Results 81 to 90 of about 418 (153)

Genetic diversity in populations of asexual and sexual bag worm moths (Lepidoptera: Psychidae)

open access: yesBMC Ecology, 2005
Background Despite the two-fold cost of sex, most of the higher animals reproduce sexually. The advantage of sex has been suggested to be its ability, through recombination, to generate greater genetic diversity than asexuality, thus enhancing adaptation
Mappes Johanna   +3 more
doaj   +1 more source

Wolbachia Infections Responsible for Thelytoky in Dryinid Wasps. The Case of Gonatopus bonaerensis Virla (Hymenoptera: Dryinidae)

open access: yesNeotropical Entomology, 2016
We studied the occurrence of Wolbachia in the parasitoid Gonatopus bonaerensis Virla (Hymenoptera: Dryinidae). In order to verify the existence of natural infections in the parasitoid, a field survey was conducted. Identification of Wolbachia was performed on the basis of 16S rDNA, wsp_F1, and wsp_R1-sequences.
Espinosa, M. S.   +2 more
openaire   +3 more sources

Sexual versus Asexual Reproduction: Distinct Outcomes in Relative Abundance of Parthenogenetic Mealybugs following Recent Colonization.

open access: yesPLoS ONE, 2016
Asexual reproduction, including parthenogenesis in which embryos develop within a female without fertilization, is assumed to confer advantages over sexual reproduction, which includes a "cost of males." Sexual reproduction largely predominates in ...
Jun Tabata   +3 more
doaj   +1 more source

Facultative parthenogenesis in the burrowing mayfly, Ephoron eophilum (Ephemeroptera: Polymitarcyidae) with an extremely short alate stage

open access: yesEuropean Journal of Entomology, 2015
Facultative parthenogenesis is important for mayflies with short alate stages because females are able to reproduce without mating. We studied facultative parthenogenesis in Ephoron eophilum, a mayfly with an extremely short alate stage.
Kazuki SEKINÉ, Koji TOJO, Yeon Jae BAE
doaj   +1 more source

Wolbachia-Associated Thelytoky in Diaphorencyrtus aligarhensis (Hymenoptera: Encyrtidae), A Parasitoid of the Asian Citrus Psyllid

open access: yesFlorida Entomologist, 2007
Wolbachia is an obligate intracellular ct-pro teobacterium associated with arthropods and nematodes (O'Neill et al. 1997; Bazzochi et al. 2000). Wolbachia is transovarially transmitted by females to their progeny, and infections often are associated with reproductive anomalies in their host (O'Neill et al. 1997).
Jason M. Meyer, Marjorie A. Hoy
openaire   +1 more source

Phylogeny and host-symbiont interactions of thelytoky inducing Wolbachia in Hymenoptera

open access: yes
Summary and conclusionsBacteria of the genus Wolbachia (α-Proteobacteria, Rickettsia) are widespread in arthropods and can induce thelytoky (T) in parasitoids (Hymenoptera). Infection with thelytoky inducing Wolbachia (T- Wolbachia ) enables infected females to produce daughters from unfertilised eggs.
openaire   +1 more source

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