Reproductive Performance of Bracon hebetor1 Females with More or Fewer than the Normal Number of Ovarioles2

Petters, Robert M.; Grosch, Daniel S.

doi:10.1093/aesa/70.4.577

Cited by 12 publications

(10 citation statements)

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“…Selection for an on average higher number of ovarioles has been accomplished in D. melanogaster within ten generations (ROBERTSON 1957a). O n the other hand, PETTERS and GROSCH (1977) were not able to select for supernumerary ovarioles in Bracon hebetor during four generations. E. formosu differs from both organisms since it is parthenogenetic.…”

Section: Conclusion and Discussionmentioning

confidence: 96%

The parasite‐host relationship between Encarsia formosa Gahan (Hym., Aphelinidae) and Trialeurodes vaporariorum (Westwood) (Horn., Aleyrodidae)

Vianen¹,

Lenteren²

1986

J Applied Entomology

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With the aim of improving Encarsia formosa for biological control of the greenhouse whitefly, Trialeurodes vaporariorum, intraspecific variation in the number of ovarioles of E. formosa was examined. The number of ovarioles varied between five and sixteen. The average number of ovarioles varied between eight and ten in different populations collected. The number of ovarioles is mainly influenced by environmental circumstances. Heritability appeared to be zero. It was not possible to select for a strain with an on average higher number of ovarioles than the parent population within three generations. Large individuals have absolutely more, however relatively less ovarioles than small ones. Large parasites have a shorter developmental time than their smaller sisters. Reared on a large host‐species, Aleyrodes proletella, parasites become larger compared with parasites reared on the smaller host T. vaporariorum. Zusammenfassung Die Parasit‐Wirt‐Beziehungen zwischen Encarsia formosa Gahan (Hym., Aphelmidae) und Trialeurodes vaporariorum (Westw.) (Horn., Aleyrodidae). XIV. Die Körpergröße und Zahl der Ovariolen von E. formosa beeinflussende genetische und Umweltfaktoren Zum Zwecke der Optimierung von Encarsia formosa als biologisches Agens gegen Trialeurodes vaporariorum wurde die intraspezifische Variabilität bezüglich der Anzahl der Ovariolen innerhalb E. formosa untersucht. Die totale Zahl der Ovariolen schwankte zwischen 5 und 16 (durchschnittlich 8 bis 10 in verschiedenen Populationen). Die Zahl erwies sich als vorwiegend abhängig von Umweltfaktoren und nicht von Erbfaktoren. Es gelang nicht innerhalb 3 Generationen eine Selektion zur Steigerung der Ovariolenzahl zu erreichen. Größere Parasiten haben absolut mehr, aber relativ weniger Ovariolen und zugleich eine kürzere Entwicklung als kleinere Tiere. Encarsia aus Zuchten im größeren Wirt Aleyrodes proletella waren größer als jene vom Standard‐Wirt T. vaporariorum.

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Section: Conclusion and Discussionmentioning

confidence: 96%

The parasite‐host relationship between Encarsia formosa Gahan (Hym., Aphelinidae) and Trialeurodes vaporariorum (Westwood) (Horn., Aleyrodidae)

Vianen¹,

Lenteren²

1986

J Applied Entomology

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“…The variation in ovariole number can have implications in progeny development, such as the production of different-sized eggs or it may affect female reproductive capacity (Price 1973, Wellings et al 1980, Tschinkel 1987, Stewart et al 1991. In Habrobracon hebetor (Say), the nutrients to be used in the composition of the vitellum of the parasitoid acted as a limiting factor in the development of extra oocytes in females with a larger number of ovarioles (Petters & Grosch 1977).…”

Section: Discussionmentioning

confidence: 99%

Ovary Development and Maturation in Nezara viridula (L.) (Hemiptera: Pentatomidae)

Fortes¹,

Salvador²,

Cônsoli³

2011

Neotrop. entomol.

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Ovary development and maturation of Nezara viridula (L.) were evaluated by examining ovariole morphology and the alterations in the biochemical (protein synthesis related to reproduction) composition of the hemolymph. Quantitative and qualitative protein analyses were performed and ovary structural alterations for the pre-reproductive and reproductive stages were recorded. Total concentration of proteins in female hemolymph gradually increased until the end of the pre-mating stage, remaining unaltered thereafter. Proteins linked to reproduction (vitellogenins) appeared in the hemolymph 10 days after adult emergence and indicated the end of the pre-mating stage. After mating, total protein concentration in the hemolymph was lower compared to virgin females; vitellogenin levels were similar during most of the observation period. Oocyte development and maturation were gradual and age dependent. Ten-day-old females had chorionated oocytes ready for fertilization. Mating did not stimulate oocyte development in N. viridula, but the lack of mating activity appeared to have stimulated oocyte resorption in 17-day-old females.

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“…When under stress, either nutrients are reallocated to sustain vital functions before egg formation, or already produced eggs are re-sorbed (Carbone et al, 2008), which reduces the reproductive potential of females (Bourdais et al, 2012). However, Petters & Grosch (1977) report a rather different process: in the parasitoid Bracon hebetor Say (Hymenoptera: Braconidae) storage at a low temperature results in the production of supernumerary ovarioles and an increase in the reproductive potential of this parasitoid. Ismail et al (2010) found that male Aphidius ervi Haliday (Hymenoptera: Braconidae) parasitoids are more sensitive to cold storage than females, which indicates that cold affects the quality of sperm.…”

mentioning

confidence: 99%

Cold storage affects mortality, body mass, lifespan, reproduction and flight capacity of Praon volucre (Hymenoptera: Braconidae)

Lins¹,

Bueno²,

Sidney³

et al. 2013

Eur. J. Entomol.

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Reproductive Performance of Bracon hebetor1 Females with More or Fewer than the Normal Number of Ovarioles2

Cited by 12 publications

References 0 publications

The parasite‐host relationship between Encarsia formosa Gahan (Hym., Aphelinidae) and Trialeurodes vaporariorum (Westwood) (Horn., Aleyrodidae)

The parasite‐host relationship between Encarsia formosa Gahan (Hym., Aphelinidae) and Trialeurodes vaporariorum (Westwood) (Horn., Aleyrodidae)

Ovary Development and Maturation in Nezara viridula (L.) (Hemiptera: Pentatomidae)

Cold storage affects mortality, body mass, lifespan, reproduction and flight capacity of Praon volucre (Hymenoptera: Braconidae)

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