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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vavilov</journal-id><journal-title-group><journal-title xml:lang="ru">Вавиловский журнал генетики и селекции</journal-title><trans-title-group xml:lang="en"><trans-title>Vavilov Journal of Genetics and Breeding</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-3259</issn><publisher><publisher-name>Institute of Cytology and Genetics of Siberian Branch of the RAS</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18699/VJ18.349</article-id><article-id custom-type="elpub" pub-id-type="custom">vavilov-1443</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕДИЦИНСКАЯ ГЕНЕТИКА, НЕЙРОГЕНЕТИКА, ИММУНОГЕНЕТИКА, БИОМЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>POPULATION GENETICS</subject></subj-group></article-categories><title-group><article-title>Полиморфизм T3111C гена Clock у женщин русской и бурятской национальности</article-title><trans-title-group xml:lang="en"><trans-title>Polymorphism T3111C of the Clock gene in ethnic groups of women from Russia and Buryatia</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калюжная</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaluzhnaya</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>Irkutsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Семенова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Semenova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>Irkutsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баирова</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bairova</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>Irkutsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мадаева</surname><given-names>И. М.</given-names></name><name name-style="western" xml:lang="en"><surname> Madaeva</surname><given-names>I. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>Irkutsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Беляева</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyaeva</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>Irkutsk</p></bio><email xlink:type="simple">belyeva_irk@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колесникова</surname><given-names>Л. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolesnikova</surname><given-names>L. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>Irkutsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Научный центр проблем здоровья семьи и репродукции человека<country>Россия</country></aff><aff xml:lang="en">Scientific Centre for Family Health and Human Reproduction Problems<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>06</day><month>04</month><year>2018</year></pub-date><volume>22</volume><issue>2</issue><fpage>212</fpage><lpage>216</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Калюжная О.В., Семенова Н.В., Баирова Т.А., Мадаева И.М., Беляева Е.В., Колесникова Л.И., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Калюжная О.В., Семенова Н.В., Баирова Т.А., Мадаева И.М., Беляева Е.В., Колесникова Л.И.</copyright-holder><copyright-holder xml:lang="en">Kaluzhnaya O.V., Semenova N.V., Bairova T.A.,  Madaeva I.M., Belyaeva E.V., Kolesnikova L.I.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vavilov.elpub.ru/jour/article/view/1443">https://vavilov.elpub.ru/jour/article/view/1443</self-uri><abstract><p>В двух выборках женщин климактерического возраста русской и бурятской национальности, проживающих в Восточной Сибири (Иркутская область, г. Иркутск и Республика Бурятия, г. Улан-Удэ), изучена распространенность генотипов и аллелей T3111C полиморфизма гена циркадного ритма Clock (rs1801260). Для этого было проведено генотипирование образцов ДНК методом полимеразной цепной реакции. Показано, что сравниваемые группы статистически значимо отличаются по частоте встречаемости генотипов (р = 0.001). Обнаружено, что в выборке русских женщин больше частота TC генотипа (р = 0.004) и меньше частота TT генотипа (р = 0.0001) по сравнению с выборкой женщин из Бурятии. Аллель с измененной последовательностью 3111С у русских женщин встречался в 30.4 % случаев, что статистически значимо чаще по сравнению с выборкой бурят, где доля аллеля 3111С составила 19.3 % (p = 0.014).</p></abstract><trans-abstract xml:lang="en"><p>Biological rhythms of organisms depend on both changing conditions of the external environment and internal “biological clock”. Circadian rhythms are the response of the organism to the change of day and night. They are some of the most important biological rhythms of organisms. Circadian rhythms are regulated by the group of circadian genes. It is known that women suffer from sleep disorders more often than men. Up to 50 % of menopausal women complain of problems associated with sleeping. The study involved 403 menopausal women aged from 45 to 60 years: 214 Russians (the average age is 52.74±6.28 years) and 189 Buryats (the average age is 51.95±5.13 years) living in Eastern Siberia (Irkutsk region, Irkutsk and Republic of Buryatia, Ulan-Ude). The prevalence of genotypes and alleles of the polymorphism T3111C of the circadian rhythm gene Clock (rs1801260) was studied in these groups. To this end, we conducted genotyping of DNA samples by polymerase chain reaction. It was shown that the compared groups have statistically significant differences in genotypes frequency (р = 0.001). It was found that in the group of Russian women the frequency of the TC genotype (p = 0.004) was significantly higher and the frequency of the TT genotype (p = 0.0001) was significantly lower than those in the sample of women of Buryatia. It was shown that in the group of Russian women allele 3111C is found in 30.4 % of cases, which is statistically significantly more often than in the group of Buryat women, where the frequency of allele 3111C was 19.3 % (p = 0.014).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>циркадный ритм</kwd><kwd>гены</kwd><kwd>полиморфизм</kwd><kwd>популяция</kwd></kwd-group><kwd-group xml:lang="en"><kwd>circadian rhythm</kwd><kwd>genes</kwd><kwd>polymorphism</kwd><kwd>population</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bairova T.A., Dolgikh V.V., Kolesnikova L.I., Pervushina O.A. 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