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Journal articles on the topic 'Arrhenotoky'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Sabelis, M. W., and C. J. Nagelkerke. "Evolution of pseudo-arrhenotoky." Experimental & Applied Acarology 4, no. 3 (1988): 301–18. http://dx.doi.org/10.1007/bf01196192.

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2

Borsa, Philippe, and Finn Kjellberg. "Experimental evidence for pseudo-arrhenotoky in Hypothenemus hampei (Coleoptera: Scolytidae)." Heredity 76, no. 2 (1996): 130–35. http://dx.doi.org/10.1038/hdy.1996.20.

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3

Guo, Wei, Meijiao Zhang, Liangguan Lin, Chenxu Zeng, Yuping Zhang, and Xiaofang He. "Bacterial Community Survey of Wolbachia-Infected Parthenogenetic Parasitoid Trichogramma pretiosum (Hymenoptera: Trichogrammatidae) Treated with Antibiotics and High Temperature." International Journal of Molecular Sciences 24, no. 9 (2023): 8448. http://dx.doi.org/10.3390/ijms24098448.

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Wolbachia has been shown to induce thelytokous parthenogenesis in Trichogramma species, which have been widely used as biological control agents around the world. Little is known about the changes of bacterial community after restoring arrhenotokous or bisexual reproduction in the T. pretiosum. Here, we investigate the emergence of males of T. pretiosum through curing experiments (antibiotics and high temperature), crossing experiments, and high-throughput 16S ribosomal RNA sequencing (rRNA-seq). The results of curing experiments showed that both antibiotics and high temperatures could cause t

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4

Entwistle, P. F. "Inbreeding and arrhenotoky in the ambrosia beetle Xyleborus compactus (Eichh.) (Coleoptera: Scolytidae)." Proceedings of the Royal Entomological Society of London. Series A, General Entomology 39, no. 4-6 (2009): 83–88. http://dx.doi.org/10.1111/j.1365-3032.1964.tb00792.x.

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5

Goudie, Frances, and Benjamin P. Oldroyd. "The distribution of thelytoky, arrhenotoky and androgenesis among castes in the eusocial Hymenoptera." Insectes Sociaux 65, no. 1 (2017): 5–16. http://dx.doi.org/10.1007/s00040-017-0597-0.

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6

Belshaw, Robert, and Donald L. J. Quicke. "The cytogenetics of thelytoky in a predominantly asexual parasitoid wasp with covert sex." Genome 46, no. 1 (2003): 170–73. http://dx.doi.org/10.1139/g02-112.

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Asexual lineages in the parasitoid wasp Lysiphlebus fabarum (Hymenoptera: Braconidae: Aphidiinae) have previously been shown to have occasionally undergone sexual reproduction and recombination with males from related sexual populations. In the present study, the cytogenetic system of asexual females in this species is shown by 4',6-diamidino-2-phenylindole dihydrochloride (DAPI) staining to be central fusion automixis. This system has the potential to allow occasional sex and recombination without leading to an elevation of ploidy and with the maintenance of at least some heterozygosity. No e

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7

Zervos, S. "Evidence for population self-regulation, reproductive competition and arrhenotoky in a thelastomatid nematode of cockroaches." Parasitology 96, no. 2 (1988): 369–79. http://dx.doi.org/10.1017/s0031182000058352.

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SummaryExperimental infection of adult Drymaplaneta variegata Shelford, 1909 (Blattodea) with known numbers of eggs of Protrellus dixoni Zervos, 1987 (Nematoda: Thelastomatidae) showed that each infrapopulation was regulated by a density-dependent and sex-dependent reduction in infection intensity with infrapopulation age. This reduction was not equal in initial speed or intensity between the sexes (reduction in number of males was faster) and led to infrapopulations with never more than a single adult male, 1–8 (usually 1–3) adult females and 0–28 juvenile females. In structure, these laborat

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8

Wang, Jian Chao, Bin Zhang, Hong Gang Li, Jun Ping Wang, and Chang Ying Zheng. "Effects of Exposure to High Temperature onFrankliniella occidentalis(Thysanoptera: Thripidae), under Arrhenotoky and Sexual Reproduction Conditions." Florida Entomologist 97, no. 2 (2014): 504–10. http://dx.doi.org/10.1653/024.097.0222.

