N. A. Petrova’s research while affiliated with Zoological Institute, Russian Academy of Sciences and other places

... In this book, Ninel together with her former Ph. D. student, the late Sergey V. Zhirov (Kuznetsova et al. 2019), reviewed the data on the polytene chromosomes in larvae belonging to five subfamilies of Chironomidae. This book is mostly based on the authors' original materials and contains original microphotographs of polytene chromosomes. ...

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In Memoriam: Cytogeneticist Dr. Sc. Ninel A. Petrova (1940–2024) — life and scientific heritage

... В пределах одного вида общее число В-хромосом остаётся постоянным, но оно варьирует от личинки к личинке. Это подтверждается данными, полученными на ядрах слюнных желёз, мальпигиевых сосудов, делящихся гониальных и ганглиозных клеток одной личинки [Petrova, Zhirov, 2017]. ...

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[Brief review of Сhironomidae and Simuliidae (Diptera) B chromosomes]

... This subfamily, the largest in the family, is almost exclusively aquatic although some immature stages can survive dry conditions by construction of larval or pupal cocoons or by desiccation tolerance, resuming development when rehydrated (Cranston 2014, Cornette et al. 2017. These exceptional taxa are not reported yet from south-east Asia. ...

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An identification guide to the genera of aquatic larval Chironomidae (Diptera) of south-east Asia

... She has made a remarkable contribution to the use of polytene chromosomes of model chironomid species to trace metal pollution in various aquatic ecosystems. Because of her authority as a brilliant expert on chironomid cytogenetics, she was invited to participate in two NATO projects named, respectively, "Polytene chromosomes as a model for heavy metal-induced genome instability" (2004)(2005)(2006) and "Pollution of water resources assessed by genome alterations in midges (2008)(2009)(2010)". As part of these projects carried out jointly with Bulgarian and Italian colleagues (Fig. 3), Ninel studied the influence of heavy metals on the structural and functional organization of chromosomes of model species of chironomids collected in Russia, Bulgaria and Italy. ...

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In Memoriam: Cytogeneticist Dr. Sc. Ninel A. Petrova (1940–2024) — life and scientific heritage

... По данным Чубаревой и Петровой [1984], весной 1964 г. в популяции этого вида из района Петергофа Ленинградской области, 23,3 % особей имели В-хромосомы, а осенью их число увеличилось до 61,8 %. В популяции этого вида из ущелья Азат (Армения) за период с 1972 по 1992 гг. доля особей с В-хромосомами увеличилась в 2,9 раза [Kachvoryan et al., 1996]. Количество мошек с B-хромосомами в крупных загрязнённых реках с разнообразными экологическими нишами оказалось больше, чем в популяциях из ручьёв и малых рек [Chubareva, Petrova, 1984]. ...

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[Brief review of Сhironomidae and Simuliidae (Diptera) B chromosomes]

... Only a few cases of natural hybrids were recorded: Ch. plumosus x Ch. entis (Shobanov, 1989); Ch. plumosus x Ch. muratensis (Ryser, Scholl and Wülker, 1983) [23]; and Ch. riparius (Meigen, 1804) x Ch. piger (Strenzke, 1959) [24,25]. It is noted that hybridization occurs between a few members of the Chironomus oppositus (Walker, 1856) group [26]. ...

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Karyotypes and COI Gene Sequences of Chironomus sp. Le1 (Kiknadze and Salova, 1996), Ch. laetus (Belyanina and Filinkova, 1996) and Their Hybrid from the Yamal Peninsula, Arctic Zone of Russia

... P. vanderplanki has four chromosomes (2n = 8) (23), of which Chromosome 4 has the highest karyotypic diversity and genetic distance in comparison with the recently described anhydrobiotic close relative Polypedilum pembai (23)(24)(25). This chromosome differs from the 'dot chromosome' found in Drosophila, as they are highly repetitive, heterochromatic and harbors very few genes. ...

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High quality genome assembly of the anhydrobiotic midge provides insights on a single chromosome-based emergence of extreme desiccation tolerance

... rosenschoeldi (Kiknadze et al. 1991). Detailed information of all stages of the metamorphosis of S. crassiforceps and its karyotype can be found in Karmokov et al. (2014). Cytogenetic markers for this species and Stictochironomus gr. ...

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The Karyotype and External Morphology of Stictochironomus sticticus (Fabricius, 1781) (Diptera: Chironomidae) from Poland

... As part of these projects carried out jointly with Bulgarian and Italian colleagues (Fig. 3), Ninel studied the influence of heavy metals on the structural and functional organization of chromosomes of model species of chironomids collected in Russia, Bulgaria and Italy. She has been actively involved in the development of these projects and has established the presence of both multiple heritable and a number of somatic chromosomal rearrangements (Michailova et al. 1996(Michailova et al. , 1998(Michailova et al. , 2012Petrova and Michailova 2002;Petrova 2013;Michailova and Petrova 2015). During these years, Ninel conducted classes and lectures for students from Turin and Milan. ...

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In Memoriam: Cytogeneticist Dr. Sc. Ninel A. Petrova (1940–2024) — life and scientific heritage

... Ninel studied the structural and functional organization of polytene chromosomes of chironomids originating from different regions of Russia and from other countries, including Mongolia, Lithuania, Italy, Bulgaria, Belarus, Ukraine and others (Petrova 1990;Petrova et al. 1986Petrova et al. , 1992Petrova et al. , 2000Petrova et al. , 2013Petrova et al. , 2014a. During her life, she participated in many scientific expeditions to collect the material, e.g. to the European North, the Caucasus, Tajikistan and Kyrgyzstan ( Fig. 2A ...

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In Memoriam: Cytogeneticist Dr. Sc. Ninel A. Petrova (1940–2024) — life and scientific heritage