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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="brief-report" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">27528</article-id><article-id pub-id-type="doi">10.32607/actanaturae.27528</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Short communications</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Краткие сообщения</subject></subj-group><subj-group subj-group-type="article-type"><subject>Short Communication</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Intergeneric introgression enhances the adaptive potential of nine-spined stickleback (<italic>Pungitius pungitius</italic>)</article-title><trans-title-group xml:lang="ru"><trans-title>Межродовая геномная интрогрессия повышает адаптивный потенциал у девятииглой колюшки (<italic>Pungitius pungitius</italic>)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nedoluzhko</surname><given-names>А. V.</given-names></name><name xml:lang="ru"><surname>Недолужко</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nedoluzhko@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharko</surname><given-names>F. S.</given-names></name><name xml:lang="ru"><surname>Шарко</surname><given-names>Ф. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nedoluzhko@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rastorguev</surname><given-names>S. М.</given-names></name><name xml:lang="ru"><surname>Расторгуев</surname><given-names>С. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>rastorgueff@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">European University at St. Petersburg</institution></aff><aff><institution xml:lang="ru">Европейский Университет в Санкт-Петербурге</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">National Research Center “Kurchatov Institute”</institution></aff><aff><institution xml:lang="ru">НИЦ «Курчатовский институт»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Pirogov Russian National Research Medical University of the Ministry of Health of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет им. Н.И. Пирогова Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-04-22" publication-format="electronic"><day>22</day><month>04</month><year>2025</year></pub-date><volume>17</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>110</fpage><lpage>113</lpage><history><date date-type="received" iso-8601-date="2024-10-03"><day>03</day><month>10</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-01-30"><day>30</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Nedoluzhko А.V., Sharko F.S., Rastorguev S.М.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Недолужко А.В., Шарко Ф.С., Расторгуев С.М.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Nedoluzhko А.V., Sharko F.S., Rastorguev S.М.</copyright-holder><copyright-holder xml:lang="ru">Недолужко А.В., Шарко Ф.С., Расторгуев С.М.</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/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/27528">https://actanaturae.ru/2075-8251/article/view/27528</self-uri><abstract xml:lang="en"><p>Over the past decades, number of evidences has accumulated that demonstrates the importance of genomic introgression between relatively distant eukaryote species, including the introgression of teleost fish species; the three-spined stickleback (<italic>Gasterosteus aculeatus</italic>) and the nine-spined stickleback (<italic>Pungitius pungitius</italic>). The whole-genome datasets of both teleost species give reasons for suggesting that the marine population of nine-spined stickleback increases its adaptive potential to the marine environment through introgression with the anadromous three-spined stickleback. These findings demand a reinterpreting of the mechanisms of evolution towards a process in which organisms acquire new traits not only through long-term accumulation and selection of spontaneous mutations, but also via introgression from other species and ecological forms.</p></abstract><trans-abstract xml:lang="ru"><p>За последние десятилетия проведено значительное количество наблюдений, демонстрирующих важность геномной интрогрессии между относительно отдаленными видами позвоночных животных. В том числе, интрогрессия описана между двумя видами костистых рыб – трехиглой (<italic>Gasterosteus aculeatus</italic>) и девятииглой (<italic>Pungitius pungitius</italic>) колюшками. Полученные ранее полногеномные данные для обоих видов позволяют предположить, что морские популяции девятииглой колюшки увеличивают свой адаптивный потенциал к морской среде благодаря интрогрессивной гибридизации с проходной трехиглой колюшкой. Эти результаты требуют переосмысления механизмов эволюционного процесса, при которых новые признаки у организмов появляются не только путем долгого накопления случайных мутаций, но и через заимствования у других видов и экологических форм.</p></trans-abstract><kwd-group xml:lang="en"><kwd>introgression</kwd><kwd>hybridization</kwd><kwd>nine-spined stickleback</kwd><kwd>Pungitius pungitius</kwd><kwd>adaptation</kwd><kwd>three-spined stickleback</kwd><kwd>Gasterosteus aculeatus</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>интрогрессия</kwd><kwd>гибридизация</kwd><kwd>девятииглая колюшка</kwd><kwd>Pungitius pungitius</kwd><kwd>адаптация</kwd><kwd>трехиглая колюшка</kwd><kwd>Gasterosteus aculeatus</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap></funding-source><award-id>24-76-10054</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hu L., Yang R., Wang Y.-H., Gong X. // AoB PLANTS. 2021. 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