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9

Barker, Philip S. "Bionomics of Nodele calamondin Muma (Acarina: Cheyletidae) fed on Lepidoglyphus destructor (Schrank) (Acarina: Glycyphagidae) at two constant temperatures." Canadian Journal of Zoology 70, no. 12 (1992): 2333–37. http://dx.doi.org/10.1139/z92-313.

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Nodele calamondin Muma is a predator of other mite species and of small insect larvae. Unmated females produced only male offspring (arrhenotoky), which subsequently mated with their mothers to produce female as well as male offspring. At 29.5 °C these females became adults an average of 47.3 days after the emergence of the mother. Males have one nymphal stage in their development and females have two nymphal stages. Males guarded the quiescent deutonymph females and mating took place as soon as the females emerged as adults. Unmated females lived more than twice as long as mated females and l

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10

TOYOSHIMA, Shingo, and Hiroshi AMANO. "Cytological Evidence of Pseudo-arrhenotoky in Two Phytoseiid Mites, Phytoseiulus persimilis Athias-Henriot and Amblyseius womersleyi Schicha." Journal of the Acarological Society of Japan 8, no. 2 (1999): 135–42. http://dx.doi.org/10.2300/acari.8.135.

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11

Goudie, F., M. H. Allsopp, M. Solignac, M. Beekman, and B. P. Oldroyd. "The frequency of arrhenotoky in the normally thelytokous Apis mellifera capensis worker and the Clone reproductive parasite." Insectes Sociaux 62, no. 3 (2015): 325–33. http://dx.doi.org/10.1007/s00040-015-0401-y.

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12

Toldi, Maicon, Daiâni Cristina Cardoso Faleiro, Guilherme Liberato Da Silva, and Noeli Juarez Ferla. "Life cycle of the predatory mite Cheyletus malaccensis (Acari: Cheyletidae) fed on Poultry Red Mite Dermanyssus gallinae (Acari: Dermanyssidae)." Systematic and Applied Acarology 22, no. 9 (2017): 1422. http://dx.doi.org/10.11158/saa.22.9.9.

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This study evaluated the biological characteristics of predatory mite Cheyletus malaccensis fed on Dermanyssus gallinae at different temperatures. The study started with thirty individual eggs of C. malaccensis each isolated in an experimental unit, which developed throughout their life stages while feeding on D. gallinae at each temperature tested (20ºC, 25ºC and 30±1ºC and 80±5% relative humidity). Emerged adult females were not mated, thus producing only male offspring (arrhenotoky). Fecundity was the highest at 25°C (415.62±24.78 eggs/female) and lowest at 20°C followed at 30ºC. The mean l

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13

Carlos Henrique Marchiori. "Studies of the family Drynidae (Insecta: Hymenoptera) as parasitoids of cicadas (Cicadellidae)." Open Access Research Journal of Biology and Pharmacy 7, no. 1 (2023): 021–37. http://dx.doi.org/10.53022/oarjbp.2023.7.1.0011.

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Most Dryinidae act as cenobiont ectoparasitoids of Cicadellidae (Cicadelloidea), Delphacidae, Flatidae and Membracidae (Hemiptera). Females of Dryinidae feed on nectar and other sugary solutions and, with the exception of Aphelopinae, they also have a predatory habit and feed on fluids and tissues of their hosts. Only Aphelopinae acts as polyembryonic endoparasitoids that attack Membracidae nymphs. Superparasitism is reported for some female Gonatopodinae. Drynidae have biparental reproduction or parthenogenetic thelytok or arrhenotoky. Dryinidae species can be bi or multivoltine, according to

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14

Wang, Chu, Ping-Jui Sung, Chung-Chi Lin, Fuminori Ito, and Johan Billen. "Parthenogenetic Reproduction in Strumigenys Ants: An Update." Insects 14, no. 2 (2023): 195. http://dx.doi.org/10.3390/insects14020195.

