Molecular and cytogenetic differentiation within the Lariophagus distinguendus (Förster, 1841) species complex (Hymenoptera, Pteromalidae)

König, Christian; Paschke, Sina; Pollmann, Marie; Reinisch, Ronja; Gantert, C.; Weber, Justus; Krogmann, Lars; Steidle, Johannes L. M.; Gokhman, Vladimir E.

doi:10.3897/compcytogen.v13i2.34492

Cited by 14 publications

(37 citation statements)

References 26 publications

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“…Therefore, we assumed that during the process of divergence a host switch occurred from drugstore beetles to granary weevils, and that the GWpfo population has retained an ancestral innate preference for drugstore beetles which is also found in the populations of the DB-lineage (König et al, 2015). The assumption that the DB-lineage is ancestral was supported by our recent karyological study (König et al, 2019).…”

Section: Ecological Isolationmentioning

confidence: 82%

“…One prefers drugstore beetles Stegobium paniceum (L.) (Anobiidae) as hosts and is found in households on beetle‐infested products (“DB‐lineage”), while the other is mostly found in granaries attacking the granary weevil Sitophilus granarius (L.) (Dryophthoridae: Curculionoidea) (“GW‐lineage”). Because recent findings demonstrate that the DB‐lineage is ancestral (König et al, ), a host switch must have occurred, from drugstore beetles to granary weevils (König et al, , ). Interestingly, the population GWpfo, which belongs to the GW‐lineage, maintained this ancestral preference for drugstore beetles but was collected from granary weevils in a grain store.…”

Section: Introductionmentioning

confidence: 99%

“…is ancestral (König et al, 2019), a host switch must have occurred, from drugstore beetles to granary weevils (König et al, 2015(König et al, , 2019.…”

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confidence: 99%

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Reproductive isolation due to prezygotic isolation and postzygotic cytoplasmic incompatibility in parasitoid wasps

König

Zundel²,

Krimmer

et al. 2019

Ecology and Evolution

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The reproductive barriers that prevent gene flow between closely related species are a major topic in evolutionary research. Insect clades with parasitoid lifestyle are among the most species‐rich insects and new species are constantly described, indicating that speciation occurs frequently in this group. However, there are only very few studies on speciation in parasitoids. We studied reproductive barriers in two lineages of Lariophagus distinguendus (Chalcidoidea: Hymenoptera), a parasitoid wasp of pest beetle larvae that occur in human environments. One of the two lineages occurs in households preferably attacking larvae of the drugstore beetle Stegobium paniceum (“DB‐lineage”), the other in grain stores with larvae of the granary weevil Sitophilus granarius as main host (“GW‐lineage”). Between two populations of the DB‐lineage, we identified slight sexual isolation as intraspecific barrier. Between populations from both lineages, we found almost complete sexual isolation caused by female mate choice, and postzygotic isolation, which is partially caused by cytoplasmic incompatibility induced by so far undescribed endosymbionts which are not Wolbachia or Cardinium. Because separation between the two lineages is almost complete, they should be considered as separate species according to the biological species concept. This demonstrates that cryptic species within parasitoid Hymenoptera also occur in Central Europe in close contact to humans.

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Section: Ecological Isolationmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Reproductive isolation due to prezygotic isolation and postzygotic cytoplasmic incompatibility in parasitoid wasps

König

Zundel²,

Krimmer

et al. 2019

Ecology and Evolution

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“…Nowadays, chromosomes of Chalcidoidea are most often stained with Giemsa solution diluted in Sorensen's phosphate buffer (Gokhman 2009). Nevertheless, routinely stained karyotypes can be further studied using morphometric analysis which already proved its effectiveness for finding both similarities and differences between closely related forms of Chalcidoidea (Gokhman and Westendorff 2000;König et al 2019). Use of this technique in chalcids is facilitated by the generally low chromosome numbers that are characteristic of most Chalcidoidea.…”

