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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">izvestiiatimacad</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Тимирязевской сельскохозяйственной академии</journal-title><trans-title-group xml:lang="en"><trans-title>IZVESTIYA OF TIMIRYAZEV AGRICULTURAL ACADEMY</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-342X</issn><publisher><publisher-name>ФГБОУ ВО РГАУ-МСХА имени К.А. Тимирязева</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26897/0021-342X-2026-3-69-81</article-id><article-id custom-type="elpub" pub-id-type="custom">izvestiiatimacad-1147</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>ГЕНЕТИКА, БИОТЕХНОЛОГИЯ, СЕЛЕКЦИЯ И СЕМЕНОВОДСТВО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>GENETICS, BIOTECHNOLOGY, BREEDING AND SEED PRODUCTION</subject></subj-group></article-categories><title-group><article-title>Молекулярно-генетический анализ генотипов картофеля на фитофтороустойчивость</article-title><trans-title-group xml:lang="en"><trans-title>Molecular genetic analysis of potato genotypes for late blight resistance</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3655-5166</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Догузова</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Doguzova</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Догузова Нино Нодаровна, научный сотрудник, лаборатория молекулярно-генетических исследований сельскохозяйственных растений</p><p>363110, РСО-Алания, Пригородный район, с. Михайловское, ул. Вильямса</p></bio><bio xml:lang="en"><p>Nino N. Doguzova, Research Associate at the Laboratory of Molecular Genetic Research of Agricultural Plants</p><p>1 Vil’yamsa St., Mikhaylovskoe Vlg., Prigorodny District, Republic North Ossetia-Alania, 363110</p></bio><email xlink:type="simple">doguzovanino@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3000-8615</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Газданова</surname><given-names>И. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Gazdanova</surname><given-names>I. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Газданова Ирина Олеговна, канд. с.-х. наук, старший научный сотрудник, лаборатория молекулярно-генетических исследований сельскохозяйственных растений</p><p>363110, РСО-Алания, Пригородный район, с. Михайловское, ул. Вильямса</p></bio><bio xml:lang="en"><p>Irina O. Gazdanova, Senior Research Associate at the Laboratory of Molecular Genetic Research of Agricultural Plants</p><p>1 Vil’yamsa St., Mikhaylovskoe Vlg., Prigorodny District, Republic North Ossetia-Alania, 363110</p></bio><email xlink:type="simple">gazdanovaira2020@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный научный центр «Владикавказский научный центр Российской академии наук»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Vladikavkaz Scientific Centre of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>31</day><month>07</month><year>2026</year></pub-date><volume>0</volume><issue>3</issue><fpage>69</fpage><lpage>81</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Догузова Н.Н., Газданова И.О., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Догузова Н.Н., Газданова И.О.</copyright-holder><copyright-holder xml:lang="en">Doguzova N.N., Gazdanova I.O.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://izvestiia.timacad.ru/jour/article/view/1147">https://izvestiia.timacad.ru/jour/article/view/1147</self-uri><abstract><p>Повышение урожайности сельскохозяйственных культур и их адаптация к изменяющимся условиям произрастания являются одними из нескольких средств обеспечения продовольственной безопасности. Картофель является наиболее важной культурой в рационе питания человека и выращивается на всех континентах. Селекционеры призваны сыграть важную роль в обеспечении устойчивого производства картофеля путем выведения новых устойчивых сортов и с повышенной урожайностью с 1 га. Начиная с 1990-х гг. генетика стала играть все более важную роль в селекции растений благодаря внедрению ДНК-маркеров в качестве косвенных вспомогательных средств отбора или для изучения генетического разнообразия. Сегодня основанные на геномике методы селекции растений – такие, как маркерная селекция (MAS) и геномная селекция (GS), ускоряют селекционный процесс многих важнейших культур. Цель работы заключалась в выявлении генов, определяющих резистентность к фитофторозу 30 перспективных картофельных гибридов с использованием ДНК-маркеров. Лабораторный анализ на устойчивость к фитофторозу проведен в лаборатории молекулярно-генетических исследований сельскохозяйственных растений Владикавказского научного центра Российской академии наук. Предварительно селекционный материал был оценен в полевых условиях в соответствии с рекомендациями по селекционному процессу для картофеля. Геномную ДНК выделяли из листьев картофеля в период цветения по СТАВ-методу. По результатам молекулярно-генетического анализа было установлено наличие трех маркеров: R1–1250, R3a-1380 и R3b-378, которые были идентифицированы в 5 различных гибридах картофеля: 3375–1 (Тирас и Бриз), 3403–2 (Аризоны и Фрителлы), 3341–2 (Инноватор и Мираж), 3352–1 (Колетте и Мираж) и 3352–4 (Колетте и Мираж). Наличие всех трех генов указывает на высокую степень устойчивости к фитофторозу. Таким образом, выделение генотипов картофеля с применением молекулярных маркеров позволяет ускорить селекционный процесс при выведении новых устойчивых  сортов картофеля.</p></abstract><trans-abstract xml:lang="en"><p>Increasing crop yields and enhancing their adaptation to changing growing conditions are among the key strategies for ensuring food security. Potato is one of the most important food crops worldwide and is cultivated on all continents. Plant breeders play a crucial role in ensuring sustainable potato production by developing new resistant varieties with increased yield per hectare. Since the 1990s, genetics has played an increasingly important role in plant breeding through the introduction of DNA markers as indirect selection tools and for the assessment of genetic diversity. Today, genomics-based plant breeding approaches, such as marker-assisted selection (MAS) and genomic selection (GS), accelerate the breeding process for many major crops. The aim of this study was to identify genes conferring late blight resistance in 30 promising potato hybrids using DNA markers. Laboratory analyses for late blight resistance were conducted at the Laboratory of Molecular Genetic Research of Agricultural Plants at the Vladikavkaz Scientific Center of the Russian Academy of Sciences. The breeding material was preliminarily evaluated under field conditions in accordance with the recommendations for potato breeding programs. Genomic DNA was extracted from potato leaves during the flowering period using the CTAB method. For molecular genetic analysis of late blight resistance, the following R-gene molecular markers were used: R1–1250, R3a-1380, and R3b-378. The molecular genetic analysis revealed the presence of all three markers R1–1250, R3a-1380, and R3b-378. They were identified in five different potato hybrids. These hybrids included: 3375–1 (Tiras × Breeze), 3403–2 (Arizona × Fritella), 3341–2 (Innovator × Mirage), 3352–1 (Kolette × Mirage), and 3352–4 (Kolette × Mirage). The presence of all three genes indicates a high degree of late blight resistance. Thus, the identification of potato genotypes using molecular markers facilitates the acceleration of the breeding process for developming new resistant potato varieties.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>картофель</kwd><kwd>генотип</kwd><kwd>болезнь</kwd><kwd>Phytophthora infestans</kwd><kwd>устойчивость</kwd><kwd>ДНК-маркеры</kwd></kwd-group><kwd-group xml:lang="en"><kwd>potato</kwd><kwd>genotype</kwd><kwd>disease</kwd><kwd>Phytophthora infestans</kwd><kwd>resistance</kwd><kwd>DNA markers</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">Королева А.К., Деревягина М.К., Бирюкова В.А., Поливанова О.Б. и др. 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