�ber eine heterochromatin-mutation aus einer wildpopulation von chironomus nuditarsis I. Zur funktion des ver�nderten genom-abschnittes

Fischer, J.; Tichy, Herbert

doi:10.1007/bf00122406

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…8 same phenomenon has been observed in C. bernensis from northern Italy (Petrova and Michailova 2002). Such a "dark knob" has also been found in Chironomus nuditarsis (Fischer and Tichy 1980) in Switzerland. The authors considered the specimens with this "dark knob" as a mutant, found in the natural population, where G at its distal part lacks the Balbiani ring and presents a large compact chromatin mass.…”

Section: Discussionmentioning

confidence: 92%

Effect of Contaminants on the Genome of Some Species of Genus Chironomus (Chironomidae, Diptera) Live in Sediments of Dunajec River and Czorsztyn Reservoir

Michailova

Szarek-Gwiazda

Kownacki

2009

Water Air Soil Pollut

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The effect of contaminants on the genomes of Chironomus plumosus L. and Chironomus bernensis Wülker, Klötzli species was studied in the Dunajec River (station 1) and in the littoral of Czorsztyn Reservoir (stations 2 and 3). According to the index of geoaccumulation, the sediments were polluted by cadmium (Cd) and chromium (Cr). Cd concentrations at stations 1, 2, and 3 were 0.71, 0.56, and 1.27 μg g −1 , while Cr concentrations were 841.5, 186.9, and 40.7 μg g −1 , respectively. The pH of sediments ranged from 6.7 to 7.

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Section: Discussionmentioning

confidence: 92%

Effect of Contaminants on the Genome of Some Species of Genus Chironomus (Chironomidae, Diptera) Live in Sediments of Dunajec River and Czorsztyn Reservoir

Michailova

Szarek-Gwiazda

Kownacki

2009

Water Air Soil Pollut

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“…Dr. Fischer has done excellent work on the biology, physiology and genetics of Ch. nuditarsis ( Rosin and Fischer 1966 ; Fischer 1969 , 1974 ; Fischer and Rosin 1969 ; Fischer and Tichy 1980 ; Adamek 2020 ); thanks to the study of the biology of Ch. nuditarsis , it became possible to maintain a laboratory culture of this species ( Fischer 1969 ).…”

Section: Introductionmentioning

confidence: 99%

The first record of Chironomus nuditarsis Keyl, 1961 from Sevan Lake (Armenia) confirmed by morphology, karyotype and COI gene sequence

Bolshakov,

Prokin,

Ivanova

et al. 2024

CCG

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Chironomus nuditarsis Keyl, 1961 is recorded from Sevan Lake for the first time. This species is widespread in Europe, the Caucasus, and Siberia. For species identification, we used a comprehensive approach that included morphological, cytogenetic and molecular genetic analyses. Morphological analysis showed a high similarity with the description. Nine chromosome banding sequences ndtA1, ndtA2, ndtB2, ndtC1, ndtD1, ndtE1, ndtF1, ndtG1, and ndtG2 were found. The banding sequences ndtA1, ndtA2, ndtG1, and ndtG2 are species-specific for C. nuditarsis and allow us to accurately distinguish it from the sibling species Ch. curabilis Belyanina, Sigareva et Loginova, 1990. Molecular-genetic analysis of the COI gene sequences has shown low genetic distances of 0.38–0.95% in the sibling species Ch. nuditarsis and Ch. curabilis complex and the insufficiency of using a single COI as a molecular marker for their separation.

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“…Earlier a high level of chromosomal polymorphism (inversions, reciprocal translocations, DNA-knobs) was observed in West and East European populations of Ch. nuditarsis ( Rosin and Fischer, 1965 , Rosin and Fischer, 1966 , Rosin and Fischer, 1972 , Fischer, 1978 , Fischer and Rosin, 1967 , Fischer and Tichy, 1980 , Michailova, 1989 , Zhirov and Petrova, 1993 , Petrova et al, 2000 , Polukonova et al, 2005 , Polukonova, 2005 ). Kiknadze and coauthors ( Kiknadze et al, 2006 ) presented a comparison of karyotypes and chromosomal polymorphism between European and Asian Ch.…”

Section: Introductionmentioning

confidence: 99%

Karyotype structure and polymorphism peculiarities of Chironomus nuditarsis Keyl, 1961 (Diptera, Chironomidae) from natural populations of North Caucasus

Karmokov

2020

Saudi Journal of Biological Sciences

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The study presents data on the karyotype characteristics and features of chromosomal polymorphism of Chironomus nuditarsis Keyl, 1961 (Diptera, Chironomidae) from seven natural populations of Caucasus (Northwest, Central and East Caucasus). We found 16 banding sequences in the Caucasian populations. We observed inversion polymorphism almost in all chromosome arms except for arms C and E. The genetic distances between all the studied populations of Ch. nuditarsis were calculated using Nei criteria (1972). In spite of relative geographic proximity, the genetic distances between populations of the Caucasus are quite big, and they do not form a single cluster of Caucasian populations. The population of the Northwest Caucasus goes to European cluster; the populations of Central and East Caucasus form their own separate clusters. The principal component analysis (PCA) shows the similar picture. We suggest that such a clear separation of Caucasian populations in distinct clusters is a result of differences of collection sites in terms of geography and climate (complex diverse terrain and microclimate conditions). Four of the Caucasian populations do not follow Hardy-Weinberg expectation. In two populations, there being a marked deficiency of heterozygotes in arms B, F and G. In two other populations, there being a marked excess of heterozygotes in arms B and G. One can suggest that observed pictures could be a reflection of multi-directional selection of heterozygotes in different populations. The populations of Ch. nuditarsis from different parts of the Caucasus possibly diverged from each other at the level of subspecies. All the obtained data are indicative of the complex genetic structure of Caucasian populations of Ch. nuditarsis and total complexity of microevolution processes occurring in the Caucasus region.

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�ber eine heterochromatin-mutation aus einer wildpopulation von chironomus nuditarsis I. Zur funktion des ver�nderten genom-abschnittes

Cited by 8 publications

References 4 publications

Effect of Contaminants on the Genome of Some Species of Genus Chironomus (Chironomidae, Diptera) Live in Sediments of Dunajec River and Czorsztyn Reservoir

Effect of Contaminants on the Genome of Some Species of Genus Chironomus (Chironomidae, Diptera) Live in Sediments of Dunajec River and Czorsztyn Reservoir

The first record of Chironomus nuditarsis Keyl, 1961 from Sevan Lake (Armenia) confirmed by morphology, karyotype and COI gene sequence

Karyotype structure and polymorphism peculiarities of Chironomus nuditarsis Keyl, 1961 (Diptera, Chironomidae) from natural populations of North Caucasus

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