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Parthenogenetic reproduction is a common feature for social Hymenoptera, as males typically develop from unfertilized eggs (arrhenotoky). Production of female offspring without the involvement of sperm (thelytoky) also exists but is rather exceptional as it has been reported for only 16 ant species so far. Three of these belong to the genus Strumigenys: S. hexamera, S. membranifera and S. rogeri. Our observations on the reproductive biology in various Oriental Strumigenys species extends this list of thelytokous ants with three more species: S. emmae, S. liukueiensis and S. solifontis. Of thes

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15

Mikát, Michael, and Jakub Straka. "Genetic evidence for parthenogenesis in the small carpenter bee Ceratina dallatoreana (Apidae, Ceratinini) in its native distribution range." Journal of Hymenoptera Research 95 (February 17, 2023): 199–213. http://dx.doi.org/10.3897/jhr.95.87165.

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Arrhenotoky is the typical mode of reproduction in Hymenoptera. Diploid females develop from fertilized eggs, whereas haploid males originate from unfertilized eggs. However, some taxa of Hymenoptera have evolved thelytoky, in which diploid females originate parthenogenetically from unfertilized diploid eggs. In contrast to some other hymenopteran lineages, like ants and parasitic wasps, thelytoky is generally very rare in bees. Here, we evaluated the frequency of thelytoky in the small carpenter bee Ceratina dallatoreana, which was previously assumed to be thelytokous. By comparing genotypes

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16

Mikát, Michael, and Jakub Straka. "Genetic evidence for parthenogenesis in the small carpenter bee Ceratina dallatoreana (Apidae, Ceratinini) in its native distribution range." Journal of Hymenoptera Research 95 (February 17, 2023): 199–213. https://doi.org/10.3897/jhr.95.87165.

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Arrhenotoky is the typical mode of reproduction in Hymenoptera. Diploid females develop from fertilized eggs, whereas haploid males originate from unfertilized eggs. However, some taxa of Hymenoptera have evolved thelytoky, in which diploid females originate parthenogenetically from unfertilized diploid eggs. In contrast to some other hymenopteran lineages, like ants and parasitic wasps, thelytoky is generally very rare in bees. Here, we evaluated the frequency of thelytoky in the small carpenter bee Ceratina dallatoreana, which was previously assumed to be thelytokous. By comparing genotypes

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17

Marshall, Valin G., and Marilyn R. Clayton. "Biology and phenology of Cecidophyopsis psilaspis (Acari: Eriophyidae) on Pacific yew (Taxaceae)." Canadian Entomologist 136, no. 5 (2004): 695–710. http://dx.doi.org/10.4039/n04-009.

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AbstractThe biology and phenology of the yew big bud mite, Cecidophyopsis psilaspis (Nalepa, 1893), were studied on Pacific yew, Taxus brevifolia Nutt., in British Columbia, Canada. The mite showed the typical life cycle of eriophyoids on evergreen hosts, with all stases being present throughout the year. The numbers of C. psilaspis, which colonized both vegetative and reproductive buds, peaked in May to August, with the lowest numbers in March and October and the highest numbers in June. Mite numbers differed among bud types, with averages following the sequence terminal buds = lateral buds &

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18

Du, Sujie, Fuyu Ye, Qijing Wang, et al. "Multiple Data Demonstrate That Bacteria Regulating Reproduction Could Be Not the Cause for the Thelytoky of Diglyphus wani (Hymenoptera: Eulophidae)." Insects 13, no. 1 (2021): 9. http://dx.doi.org/10.3390/insects13010009.

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In Hymenoptera parasitoids, the reproductive mode is arrhenotoky, while a few species reproduce by thelytoky. The thelytoky of Hymenoptera parasitoids is generally genetically determined by the parasitoids themselves or induced by bacteria, including Wolbachia, Cardinium, and Rickettsia. Diglyphus wani (Hymenoptera: Eulophidae), a recently reported thelytokous species is a main parasitoid attacking agromyzid leafminers. To assess whether endosymbionts induce thelytoky in D. wani, we performed universal PCR detection and sequenced the V3-V4 region of 16S ribosomal RNA gene. In addition, bacteri

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19

Perrot-Minnot, Marie-Jeanne, and Maria Navajas. "Biparental inheritance of RAPD markers in males of the pseudo-arrhenotokous mite Typhlodromus pyri." Genome 38, no. 5 (1995): 838–44. http://dx.doi.org/10.1139/g95-110.

