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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Ecological genetics</journal-id><journal-title-group><journal-title xml:lang="en">Ecological genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Экологическая генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1811-0932</issn><issn publication-format="electronic">2411-9202</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">46405</article-id><article-id pub-id-type="doi">10.17816/ecogen46405</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Genetic basis of ecosystems evolution</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Генетические основы эволюции экосистем</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Assessment of variability of egg production traits based on analysis of SNP markers and search for traces of selection in the genome of Russian white chickens</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка вариабельности признаков яйценоскости на основе анализа SNP-маркеров и поиск следов селекции в геноме кур русской белой породы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4702-2736</contrib-id><contrib-id contrib-id-type="scopus">57188701229</contrib-id><contrib-id contrib-id-type="researcherid">S-5336-2018</contrib-id><contrib-id contrib-id-type="spin">4378-9500</contrib-id><name-alternatives><name xml:lang="en"><surname>Mitrofanova</surname><given-names>Olga V.</given-names></name><name xml:lang="ru"><surname>Митрофанова</surname><given-names>Ольга Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>candidate of biological sciences, scientific secretary</p></bio><bio xml:lang="ru"><p>кандидат биологических наук, ученый секретарь</p></bio><email>mo1969@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0210-9344</contrib-id><contrib-id contrib-id-type="scopus">57189759592</contrib-id><contrib-id contrib-id-type="researcherid">Т-4551-2018</contrib-id><contrib-id contrib-id-type="spin">8768-8906</contrib-id><name-alternatives><name xml:lang="en"><surname>Dementieva</surname><given-names>Natalia V.</given-names></name><name xml:lang="ru"><surname>Дементьева</surname><given-names>Наталия Викторовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Main Researcher, Laboratory of Molecular Genetics</p></bio><bio xml:lang="ru"><p>канд. биол. наук, ведущий научный сотрудник, лаборатория молекулярной генетики</p></bio><email>dementevan@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1618-6271</contrib-id><contrib-id contrib-id-type="spin">9226-6133</contrib-id><name-alternatives><name xml:lang="en"><surname>Fedorova</surname><given-names>Elena S.</given-names></name><name xml:lang="ru"><surname>Федорова</surname><given-names>Елена Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Senior Researcher, Department of Genetics, Breeding and Conservation of Poultry Genetic Resources</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник, отдел генетики, разведения и сохранения генетических ресурсов сельскохозяйственных птиц</p></bio><email>Fedorova816@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8658-2026</contrib-id><contrib-id contrib-id-type="scopus">57200383317</contrib-id><contrib-id contrib-id-type="spin">5441-6996</contrib-id><name-alternatives><name xml:lang="en"><surname>Pozovnikova</surname><given-names>Marina V.</given-names></name><name xml:lang="ru"><surname>Позовникова</surname><given-names>Марина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Senior Researcher, Laboratory of Molecular Genetics</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник, лаборатория молекулярной генетики</p></bio><email>pozovnikova@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4964-9938</contrib-id><contrib-id contrib-id-type="scopus">35749336500</contrib-id><contrib-id contrib-id-type="researcherid">K-9523-2017</contrib-id><contrib-id contrib-id-type="spin">6294-2400</contrib-id><name-alternatives><name xml:lang="en"><surname>Tyshchenko</surname><given-names>Valentina I.</given-names></name><name xml:lang="ru"><surname>Тыщенко</surname><given-names>Валентина Ивановна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Senior Researcher, Laboratory of Molecular Genetics</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник, лаборатория молекулярной генетики</p></bio><email>tinatvi@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6434-6287</contrib-id><contrib-id contrib-id-type="researcherid">AAR-5595-2020</contrib-id><contrib-id contrib-id-type="spin">3547-1009</contrib-id><name-alternatives><name xml:lang="en"><surname>Shcherbakov</surname><given-names>Yuriy S.</given-names></name><name xml:lang="ru"><surname>Щербаков</surname><given-names>Юрий Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Researcher, Laboratory of Molecular Genetics</p></bio><bio xml:lang="ru"><p>младший научный сотрудник, лаборатория молекулярной генетики</p></bio><email>yura.10.08.94.94@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3658-5886</contrib-id><contrib-id contrib-id-type="scopus">56784261300</contrib-id><contrib-id contrib-id-type="researcherid">ААО-9837-2020</contrib-id><contrib-id contrib-id-type="spin">4609-8783</contrib-id><name-alternatives><name xml:lang="en"><surname>Plemyashov</surname><given-names>Kirill V.</given-names></name><name xml:lang="ru"><surname>Племяшов</surname><given-names>Кирилл Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr Sci., Main Researcher, Reproduction Department</p></bio><bio xml:lang="ru"><p>д-р биол. наук, главный научный сотрудник, отдел воспроизводства</p></bio><email>kirill060674@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian Research Institute of Farm Animal Genetics and Breeding – Branch of the L.K. Ernst Federal Science Center for Animal Husbandry</institution></aff><aff><institution xml:lang="ru">Всероссийский научно-исследовательский институт генетики и разведения сельскохозяйственных животных — филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр животноводства — ВИЖ им. академика Л.