Chromosome Study of the Hymenoptera: History, Current State, Perspectives

Gokhman, Vladimir E.

doi:10.1134/s2079086423030040

Cited by 4 publications

(3 citation statements)

References 90 publications

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“…Additionally, Phaenoglyphis villosa has radial cells partially open, as well as two other Phaenoglyphis species (P. china: Ferrer-Suay and Pujade-Villar 2013, and P. asiatica: Ferrer-Suay and Pujade-Villar 2013). Finally, cryptic species and complexes of species are very common for Hymenoptera that are parasitic [57], making their study more complicated. The novel relationship uncovered here warrants further exploration in future studies.…”

Section: Discussionmentioning

confidence: 99%

Molecular Data Confirm Interspecific Limits of Four Alloxysta and One Phaenoglyphis Species of Parasitic Wasps within the Subfamily Charipinae (Cynipoidea: Figitidae)

Ferrer-Suay,

Bulgarella,

Heimpel

et al. 2024

Insects

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The hymenopteran subfamily Charipinae (Cynipoidea: Figitidae) consist of a group of parasitic wasps that are exclusive hyperparasitoids of Hemipteran. The species boundaries in Charipinae have historically been unclear. While diagnostic morphological features have been established for the stepwise separation of species, it is recommended to confirm those limits using molecular data. Here, we focus on the genera Alloxysta Förster, 1869 and Phaenoglyphis Förster, 1869, both of which contain species that are hyperparasitoids of aphids. We sequenced three genes (mitochondrial COI and 16S rDNA, and nuclear ITS2 rDNA) from specimens that were identified as belonging to five species: Alloxysta brevis (Thomson, 1862), A. castanea (Hartig, 1841), A. ramulifera (Thomson, 1862), A. victrix (Westwood, 1833), and Phaenoglyphis villosa (Hartig, 1841). The phylogeny resulting from concatenating these genes supported the species status of the five morphologically identified taxa, with P. villosa nested within Alloxysta. Our study thus indicates that these molecular markers can successfully distinguish charipine species, and also indicates that the genera Alloxysta and Phaenoglyphis may be more closely related than previously hypothesized. We also present the first estimates of genetic distances for these species. Future studies that include more species, loci, and/or genomic data will complement our research and help determine species relationships within the Charipinae subfamily.

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Section: Discussionmentioning

confidence: 99%

Molecular Data Confirm Interspecific Limits of Four Alloxysta and One Phaenoglyphis Species of Parasitic Wasps within the Subfamily Charipinae (Cynipoidea: Figitidae)

Ferrer-Suay,

Bulgarella,

Heimpel

et al. 2024

Insects

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“…In addition to the routine staining, a few karyotypes of the family Tenthredinidae were studied using either "traditional" or "modern" techniques of chromosome banding (see [Gokhman, 2023]). Specifi cally, chromosomes of several members of the genera Tenthredo Linnaeus, 1758 and Rhogogaster Konow, 1884 were subjected to C-and AgNOR-bandings, which reveal distribution of the constitutive heterochromatin and nucleolus organizing regions (NORs) respectively [Kuznetsova et al, 2001].…”

Section: General Features Of Chromosome Sets Of Symphytamentioning

confidence: 99%

“…The suborder Symphyta (= lower Hymenoptera), or sawfl ies and horntails, represents a relatively minor and the least advanced hymenopteran group. It includes more than 8,000 described species [Huber, 2017], but karyotypes of just about 400 members of this suborder, i.e., less than fi ve per cent of its known species number, are studied up to now [Westendorff, 2006;Gokhman, 2023]. Nevertheless, chromosomes of this group were intensively studied during previous decades.…”

Section: Introductionmentioning

confidence: 99%

Chromosomes of Symphyta (Hymenoptera): current state and perspectives of research