Section: Nowadays the Technique Developed Bymentioning

confidence: 99%

“…The last detailed review of the chromosome study of Chalcidoidea was published more than a decade ago (Gokhman 2009, see also Gokhman and Gumovsky 2009), with only about 170 examined species. Consequently, important results of the karyotypic study of chalcids accumulated during this time, especially those obtained with the help of certain advanced techniques, substantially changed our views on the phylogenetic and taxonomic implications of chromosomal characters of this group (Gokhman 2013;Baur et al 2014;König et al 2019). An updated overview of the karyotypic study of the superfamily Chalcidoidea is therefore given below.…”

Section: Introductionmentioning

confidence: 99%

Chromosomes of parasitic wasps of the superfamily Chalcidoidea (Hymenoptera): An overview

Gokhman¹

2020

CCG

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An overview of the current knowledge of chromosome sets of the parasitoid superfamily Chalcidoidea is given. Karyotypes of approximately 240 members of this group, i.e. just above one percent of described species, are studied up to now. Techniques for obtaining and analyzing preparations of chalcid chromosomes are outlined, including the so-called “traditional” and “modern” methods of differential staining as well as fluorescence in situ hybridization (FISH). Among the Chalcidoidea, the haploid chromosome number can vary from n = 3 to n = 11, with a clear mode at n = 6 and a second local maximum at n = 10. In this group, most chromosomes are either metacentric or submetacentric, but acrocentrics and/or subtelocentrics also can predominate, especially within karyotypes of certain Chalcidoidea with higher chromosome numbers. The following main types of chromosomal mutations are characteristic of chalcid karyotypes: inversions, fusions, translocations, polyploidy, aneuploidy and B chromosome variation. Although karyotype evolution of this superfamily was mainly studied using phylogenetic reconstructions based on morphological and/or molecular characters, chromosomal synapomorphies of certain groups were also revealed. Taxonomic implications of karyotypic features of the Chalcidoidea are apparently the most important at the species level, especially among cryptic taxa.

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New species based on the biological species concept within the complex of Lariophagus distinguendus (Hymenoptera, Chalcidoidea, Pteromalidae), a parasitoid of household pests

Pollmann,

Kuhn,

König

et al. 2023

Ecology and Evolution

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The pteromalid parasitoid Lariophagus distinguendus (Foerster) belongs to the Hymenoptera, a megadiverse insect order with high cryptic diversity. It attacks stored product pest beetles in human storage facilities. Recently, it has been shown to consist of two separate species. To further study its cryptic diversity, strains were collected to compare their relatedness using barcoding and nuclear genes. Nuclear genes identified two clusters which agree with the known two species, whereas the barcode fragment determined an additional third Clade. Total reproductive isolation (RI) according to the biological species concept (BSC) was investigated in crossing experiments within and between clusters using representative strains. Sexual isolation exists between all studied pairs, increasing from slight to strong with genetic distance. Postzygotic barriers mostly affected hybrid males, pointing to Haldane's rule. Hybrid females were only affected by unidirectional Spiroplasma‐induced cytoplasmic incompatibility and behavioural sterility, each in one specific strain combination. RI was virtually absent between strains separated by up to 2.8% COI difference, but strong or complete in three pairs from one Clade each, separated by at least 7.2%. Apparently, each of these clusters represents one separate species according to the BSC, highlighting cryptic diversity in direct vicinity to humans. In addition, these results challenge the recent ‘turbo‐taxonomy’ practice of using 2% COI differences to delimitate species, especially within parasitic Hymenoptera. The gradual increase in number and strength of reproductive barriers between strains with increasing genetic distance also sheds light on the emergence of barriers during the speciation process in L. distinguendus.

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Molecular and cytogenetic differentiation within the Lariophagus distinguendus (Förster, 1841) species complex (Hymenoptera, Pteromalidae)

Cited by 14 publications

References 26 publications

Reproductive isolation due to prezygotic isolation and postzygotic cytoplasmic incompatibility in parasitoid wasps

Reproductive isolation due to prezygotic isolation and postzygotic cytoplasmic incompatibility in parasitoid wasps

Chromosomes of parasitic wasps of the superfamily Chalcidoidea (Hymenoptera): An overview

New species based on the biological species concept within the complex of Lariophagus distinguendus (Hymenoptera, Chalcidoidea, Pteromalidae), a parasitoid of household pests

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