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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">10.32634/0869-8155-2025-395-06-87-93</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-3692</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>ЗООТЕХНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ZOOTECHNICS</subject></subj-group></article-categories><title-group><article-title>Генетические особенности декоративных пород кур по однонуклеотидным заменам в гене LCORL</article-title><trans-title-group xml:lang="en"><trans-title>Genetic variation in decorative chicken breeds based on single nucleotide substitutions in the LCORL gene</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8658-2026</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Позовникова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pozovnikova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марина Владимировна Позовникова, кандидат биологических наук, старший научный сотрудник лаборатории молекулярной генетики</p><p>Московское шоссе, 55А, Тярлево, Санкт-Петербург, 196601</p></bio><bio xml:lang="en"><p>Marina Vladimirovna Pozovnikova, Candidate of Biological Sciences, Senior Researcher at the Laboratory of Molecular Genetics</p><p>55А Moskovskoe shosse, Tyarlevo, St. Petersburg, 196601</p></bio><email xlink:type="simple">pozovnikova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4702-2736</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Митрофанова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mitrofanova</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ольга Викторовна Митрофанова, кандидат биологических наук, ведущий биолог лаборатории молекулярной генетики</p><p>Московское шоссе, 55А, Тярлево, Санкт-Петербург, 196601</p></bio><bio xml:lang="en"><p>Olga Viktorovna Mitrofanova, Candidate of Biological Sciences, Leading Biologist of the Laboratory of Molecular Genetics</p><p>55А Moskovskoe shosse, Tyarlevo, St. Petersburg, 196601</p></bio><email xlink:type="simple">mo1969@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт генетики и разведения сельскохозяйственных животных — филиал Федерального исследовательского центра животноводства «ВИЖ им. академика Л.К. Эрнста»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Research Institute of Farm Animal Genetics and Breeding — Branch of the L.K. Ernst Federal Research Center for Animal Husbandry</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>24</day><month>06</month><year>2025</year></pub-date><volume>0</volume><issue>6</issue><fpage>87</fpage><lpage>93</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Позовникова М.В., Митрофанова О.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Позовникова М.В., Митрофанова О.В.</copyright-holder><copyright-holder xml:lang="en">Pozovnikova M.V., Mitrofanova O.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/3692">https://www.vetpress.ru/jour/article/view/3692</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. Однонуклеотидные полиморфизмы (SNP) являются важными маркерами генетической изменчивости у кур, которые встречаются в геноме с высокой частотой. Идентификация и характеристика таких маркеров позволяют характеризовать породы с точки зрения их генетических особенностей. Цель данной работы — оценить полиморфизм в гене LCORL у декоративных пород кур на основе однонуклеотидных полиморфизмов.</p></sec><sec><title>Методы</title><p>Методы. Для проведения исследований были сформированы группы кур декоративных пород: новопавловская золотистая (n = 48), шелковая (n = 30), карликовый кохинхин (n = 30). С помощью метода ПЦР-ПДРФ анализировали участок гена LCORL по трем однонуклеотидным полиморфизмам (rs14491003, 236 G/T и 503A/G).</p></sec><sec><title>Результаты</title><p>Результаты. По rs14491003 полиморфизм установлен только в популяции кур новопавловская золотистая, где 83,3% особей имели генотип СС. По SNP 236G/T только в выборке кур шелковой породы выявлены три возможных варианта генотипов, а частота аллеля G и Т была 46,7% и 53,3% соответственно. По SNP 503A/G во всех выборках птицы определены три генотипа гена LCORL. Для кур шелковой породы установлена высокая частота аллея А (71,7%), а для кур пород новопавловская золотистая и карликовый кохинхин — аллеля G (69,8% и 60,0% соответственно). При анализе частот аллелей по всем полиморфным SNP не выявлено сдвига генетического равновесия (χ2 ˂ 3,84). Полученные результаты свидетельствуют о том, что куры декоративных пород имеют породные особенности, обусловленные полиморфными вариантами гена LCORL, что подтверждает функциональную роль данного гена в процессах формирования и роста костей скелета у кур различного направления селекции.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. Single nucleotide polymorphisms (SNPs) are important markers of genetic variation in chickens that occur in the genome with high frequency. The identification and characterization of such markers allow characterization of breeds in terms of their genetic traits. The aim of this work was to evaluate polymorphism in the LCORL gene in ornamental chicken breeds based on single nucleotide polymorphisms.</p></sec><sec><title>Methods</title><p>Methods. Groups of ornamental chicken breeds: Novopavlovskaya golden (n = 48), silk (n = 30), dwarf cochinchin (n = 30) were formed for the research. The LCORL gene region was analyzed by three single nucleotide polymorphisms (rs14491003, 236 G/T and 503A/G) using the PCR-PDRF method.</p></sec><sec><title>Results</title><p>Results.The rs14491003 polymorphism was detected only in the population of Novopavlovskaya golden hens, where 83.3% of individuals had the CC genotype. For SNP 236G/T only in the sample of silk breed hens three possible variants of genotypes were detected, and the frequency of G and T allele was 46.7% and 53.3% respectively. Three genotypes of the LCORL gene were identified by SNP 503A/G in all poultry samples. For silk breed chickens, high frequency was found for allele A (71.7%), and for Novopavlovsk golden and dwarf cochinchin breeds — allele G (69.8% and 60.0%, respectively). When analyzing allele frequencies for all polymorphic SNPs, no shift in genetic equilibrium was detected (χ2 ˂ 3.84). The obtained results indicate that chickens of ornamental breeds have breed peculiarities caused by polymorphic variants of the LCORL gene, which confirms the functional role of this gene in the processes of formation and growth of skeletal bones in chickens of different breeding directions.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>полиморфизм</kwd><kwd>генетические маркеры</kwd><kwd>Gallus gallus domesticus</kwd><kwd>SNP</kwd><kwd>новопавловская золотистая</kwd><kwd>карликовый кохинхин</kwd><kwd>шелковая</kwd></kwd-group><kwd-group xml:lang="en"><kwd>polymorphism</kwd><kwd>genetic markers</kwd><kwd>Gallus  gallus  domesticus</kwd><kwd>SNP</kwd><kwd>Novopavlovsk golden</kwd><kwd>Dwarf cochinchin</kwd><kwd>Silk</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа проведена в рамках выполнения научных исследований Министерства науки и высшего образования РФ по теме № 124020200114-7.</funding-statement><funding-statement xml:lang="en">The research was funded by the Ministry of Science and Higher Education of the Russian Federation by topic No. 124020200114-7.</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">Паронян И.А., Юрченко О.П., Вахрамеев А.Б., Макарова А.В. 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