Gokhman

2023

euroasentj

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The current state and perspectives of karyotype research on the suborder Symphyta (Hymenoptera), or sawfl ies and horntails, are discussed. The haploid chromosome number (n) in the studied members of the group can vary from 5 to 35, although the ancestral state of this character is apparently closer to n = 25. Metacentrics and submetacentrics prevail in the karyotypes of the majority of Symphyta, but subtelocentrics and/or acrocentrics are often present in the chromosome sets of species with higher chromosome numbers. In the process of karyotype evolution, most horntails and sawfl ies retained higher n values, but this variable decreased in the superfamily Tenthredinoidea down to n = 10 and less. Prospective directions of chromosome research of the Symphyta imply a detailed investigation of the karyotype structure of these insects, including preparation of karyograms and morphometric analysis of chromosomes, as well as the chromosome study of horntails and sawfl ies by using techniques of molecular cytogenetic analysis.РЕЗЮМЕ. Обсуждается нынешнее состояние и перспективы исследования кариотипов перепончатокрылых, относящихся к подотряду сидячебрюхих (Symphyta), или рогохвостов и пилильщиков. Гаплоидное число хромосом (n) у исследованных представителей данной группы может изменяться от 5 до 35, но анцестральное значение этого признака, очевидно, близко к n = 25. В составе кариотипов большинства Symphyta преобладают метацентрики и субметацентрики, однако в хромосомных наборах видов с высоким числом хромосом часто присутствуют субтелоцентрики и/или акроцентрики. В ходе эволюции кариотипа большинство пилильщиков и рогохвостов сохраняли высокие значения n, однако в надсемействе Tenthredinoidea произошло снижение этого показателя до n = 10 и ниже. Перспективные направления хромосомного исследования Symphyta, очевидно, связаны с детальным изучением структуры кариотипа этих насекомых, включая составление кариограмм и морфометрический анализ хромосом, а также с исследованием хромосомных наборов рогохвостов и пилильщиков с помощью методов молекулярной цитогенетики.

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Chromosome Mapping of Ribosomal DNA Clusters in Four Leaf-cutting Ant Species of the Genus Acromyrmex, with Description of a Triploid Individual in A. laticeps

Barros,

Teixeira,

Lod

et al. 2024

Sociobiology

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The increase of cytogenetic data in the leaf-cutting genus Acromyrmex has shown interesting contributions to the evolutionary and taxonomic approaches, including the creation of a new genus and the description of chromosomal patterns allowing comparative studies within Acromyrmex as well as between this genus and other similar taxa. The conserved chromosome number in Acromyrmex is a notable feature, with some distinguishable chromosomes among the species. In this study, we describe the diploid karyotype of Acromyrmex laticeps in addition to an individual with all the metaphases triploids, suggesting a triploid individual. To the best of our knowledge, this is the first report of polyploidy in a fungus-growing ant. Furthermore, we mapped 18S ribosomal DNA on the chromosomes of A. laticeps and three other Acromyrmex species. Among them, three species showed the ribosomal DNA cluster pattern observed in other previously studied members of this genus, with a terminal location in the largest subtelocentric pair. Meanwhile, Acromyrmex balzani had these ribosomal DNA clusters in its entire short arm. The role of triploidy in ant evolution has also been discussed. The increase in chromosomal data of leaf-cutting ants may provide significant insights into the evolution of this peculiar ant group.

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Chromosome Study of the Hymenoptera: History, Current State, Perspectives

Cited by 4 publications

References 90 publications

Molecular Data Confirm Interspecific Limits of Four Alloxysta and One Phaenoglyphis Species of Parasitic Wasps within the Subfamily Charipinae (Cynipoidea: Figitidae)

Molecular Data Confirm Interspecific Limits of Four Alloxysta and One Phaenoglyphis Species of Parasitic Wasps within the Subfamily Charipinae (Cynipoidea: Figitidae)

Chromosomes of Symphyta (Hymenoptera): current state and perspectives of research

Chromosome Mapping of Ribosomal DNA Clusters in Four Leaf-cutting Ant Species of the Genus Acromyrmex, with Description of a Triploid Individual in A. laticeps

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