm conclusions about the involvement of endosYmbionts in the origin of parthenogenic.

Intragenomic conflict in populations infected by Parthenogenesis Inducing Wolbachia ends with irreversible loss of sexual reproduction

This study shows that dependence among organisms can evolve rapidly due to the resolution of the conflicts between cytoplasmic and nuclear genes, and without requiring a mutualism between the partners.



Wolbachia‐induced parthenogenesis in the egg parasitoid Telenomus nawai

The facts suggest that Wolbachia causes thelytoky and Telenomus spec.

Parthenogenesis‐inducing microorganisms in Aphytis (Hymenoptera: Aphelinidae)

Production of males in uniparental lines of two species in the parasitic wasp genus Aphytis was induced by rifampicin, and male sexual functioning was determined, and sperm failure to effect egg fertilization resulted in all‐male progeny.

Wolbachia pipientis: microbial manipulator of arthropod reproduction.

The alpha-proteobacterium Wolbachia pipientis is a very common cytoplasmic symbiont of insects, crustaceans, mites, and filarial nematodes that has evolved a large scale of host manipulations: parthenogenesis induction, feminization, and male killing.

Cytoplasmic incompatibility and bacterial density in Nasonia vitripennis.

Experiments show that bacterial density is correlated with compatibility differences between male and female Nasonia, and this result is consistent with a critical "imprinting" period during egg maturation, when cytoplasmic bacteria determine compatibility.

Male–killing Wolbachia in two species of insect

Observations reinforce the notion that Wolbachia may be an important agent driving arthropod evolution, and corroborates previous suggestions that male–killing behaviour is easily evolved by invertebrate symbionts.

Asexuality cured: the relations and differences between sexual and asexual Apoanagyrus diversicornis

A sexual A. diversicornis strain was introduced into Africa for the biological control of the cassava mealybug Phenacoccus manihoti and was intermediate between the survival probabilities of the parental strains.

Sperm Transfer and Utilization by the Arrhenotokous Wasp Dahlbominus fuscipennis (Zett.) (Hymenoptera: Eulophidae)

  • A. Wilkes
  • Biology
    The Canadian Entomologist
  • 1965
The sperm storage organ and glands in the oviducts are more precisely defined and an account given of a structure which regulates the number of sperm entering the sperm bundle prior to its transfer to the female.

Antibiotics cause parthenogenetic Trichogramma (Hymenoptera/Trichogrammatidae) to revert to sex.

Completely parthenogenetic Trichogramma wasps can be rendered permanently bisexual by treatment with three different antibiotics or high temperatures. The evidence strongly suggests that maternally

Molecular identification of microorganisms associated with parthenogenesis

It is concluded that parthenogenesis bacteria and cytoplasmic incompatibility bacteria form a monophyletic group of microorganisms that 'specialize' in manipulating chromosome behaviour and reproduction of insects.

16S rRNA phylogenetic analysis of the bacterial endosymbionts associated with cytoplasmic incompatibility in insects.

Initial screening of insects indicates that cytoplasmic incompatibility may be a more general phenomenon in insects than is currently recognized and Lack of congruence between the phylogeny of the symbionts and their insect hosts suggest that horizontal transfer of symbiont between insect species may occur.