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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Ecological genetics</journal-id><journal-title-group><journal-title xml:lang="en">Ecological genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Экологическая генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1811-0932</issn><issn publication-format="electronic">2411-9202</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">2400</article-id><article-id pub-id-type="doi">10.17816/ecogen1313-9</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Statistical approach to the problem of the taxonomic status and evolutionary potential of a non-biting midge Prodiamesa olivacea Meigen (1818) (Diptera, Chironomidae, Prodiamesinae) based on karyotype analysis</article-title><trans-title-group xml:lang="ru"><trans-title>Статистический подход к вопросу о таксономическом статусе и эволюционном потенциале комара-звонца Prodiamesa olivacea Meigen (1818) (Diptera, Chironomidae, Prodiamesinae) на основе анализа кариотипа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mylnikov</surname><given-names>Sergey Vladimirovich</given-names></name><name xml:lang="ru"><surname>Мыльников</surname><given-names>Сергей Владимирович</given-names></name></name-alternatives><bio xml:lang="en"><p>school of biology, Department of Genetics and Biotechnology</p></bio><bio xml:lang="ru"><p>биологический факультет, кафедра генетики и биотехнологии</p></bio><email>S.mylnikov@spbu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhirov</surname><given-names>Sergey Vital'evich</given-names></name><name xml:lang="ru"><surname>Жиров</surname><given-names>Сергей Витальевич</given-names></name></name-alternatives><bio xml:lang="en"><p>department of karyosystematics</p></bio><bio xml:lang="ru"><p>отделение кариосистематики</p></bio><email>svzhiroff@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">St. Petersburg State University</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Zoological Institute RAS</institution></aff><aff><institution xml:lang="ru">Зоологический институт РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2015-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2015</year></pub-date><volume>13</volume><issue>1</issue><issue-title xml:lang="en">VOL 13, NO1 (2015)</issue-title><issue-title xml:lang="ru">ТОМ 13, №1 (2015)</issue-title><fpage>3</fpage><lpage>9</lpage><history><date date-type="received" iso-8601-date="2016-03-30"><day>30</day><month>03</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2015, Mylnikov S.V., Zhirov S.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2015, Мыльников С.В., Жиров С.В.</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="en">Mylnikov S.V., Zhirov S.V.</copyright-holder><copyright-holder xml:lang="ru">Мыльников С.В., Жиров С.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/ecolgenet/article/view/2400">https://journals.eco-vector.com/ecolgenet/article/view/2400</self-uri><abstract xml:lang="en"><p>The frequency of contacts of centromere and telomere regions of polytene chromosomes in the karyotype of a midge Prodiamesa olivacea has been analyzed. The fact of non-random frequency of centromere regions contacts has been confirmed by statistical methods. These data are consistent with the diploid number of chromosomes equal to 10. The species has been announced as a “transitional form”, evolving towards reduction of the chromosome number.</p></abstract><trans-abstract xml:lang="ru"><p>Проанализированы частоты контактов политенных хромосом центромерными и теломерными участками в кариотипе хирономиды Prodiamesa olivacea. Статистически подтверждена неслучайность групп контактов центромерными участками, соответствующих диплоидному числу хромосом, равному 10. Вид анонсирован как «переходная форма», эволюционирующая по пути уменьшения числа хромосом.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Prodiamesa olivacea</kwd><kwd>Prodiamesa olivacea</kwd><kwd>polytene chromosomes</kwd><kwd>diploid number of chromosomes</kwd><kwd>the irregular chromosome associations</kwd><kwd>chromocenter</kwd><kwd>Chi-squared test</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>политенные хромосомы</kwd><kwd>диплоидный набор хромосом</kwd><kwd>нерегулярные ассоциации хромосом</kwd><kwd>хромоцентр</kwd><kwd>метод хи-квадрат</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Глотов Н. В., Животовский Л. А., Хованов И. В., Хромов-Борисов Н. Н. (1982) Биометрия. Л.: Изд-во ЛГУ. 263 с.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Жимулев И. Ф. (1993) Гетерохроматин и эффект положения гена. 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