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In pseudo-arrhenotokous mites, haploid males develop from fertilized eggs that undergo paternal genome loss (PGL) during early embryogenesis. We present evidence that some of the paternal genome may be retained in males of the predatory mite Typhlodromus pyri Scheuten (Acari: Phytoseiidae). Two reproductively compatible populations were differentiated by two random amplified polymorphic DNA markers and the inheritance pattern in the offspring was analysed. Maternal transmission rates are variable and independent of the sex of the offspring and of the marker. These data suggest a nuclear origin

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20

Tironi, Paulo, Adrian von Treuenfels, and José Roberto Postali Parra. "Biology of Microctonus sp. (Hymenoptera: Braconidae), a parasitoid of Cyrtomon luridus BOH. (Coleoptera: Ccurculionidae)." Scientia Agricola 61, no. 5 (2004): 538–41. http://dx.doi.org/10.1590/s0103-90162004000500012.

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Cyrtomon luridus (Boh.), a native insect of wild Solanaceae, has adapted to the medicinal plant Duboisia sp., introduced from Australia, causing damages up to 100% mortality. Microctonus sp. is the most important natural enemy of C. luridus and its potential for biological control was investigated in this work. This study was carried out in Arapongas, Paraná State, Brazil, from 1994 to 1996. Parasitism of C. luridus by Microctonus sp. was highest from February through June (maximum of 54% in May 1996), when the C. luridus adult population was decreasing. The female sex ratio of Microctonus sp.

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21

Athias-Binche, Françoise. "Signification adaptative des différents types de développements postembryonnaires chez les Gamasides (Acariens: Anactinotriches)." Canadian Journal of Zoology 65, no. 6 (1987): 1299–310. http://dx.doi.org/10.1139/z87-206.

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This review of the adaptive significance of various patterns of postembryonic development in the gamasid mites is restricted to the phenotypic and adaptive aspects of the different developmental patterns. Postembryonic development is redefined as beginning with achievement of embryonic ectoderm differentiation into a sclerified recognizable integument. The various kinds of postembryonic development depend on the ecology of the species and their adaptative strategies, ranging from generalized edaphic forms to more specialized species, either colonizing unpredictable habitats or being parasitic.

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22

FORAY, Vincent, HENRI Helene, Sonia MARTINEZ, Patricia GIBERT, and Emmanuel DESOUHANT. "Occurrence of arrhenotoky and thelytoky in a parasitic wasp Venturia canescens (Hymenoptera: Ichneumonidae): Effect of endosymbionts or existence of two distinct reproductive modes?" European Journal of Entomology 110, no. 1 (2013): 103–7. http://dx.doi.org/10.14411/eje.2013.014.

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23

Haccou, Patsy, and Maria Victoria Schneider. "Modes of Reproduction and the Accumulation of Deleterious Mutations With Multiplicative Fitness Effects." Genetics 166, no. 2 (2004): 1093–104. http://dx.doi.org/10.1093/genetics/166.2.1093.

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Abstract Mutational load depends not only on the number and nature of mutations but also on the reproductive mode. Traditionally, only a few specific reproductive modes are considered in the search of explanations for the maintenance of sex. There are, however, many alternatives. Including these may give radically different conclusions. The theory on deterministic deleterious mutations states that in large populations segregation and recombination may lead to a lower load of deleterious mutations, provided that there are synergistic interactions. Empirical research suggests that effects of del

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24

Gikonyo, M. W., S. Niassy, G. B. Moritz, F. M. Khamis, E. Magiri, and S. Subramanian. "Resolving the taxonomic status of Frankliniella schultzei (Thysanoptera: Thripidae) colour forms in Kenya – a morphological-, biological-, molecular- and ecological-based approach." International Journal of Tropical Insect Science 37, no. 02 (2016): 57–70. http://dx.doi.org/10.1017/s1742758416000126.

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AbstractFrankliniella schultzeiTrybom is a polyphagous pest and vector of tospoviruses worldwide. It occurs in dark and pale colour forms that are morphologically similar but differ in vector competency and geographic spread. In Kenya and other tropical regions, mixed populations of both colour forms are observed in similar habitats, so are considered as one species. To ascertain the taxonomic status of the two colour forms, they were characterized using morphological, molecular, biological and ecological approaches. Morphological characterization revealed differences between the colour forms

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25

Navajas, Maria, Jean Gutierrez, Jacques Lagnel, and Pierre Boursot. "Mitochondrial cytochrome oxidase I in tetranychid mites: a comparison between molecular phylogeny and changes of morphological and life history traits." Bulletin of Entomological Research 86, no. 4 (1996): 407–17. http://dx.doi.org/10.1017/s0007485300034994.