К. Эрнста»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Russian Research Institute of Farm Animal Genetics and Breeding - Branch of the L.K. Ernst Federal Science Center for Animal Husbandry</institution></aff><aff><institution xml:lang="ru">Всероссийский научно-исследовательский институт генетики и разведения сельскохозяйственных животных — филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр животноводства — ВИЖ им. академика Л.К. Эрнста»</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2020-11-17" publication-format="electronic"><day>17</day><month>11</month><year>2020</year></pub-date><pub-date date-type="pub" iso-8601-date="2020-12-12" publication-format="electronic"><day>12</day><month>12</month><year>2020</year></pub-date><volume>18</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>423</fpage><lpage>432</lpage><history><date date-type="received" iso-8601-date="2020-10-05"><day>05</day><month>10</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-11-17"><day>17</day><month>11</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Mitrofanova O., Dementieva N., Fedorova E.S., Pozovnikova M., Tyshchenko V., Scherbakov Y., Plemyashov K.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, ООО "Эко-вектор"</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Mitrofanova O., Dementieva N., Fedorova E.S., Pozovnikova M., Tyshchenko V., Scherbakov Y., Plemyashov K.</copyright-holder><copyright-holder xml:lang="ru">ООО "Эко-вектор"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2023-12-12"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/ecolgenet/article/view/46405">https://journals.eco-vector.com/ecolgenet/article/view/46405</self-uri><abstract xml:lang="en"><p><bold>Objective.</bold> To assess the variability of egg production traits for nine SNPs, to search for traces of selection in the genome of Russian white chickens based on ROH patterns.</p> <p><bold>Methods.</bold> The material for the study was DNA isolated from the blood of Russian white chickens (<italic>n</italic> = 141). Nine SNPs associated with egg production at <italic>p</italic> &lt; 5.16 · 10<sup>–5</sup> according to GWAS data were selected for analysis. The frequencies of alleles and genotypes, the relationship between genotypes and characteristics of egg production were calculated, and ROH patterns were identified.</p> <p><bold>Results.</bold> Significant differences between genotypes were found in terms of age of laying the first egg (<italic>p</italic> &lt; 0.005) and egg weight (<italic>p</italic> &lt; 0.05). The genomic regions surrounding the target SNPs were analyzed according to the distribution of homozygous regions in them.</p> <p><bold>Conclusions.</bold> The substitutions rs317565390 and rs16625488 located in the 4.8–10.2 Mb region on chromosome 8 showed polymorphism, despite the fact that homozygous loci in this region of the genome are found in 58% of animals. For most SNPs, the prevalence of the frequency of one of the alleles was observed. As a cluster of increased selection pressure, a chick genome region in the 4.8–10.2 Mb region on chromosome 8 was identified.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель. </bold>Оценить вариабельность признаков яйценоскости по девяти SNP, провести поиск следов селекции в геноме кур русской белой породы на основе ROH-паттернов.</p> <p><bold>Методы. </bold>Материалом для исследования послужила ДНК, выделенная из крови кур русской белой породы (<italic>n</italic> = 141). Для анализа были отобраны девять SNP, ассоциированные с яйценоскостью при <italic>р</italic> &lt; 5,16 · 10<sup>–5</sup>, по данным GWAS. Рассчитаны частоты аллелей и генотипов, взаимосвязь между генотипами и признаками яйценоскости, идентифицированы ROH-паттерны.</p> <p><bold>Результаты.</bold> Достоверные различия между генотипами обнаружены по признаку возраста снесения первого яйца (<italic>р</italic> &lt; 0,005) и массы яйца (<italic>р</italic> &lt; 0,05). Проанализированы геномные регионы, окружающие целевые SNPs, по распределению в них гомозиготных районов.</p> <p><bold>Выводы.</bold> По заменам rs317565390 и rs16625488, расположенным в регионе 4,8–10,2 Mb на хромосоме 8, отмечен полиморфизм, несмотря на то, что гомозиготные локусы в этом участке генома встречаются у 58 % животных. По большинству SNPs наблюдали преобладание частоты одного из аллелей. Как кластер повышенного селекционного давления выявлен участок генома кур в регионе 4,8–10,2 Mb на хромосоме 8.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Gallus gallus</kwd><kwd>age of first egg laying</kwd><kwd>egg weight</kwd><kwd>local breeds</kwd><kwd>ROH patterns</kwd><kwd>polymorphic loci</kwd><kwd>SNP</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Gallus gallus</kwd><kwd>возраст снесения первого яйца</kwd><kwd>масса яйца</kwd><kwd>локальные породы</kwd><kwd>ROH-паттерны</kwd><kwd>полиморфные локусы</kwd><kwd>SNP</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский фонд фундаментальных исследований</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Foundation for Basic Research</institution></institution-wrap></funding-source><award-id>18-016-00114</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Wolc A, Arango J, Settar P, et al. 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