The use of salivary gland chromosomes of Chironomids (Diptera, Chironomidae) for assessing the pollution of aquatic ecosystems

Petrova, N. A.; Michailova, Paraskeva

doi:10.15298/euroasentj.20.1.06

Cited by 1 publication

(3 citation statements)

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“…All of the larvae studied by us were identified with chromosomal banding sequences characteristic for C. "annularius". A sequence that was previously found exclusively in the Nearctic region was found for the first time in larvae from Lake Sevan, and should be named Holarctic h'annD3, as in the case of h'annG3 [17]. The phylogenetic tree has the largest cluster, which includes COI gene sequences from Irkutsk, Yaroslavl, China, Mongolia, Finland, Sweden, and Germany, which most probably matches a widespread species Chironomus annularius (Meigen, 1818), because of high similarity with the reference German population that is closest to the type locality of the species.…”

Section: Discussionmentioning

confidence: 92%

“…The rare banding sequence p'annF1.1 from Yaroslavl and Mongolia was previously found only in one South Caucasian (Georgian) and the Kazakhstan populations [6,10]. The banding sequence h'annG3.3 was previously considered Nearctic; after finding it in C. "annularius" larvae from Lake Khubsugul (Mongolia), it began to be considered Holarctic [17]. The most interesting finding was the Nearctic sequence n'annD3.3; previously, it was found exclusively in North America (USA and Canada) [10].…”

Section: Discussionmentioning

confidence: 99%

“…The karyotype and chromosomal polymorphism of C. "annularius" has also been studied from Nearctic populations [10,[14][15][16]. In C. "annularius" from Lake Khubsugul in North Mongolia, the Nearctic banding sequence h'annG3 was found in a homozygous state [17]. Recently, the karyotype and chromosomal polymorphism of C. "annularius" were studied in detail in South Caucasian populations, and the banding pool was enriched with new sequences [6].…”

Section: And Kiknadzementioning

confidence: 99%

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Karyotypes and COI Gene Sequences of Chironomus annularius Sensu Lato (Diptera, Chironomidae) from Russia, Mongolia, and Armenia

Bolshakov,

Prokin,

Mayor

et al. 2023

Water

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The larvae of the genus Chironomus are a common object for hydrobiological studies, as well as a model object for cytogenetics. Morphologically, the species are very similar. One of these species or species complex is Chironomus “annularius”, which has a Holarctic distribution. It has chromosomal banding sequences characteristic of Nearctic and Palearctic populations. Using an integrated method that included morphology, cytogenetics, and molecular genetics, we analyzed populations from Russia, Mongolia, and Armenia. We found through cytogenetics and larval morphology that the populations have high similarity. Molecular genetic studies have shown significant differences between the populations. The genetic distances between the populations, in some cases, exceed the interspecific threshold of 3%, and are 6.5%. In the South Caucasian population (Lake Sevan), a chromosomal banding sequence, h’annD3, that was previously observed only in North America, was found for the first time. The larvae from Lake Sevan have large genetic distances from others, and are morphologically similar to the species Chironomus markosjani Shilova 1983, described from this lake without comparison with Ch. annularius nor an exact description of the karyotype. The sequences of the COI genes from Montenegro (Lake Skadar) and West Siberia (Novosibirsk) found in GenBank may belong to a new undescribed species, or a species not represented in the database. Thus, the analyzed data on Chironomus “annularius” support the presence of the complex of homosequential species under this name.

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Section: Discussionmentioning

confidence: 92%