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AbstractSpider mites, Tetranychidae, represent one of the most cosmopolitan and economically important groups of terrestrial arthropods; however, many aspects of their evolutionary relationships remain uncertain. We sequenced part of the mitochondrial cytochrome oxidase subunit I (COI) gene in 20 species of phytophagous mites belonging to nine genera and two families (Tetranychidae and Tenuipalpidae), including several agricultural pests. As eported in insects, the sequences were extremely rich in A + T (75% on average), especially in the third codon position (95%). However, one of the genera

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Hoddle, M. S. "Developmental and reproductive biology of Scirtothrips perseae (Thysanoptera: Thripidae): a new avocado pest in California." Bulletin of Entomological Research 92, no. 4 (2002): 279–85. http://dx.doi.org/10.1079/ber2002169.

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AbstractThe developmental and reproductive biology of a new avocado pest, Scirtothrips perseae Nakahara, was determined in the laboratory at five constant temperatures, 15, 20, 25, 27.5 and 30°C. At 20°C, S. perseae exhibited greatest larval to adult survivorship (41%), and mated females produced a greater proportion of female offspring at this temperature when compared to 15, 25, 27.5 and 30°C. Average lifetime fecundity and preoviposition period was greatest at 15°C at 39.6 eggs per female and 17.6 days, respectively. Jackknifed estimates of net reproduction (Ro), capacity for increase (rc),

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27

Premachandra, W. T. S. D., C. Borgemeister, A. Chabi-Olaye, and H. M. Poehling. "Influence of temperature on the development, reproduction and longevity of Ceratothripoides claratris (Thysanoptera: Thripidae) on tomatoes." Bulletin of Entomological Research 94, no. 4 (2004): 377–84. http://dx.doi.org/10.1079/ber2004311.

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AbstractCeratothripoides claratris (Shumsher) is a serious pest attacking tomatoes in Thailand. Temperature-dependent development of C. claratris was studied at seven constant temperatures, i.e. 22, 25, 27, 30, 34, 35 and 40°C. Pre-adult survivorship was greatest (95%) at 25 and 30°C and shortest at 22°C. Egg-to-adult time decreased within the range of 20 to 30°C and at 34°C it started to increase. The lower thermal threshold for egg-to-adult development was estimated at 16 and 18°C by linear regression and the modified Logan model, respectively. The optimum temperature for egg-to-adult develo

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28

Yokogawa, Tadashi, and Tetsukazu Yahara. "Mitochondrial phylogeny certified PGL (Paternal Genome Loss) is of single origin and haplodiploidy sensu stricto (arrhenotoky) did not evolve from PGL in the scale insects (Hemiptera: Coccoidea)." Genes & Genetic Systems 84, no. 1 (2009): 57–66. http://dx.doi.org/10.1266/ggs.84.57.

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29

Farahi, Sara, Parviz Shishehbor, and Alireza Nemati. "Bisexual and oedipal reproduction of Macrocheles muscaedomesticae (Acari, Macrochelidae) feeding on Musca domestica (Diptera, Muscidae) eggs." Acarologia 58, no. 2 (2018): 430–41. http://dx.doi.org/10.24349/acarologia/20184251.

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Macrocheles muscaedomesticae (Scopoli) is a predatory mesostigmatic mite that inhabits different manure microhabitats and preys mostly on housefly (Musca domestica L.) eggs. When a virgin female colonizes a new manure substrate, it produces male offspring through parthenogenesis (arrhenotoky); when her sons reach maturity, oedipal mating takes place and the female begins to produce bisexual offspring. In order to examine the consequence of oedipal reproduction on population development, we designed two separate experiments to compare life history traits and life table parameters of oedipal ver

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30

Porta, Bettina, Ben Vosman, Pablo González Barrios, Richard G. F. Visser, Guillermo A. Galván, and Olga E. Scholten. "Thrips dynamics in Allium crops: Unraveling the role of reproductive mode and weather variables in Thrips tabaci population development." PLOS ONE 20, no. 1 (2025): e0314019. https://doi.org/10.1371/journal.pone.0314019.

