Automictic parthenogenesis in the parasitoid<i>Venturia canescens</i>(Hymenoptera: Ichneumonidae) revisited

Beukeboom, Leo W.; Pijnacker, L. P.

doi:10.1139/g00-061

Cited by 59 publications

(55 citation statements)

References 27 publications

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“…(2) Automixis, where meiotic reduction is compensated, produces diploid gametes by premeitotic doubling, fusion of two of the four meiotic nuclei, or fusion of cleaved nuclei and results in decline of heterozygosity in the offspring, except for the case of premeiotic doubling where offspring is genetically identical to the mother. While apomixis has been observed in several orders of insects, it has only been observed in a few species in Hymenoptera where automixis seems to prevail (Suomalainen et al, 1987;Beukeboom and Pijnacker, 2000).…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic mechanism and genetic consequences of thelytoky in the wasp Trichogramma cacoeciae

2004

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In Hymenoptera, complete parthenogenesis, that is thelytoky, is a common phenomenon where virgin females produce only daughters. Thelytoky is often induced by bacteria of the genus Wolbachia, but can also be genetically determined by the insect itself, as in the genus Trichogramma where both forms exist. In order to compare these two forms of thelytoky, chromosome behaviour analysis in young eggs and genetic analysis of microsatellite markers were carried out in the wasp Trichogramma cacoeciae, where thelytoky is genetically determined. Microscopic studies revealed that during female gamete formation meiotic cells undergo only a single equational division followed by the expulsion of a single polar body. This absence of meiotic recombination and reduction corresponds well with the high levels of heterozygosity observed in females collected from the field and a nonsegregation pattern in the offspring of heterozygous females. We therefore concluded that diploidy in T. cacoeciae is maintained through an apomictic cloning mechanism and that the incidence of thelytoky under genetic control of the wasp differs entirely from the mechanism induced by Wolbachia infection, where thelytoky is restored through gamete duplication.

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Section: Introductionmentioning

confidence: 99%

Cytogenetic mechanism and genetic consequences of thelytoky in the wasp Trichogramma cacoeciae

2004

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“…In V. canescens both arrhenotoky and thelytoky are obligate, while the latter is not caused by Wolbachia bacteria but most likely has a genetical basis (Beukeboom and Pijnacker, 2000). Thelytokous females produce haploid eggs that undergo diploidisation and develop parthenogenetically into females only.…”

Section: Introductionmentioning

confidence: 99%

“…Thelytokous females produce haploid eggs that undergo diploidisation and develop parthenogenetically into females only. Diploidy restoration occurs through abortion of a reduction division and metaphase I restitution (Speicher et al, 1965;Beukeboom and Pijnacker, 2000). The genetic consequences are similar to central fusion automictic parthenogenesis (Suolmalainen et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Gene flow between arrhenotokous and thelytokous populations of Venturia canescens (Hymenoptera)

et al. 2003

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In the solitary parasitoid wasp Venturia canescens both arrhenotokously (sexual) and thelytokously (parthenogenetical) reproducing individuals occur sympatrically. We found in the laboratory that thelytokous wasps are able to mate, receive and use sperm of arrhenotokous males. Using nuclear (amplified fragment length polymorphism, virus-like protein) and mitochondrial (restriction fragment length polymorphism) markers, we show the occurrence of gene flow from the arrhenotokous to the thelytokous mode in the field. Our results reinforce the paradox of sex in this species.

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“…These parasitoids have a wide tolerance about changing in abiotic factors and differences in host distribution and specificity. Additionally, thelytoky strain of this parasitoid may have different biology (Beling, 1932;Gade & Parker, 1997;Jokela et al, 1997;Vrijenhoek, 1999;Beukeboom & Pijnacker, 2000;Barke et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Cold storage possibilities of a larval parasitoid, Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae)

Tunca¹,

NazanYEŞİL²,

Çalişkan³

2014

Turkish Journal of Entomology

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SummaryThe effects of cold storage on the biology of the larval parasitoid Venturia canescens were tested. Storage studies were conducted in two stages, pre-adult and adult stage of the larval parasitoid, Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae). Pre-adult stage of parasitoid was stored in last larval stage of the hosts, Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) and Plodia interpunctella Hübner (Lepidoptera: Pyralidae) at 5, 10, 15°C for 1, 3, 5, 7, and 15 days. Similarly adult parasitoids were stored the same temperatures for honey feeding and non-feeding condition. Storage temperatures, Storage period and host effects on V. canescens development were evaluated. The parasitoid did not develop at 5°C for 5, 7 and 15 day storage period on both hosts. Similarly parasitoid did not develop at 10°C for 15 day storage period on the host P. interpunctella. Decreasing of temperature and increasing of storage time resulted in increasing in the parasitoid development time, but reducing emergence rate. This reduction of emergence rate was higher in P. interpunctella. Longevity and adult dry mass were less affected by low temperature in both hosts., the most suitable temperature for feeding and non-feeding condition on both hosts was found to be at 10°C for the adult. The results suggest that E. kuehniella could be more suitable host for V. canescens. Key words: Venturia canescens; Ephestia kuehniella; Plodia interpunctella; parasitoid, Cold storage ÖzetBu çalışmada parazitoit Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae)'in biyolojisi üzerine soğuk depolamanın etkileri çalışılmıştır. Depolama çalışmaları larva parazitoiti V. canescens'in ergin öncesi ve ergin döneminde gerçekleştirilmiştir. Parazitoitin ergin öncesi dönemi 5, 10, 15°C sıcaklıklarda ve 1, 3, 5, 7, 15 gün konukçuları Ephestia kuehniella Zeller (Lepidoptera: Pyralidae) ve Plodia interpunctella Hübner (Lepidoptera: Pyralidae)'nın son larva dönemi içinde depolanmıştır. Benzer olarak ergin parazitoitler aynı sıcaklık derecelerinde besinli ve besinsiz koşullarda depolanmıştır. Çalışma sonucunda depolama sıcaklığı, depolama süresi ve konukçu farklılığının V. canescens'in gelişimini etkilediği belirlenmiştir. Parazitoitin iki konukçuda da 5°C'de 5, 7 ve 15 gün depolama sürelerinde gelişim göstermediği belirlenmiştir. Benzer olarak parazitoitin konukçu P. interpunctella üzerinde 10°C' de 15 gün depolanmasıyla da gelişim gösteremediği bulunmuştur. Depolama sıcaklığının düşmesi ve depolama süresinin artması parazitoitin gelişme süresini arttırırken, çıkış oranını azaltmıştır. Çıkış oranındaki azalma konukçu P. interpunctella üzerinde daha fazladır. Yaşam süresi ve ergin ağırlığı iki konukçuda da düşük sıcaklıkdan daha az etkilenmiştir. Ergin parazitoiter için hem besinli hem de besinsiz ortamda ve heriki konukçuda en uygun sıcaklık derecesinin 10°C olduğu belirlenmiştir. Sonuçlar, depolama çalışmalarında V. canescens için E. kuehniella'nın daha uygun bir konukçu olduğunu göstermektedir.

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Automictic parthenogenesis in the parasitoidVenturia canescens(Hymenoptera: Ichneumonidae) revisited

Cited by 59 publications

References 27 publications

Cytogenetic mechanism and genetic consequences of thelytoky in the wasp Trichogramma cacoeciae

Cytogenetic mechanism and genetic consequences of thelytoky in the wasp Trichogramma cacoeciae

Gene flow between arrhenotokous and thelytokous populations of Venturia canescens (Hymenoptera)

Cold storage possibilities of a larval parasitoid, Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae)

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