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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">vetpress</journal-id><journal-title-group><journal-title xml:lang="ru">Аграрная наука</journal-title><trans-title-group xml:lang="en"><trans-title>Agrarian science</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-8155</issn><issn pub-type="epub">2686-701X</issn><publisher><publisher-name>Редакция журнала "Аграрная наука"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32634/0869-8155-2025-400-11-91-97</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-3906</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>АГРОНОМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>AGRONOMY</subject></subj-group></article-categories><title-group><article-title>Источники вертикальной устойчивости льна масличного к фузариозному увяданию</article-title><trans-title-group xml:lang="en"><trans-title>Sources of vertical resistance of oilseed flax to fusarium wilt</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>Рожмина</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rozhmina</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Александровна Рожмина, доктор биологических наук, старший научный сотрудник, главный научный сотрудник, заведующая лабораторией селекционных технологий </p><p> Комсомольский пр-т, 17/56, Тверь, 172002 </p></bio><bio xml:lang="en"><p> Tatyana Aleksandrovna Rozhmina, Doctor of Biological Sciences, Senior Researcher, Chief Researcher, Head of the Laboratory of Selection Technologies </p><p> 17/56 Komsomolsky Prospect, Tver, 172002 </p></bio><email xlink:type="simple">len_rozhmina@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>Мясникова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Myasnikova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Анастасия Владимировна Мясникова, аспирант, инженер-исследователь </p><p> Комсомольский пр-т, 17/56, Тверь, 172002 </p></bio><bio xml:lang="en"><p> Anastasia Vladimirovna Myasnikova, Postgraduate Student, Research Engineer </p><p> 17/56 Komsomolsky Prospect, Tver, 172002 </p></bio><email xlink:type="simple">a.myasnikova.trk@fnclk.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>Пролётова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Proletova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Наталья Викторовна Пролётова, кандидат биологических наук, старший научный сотрудник, ведущий научный сотрудник, заведующая отделом селекционных и биотехнологий </p><p> Комсомольский пр-т, 17/56, Тверь, 172002 </p></bio><bio xml:lang="en"><p> Natalia Viktorovna Proletova, Candidate of Biological Sciences, Senior Researcher, Leading Researcher, Head Department of Breeding and Biotechnology </p><p> 17/56 Komsomolsky Prospect, Tver, 172002 </p></bio><email xlink:type="simple">len_rozhmina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный научный центр лубяных культур</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal Research Center for Вast Fiber Сrops</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>19</day><month>11</month><year>2025</year></pub-date><volume>0</volume><issue>11</issue><fpage>91</fpage><lpage>97</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рожмина Т.А., Мясникова А.В., Пролётова Н.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Рожмина Т.А., Мясникова А.В., Пролётова Н.В.</copyright-holder><copyright-holder xml:lang="en">Rozhmina T.A., Myasnikova A.V., Proletova N.V.</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://www.vetpress.ru/jour/article/view/3906">https://www.vetpress.ru/jour/article/view/3906</self-uri><abstract><p>Актуальность. Фузариозное увядание — наиболее известное вредоносное заболевание льна. Изменение климата, стремительное расширение площадей под масличным льном в стране вызывают опасность эпифитотий данного заболевания. Выведение сортов с различными высокоэффективными генами устойчивости позволит обеспечить надежную защиту от патогена.Методы. Фитопатологическая оценка устойчивости к фузариозному увяданию выполнялась в условиях вегетационного опыта и климатической камеры (температура воздуха 26 °С). Селективные фоны созданы с помощью чистой культуры возбудителя Fusarium oxysporum f. lini — изолята 39 и искусственной популяции патогена. Внесение инфекции в почву осуществляли из расчета 400 г на ящик размером 50 x 85 x 20 см.Результаты. Проведен скрининг 60 коллекционных образцов льна масличного, выявлены 35 источников устойчивости к фузариозному увяданию, которые проявили высокий уровень резистентности (81,2–100%) на селективных фонах, что указывает на наличие у них высокоэффективных R-генов к данному заболеванию. Установлено усиление вирулентности изолята 39 при повышенной температуре воздуха (26 °С) в период «всходы — елочка», что привело к снижению экспрессии генов у 37,1% выделившихся устойчивых образцов (пораженность 39,0–83,4%), высокий уровень устойчивости сохранили 22 генотипа: Уральский, Легур, Altess, Raciol, BS-12, Arny и др. С помощью фитопатологического тестирования образцов льна с измененным жирнокислотным составом AGT 422, AGT 987, Raciol (среднелиноленовые), AGT 427 и AGT 1538 (низколиноленовые) выявлены различия в реакции их на заражение 13 изолятами возбудителя, что позволяет сделать предположение о наличии у них неидентичных генов вертикальной устойчивости к патогену.</p></abstract><trans-abstract xml:lang="en"><p>Relevance. Fusarium wilt is the most harmful disease of flax. Climate change and rapid expansion of areas under oil flax in the country pose a risk of epiphytoties of this disease. Breeding varieties with various highly effective resistance genes will provide reliable protection against the pathogen.Methods. Phytopathological assessment of resistance to fusarium wilt was performed under the conditions of a vegetation experiment and a climate chamber (air temperature 26 °C). Selective backgrounds were created using a pure culture of the causative agent Fusarium oxysporum f. lini — isolate 39 and an artificial population of the pathogen. The infection was introduced into the soil at the rate of 400 g per 50 x 85 x 20 cm box.Results. Screening of 60 collection samples of flaxseed was carried out, 35 sources of resistance to fusarium wilt were identified, which showed a high level of resistance (81.2–100%) on selective backgrounds, which indicates the presence of highly effective R-genes for this disease. An increase in the virulence of isolate 39 was established at elevated air temperature (26 °C) during the germination-herringbone period, which led to a decrease in gene expression in 37.1% of the isolated resistant samples (damage 39.0–83.4%), a high level of resistance was retained by 22 genotypes: Uralsky, Legur, Altess, Raciol, BS-12, Arny, etc. Phytopathological testing of flax samples with modified fatty acid composition AGT 422, AGT 987, Raciol (medium-linolenic), AGT 427 and AGT 1538 (low-linolenic) revealed differences in their response to infection with 13 isolates of the pathogen, which suggests that they have non-identical vertical resistance genes to the pathogen.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Linum usitatissimum L.</kwd><kwd>Fusarium oxysporum f. lini</kwd><kwd>источники</kwd><kwd>фитопатологический тест</kwd><kwd>моноизолят</kwd><kwd>вертикальная устойчивость</kwd><kwd>возбудитель</kwd><kwd>коллекционный образец</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Linum usitatissimum L.</kwd><kwd>Fusarium oxysporum f. lini</kwd><kwd>genetic sources</kwd><kwd>phytopathological test</kwd><kwd>monoisolate</kwd><kwd>vertical resistance</kwd><kwd>pathogen</kwd><kwd>collection samples</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования выполнены в рамках ФНТП масличных культур ФГБНУ «Федеральный научный центр лубяных культур», тема № FGSS-2025-0002.</funding-statement><funding-statement xml:lang="en">The research was carried out within the framework of the FNTP of oilseeds Federal State Budgetary Budgetary Institution "Federal Scientific Center of Bast Crops", topic No. FGSS-2025-0002.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Косых Л.А. 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