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Thrips tabaci is the main thrips species affecting onion and related species. It is a cryptic species complex comprising three phylogenetic groups characterized by different reproductive modes (thelytoky or arrhenotoky) and host plant specialization. Thrips tabaci populations vary widely in genetic diversity, raising questions about the factor(s) that drive this diversity. We investigated the genetic diversity, reproductive mode, and heteroplasmy frequency in T. tabaci populations from different Allium spp fields in six locations in the Netherlands in 2021 and at two locations from the North a

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31

Du, Su-Jie, Zoya Yefremova, Fu-Yu Ye, Chao-Dong Zhu, Jian-Yang Guo, and Wan-Xue Liu. "Morphological and molecular identification of arrhenotokous strain of Diglyphus wani (Hymenoptera, Eulophidae) found in China as a control agent against agromyzid leafminers." ZooKeys 1071 (November 17, 2021): 109–26. https://doi.org/10.3897/zookeys.1071.72433.

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Diglyphus species are ecologically and economically important on agromyzid leafminers. In 2018, a thelytokous species, Diglyphus wani Liu, Zhu & Yefremova, was firstly reported and described. Subsequently, the arrhenotokous D. wani were discovered in Yunnan and Guizhou Provinces of China. We compared the morphological characteristics of thelytokous and arrhenotokous strains. However, the females of two strains had a strongly similar morphology and showed subtle differences in fore- and hind-wings. The difference was that forewing of arrhenotokous female was with denser setae overall, showi

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Gokhman, Vladimir E., and Magdalene Westendorff. "Chromosomes of Aphidius ervi Haliday, 1834 (Hymenoptera: Braconidae)." Beiträge zur Entomologie = Contributions to Entomology 53, no. 1 (2003): 161–65. http://dx.doi.org/10.21248/contrib.entomol.53.1.161-165.

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Die Chromosomenanalyse einiger Laborlinien von Aphidius ervi Haliday, 1834 aus Deutschland ergab n=5 und 2n=10. Allerdings wurden bei einigen weiblichen Tieren einer Population Chromosomensätze mit 2n=12 gefunden. Diese Tiere repräsentieren wahrscheinlich eine thelythoke Linie, die aus einer ursprünglich arrhenotoken Population hervorging. Der Karyotyp mit 2n=12 enthält ein zusätzliches charakteristisches Paar vollständig heterochromatischer akrozentrischer Chromosomen.StichwörterChromosomes, Aphidius ervi, Hymenoptera, Braconidae.

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Gokhman, Vladimir E., and Matvey I. Nikelshparg. "Eupelmus messene Walker, 1839 and E. microzonus Förster, 1860 as parasitoids of Aulacidea hieracii (Bouché, 1834) (Hymenoptera, Eupelmidae, Cynipidae)." Journal of Hymenoptera Research 84 (August 24, 2021): 87–102. https://doi.org/10.3897/jhr.84.68556.

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In the southeast of European Russia, the gall wasp Aulacidea hieracii (Bouché, 1834) is attacked by ten parasitoid species, including Eupelmus (Eupelmus) microzonus Förster, 1860 and E. (Macroneura) messene Walker, 1839. Although both members of the genus Eupelmus Dalman, 1820 are idiobiont ectoparasitoids, they demonstrate different life-history strategies in respect to many bionomic features. Specifically, E. messene is represented by brachypterous thelytokous females which lay single eggs directly onto the host body. This species can parasitize both concealed and exposed larvae and pupae of

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34

McCulloch, John B., and Jeb P. Owen. "Arrhenotoky and oedipal mating in the northern fowl mite (Ornithonyssus sylviarum) (Acari: Gamasida: Macronyssidae)." Parasites & Vectors 5, no. 1 (2012). http://dx.doi.org/10.1186/1756-3305-5-281.

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35

Sethuraman, Arun, Alicia Tovar, Walker Welch, et al. "Genome of the parasitoid wasp Dinocampus coccinellae reveals extensive duplications, accelerated evolution, and independent origins of thelytokous parthenogeny and solitary behavior." G3 Genes|Genomes|Genetics 12, no. 3 (2022). http://dx.doi.org/10.1093/g3journal/jkac001.

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Abstract Dinocampus coccinellae (Hymenoptera: Braconidae) is a generalist parasitoid wasp that parasitizes &gt;50 species of predatory lady beetles (Coleoptera: Coccinellidae), with thelytokous parthenogeny as its primary mode of reproduction. Here, we present the first high-quality genome of D. coccinellae using a combination of short- and long-read sequencing technologies, followed by assembly and scaffolding of chromosomal segments using Chicago + HiC technologies. We also present a first-pass ab initio and a reference-based genome annotation and resolve timings of divergence and evolut

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Mozhaitseva, Ksenia, Zoé Tourrain, and Antoine Branca. "Population genomics of the mostly thelytokous Diplolepis rosae (Linnaeus, 1758) (Hymenoptera: Cynipidae) reveals population-specific selection for sex." Genome Biology and Evolution, October 13, 2023. http://dx.doi.org/10.1093/gbe/evad185.

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Abstract In Hymenoptera, arrhenotokous parthenogenesis (arrhenotoky) is a common reproductive mode. Thelytokous parthenogenesis (thelytoky), when virgin females produce only females, is less common and is found in several taxa. In our study, we assessed the efficacy of recombination and the effect of thelytoky on the genome structure of Diplolepis rosae, a gall wasp producing bedeguars in dog roses. We assembled a high-quality reference genome using Oxford Nanopore long-read technology and sequenced 17 samples collected in France with high-coverage Illumina reads. We found two D. rosae peripat

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Jouraku, Akiya, Yui Tomizawa, Kazuki Watanabe, et al. "Evolutionary origin and distribution of amino acid mutations associated with resistance to sodium channel modulators in onion thrips, Thrips tabaci." Scientific Reports 14, no. 1 (2024). http://dx.doi.org/10.1038/s41598-024-54443-9.

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AbstractIn onion thrips Thrips tabaci, reduced sensitivity of the sodium channel caused by several sodium channel mutations have been correlated with pyrethroid resistance. For this study, using mitochondrial cytochrome c oxidase subunit I gene sequences, we examined the phylogenetic relation among a total of 52 thelytokous and arrhenotokous strains with different genotypes of the sodium channel mutations. Then, we used flow cytometry to estimate their ploidy. Results showed that the strains are divisible into three groups: diploid thelytoky, triploid thelytoky, and diploid arrhenotoky. Using

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Rama, Angelee Fame B., and Flor A. Ceballo. "Effect of Food Availability on Egg Load, Longevity, and Progeny Production of Trichogramma evanescens Westwood (Hymenoptera:Trichogrammatidae), Egg Parasitoid of Corn Borer." Philippine Entomologist - Volume 25 Issue 1 25, no. 1 (2011). https://doi.org/10.59852/tpe-a588v25i1.

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The sexuality, mode of reproduction as well as adult survival, lifetime productivity and ovipositional activity patterns of Trichogramma evanescens Westwood were studied with and without access to food. Assessments were made from individual wasps exposed to various food sources with corn borer eggs as the natural host and rice moth eggs, the factitious host. The laboratory-reared population of T. evanescens reproduced by arrhenotoky. The pattern of egg maturation and deposition of the parasitoid have characteristics of both the synovigenic and pro-ovigenic types. Female wasps without food (no

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Du, Sujie, Fuyu Ye, Shiyun Xu, et al. "Apomixis for no bacteria-induced thelytoky in Diglyphus wani (Hymenoptera: Eulophidae)." Frontiers in Genetics 13 (January 23, 2023). http://dx.doi.org/10.3389/fgene.2022.1061100.

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In Hymenoptera species, the reproductive mode is usually arrhenotoky, where haploid males arise from unfertilized eggs and diploid females from fertilized eggs. In addition, a few species reproduce by thelytoky, where diploid females arise from unfertilized eggs. Diploid females can be derived through various cytological mechanisms in thelytokous Hymenoptera species. Hitherto, these mechanisms were revealed mainly in endosymbiont-induced thelytokous Hymenoptera species. In contrast, thelytokous Hymenoptera species in which a reproductive manipulator has not been verified or several common endo

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