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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">Vestnik of the Far East Branch of the Russian Academy of Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Vestnik of the Far East Branch of the Russian Academy of Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Дальневосточного отделения Российской академии наук</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-7698</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">688934</article-id><article-id pub-id-type="doi">10.31857/S0869769825030118</article-id><article-id pub-id-type="edn">PNNFZF</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Agricultural Sciences</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Сельскохозяйственные науки</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">Changes in breeding and genetic properties of the Sakhalin population of the Holstein breed over the period of long-term breeding</article-title><trans-title-group xml:lang="ru"><trans-title>Изменения селекционно-генетических свойств сахалинской популяции голштинской породы за период многолетнего разведения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4366-7628</contrib-id><name-alternatives><name xml:lang="en"><surname>Kuznetsov</surname><given-names>Victor M.</given-names></name><name xml:lang="ru"><surname>Кузнецов</surname><given-names>Виктор Макарович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Sciences in Agriculture, Leading Researcher</p></bio><bio xml:lang="ru"><p>доктор сельскохозяйственных наук, ведущий научный сотрудник</p></bio><email>vik79344625@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8998-2826</contrib-id><name-alternatives><name xml:lang="en"><surname>Revina</surname><given-names>Galina B.</given-names></name><name xml:lang="ru"><surname>Ревина</surname><given-names>Галина Борисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Candidate of Sciences in Biology, Senior Researcher</p></bio><bio xml:lang="ru"><p>кандидат биологических наук, старший научный сотрудник</p></bio><email>sakhnii_sakhalin@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Sakhalin Scientific Research Institute of Agriculture – VIR Branch</institution></aff><aff><institution xml:lang="ru">Сахалинский научно-исследовательский институт сельского хозяйства – филиал ВИР</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-09-04" publication-format="electronic"><day>04</day><month>09</month><year>2025</year></pub-date><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>114</fpage><lpage>125</lpage><history><date date-type="received" iso-8601-date="2025-08-10"><day>10</day><month>08</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-08-10"><day>10</day><month>08</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-7698/article/view/688934">https://journals.eco-vector.com/0869-7698/article/view/688934</self-uri><abstract xml:lang="en"><p>As a result of the conducted research, the breeding and genetic mechanism of the formation of productive traits in cows of the Sakhalin population has been studied. The modern breed group combines four related populations – American, Canadian, Japanese and Sakhalin. Studies have shown that a limited population limits fertility, does not show heterosis, and reduces adaptability in subsequent generations. The main breeding and genetic parameters of breeding herds have been determined. The correlation coefficient between the milk yield of cows for 305 days of the first lactation and the service period was –0,227±0,013, the coefficient of linear regression, respectively (b<sub>yx</sub> = 0,45±0,033, F test 5.2). A positive correlation was found between the milk yield of full-aged cows over 305 days of lactation and the number of retired cows in fertility (r = +0,52±0,012).</p></abstract><trans-abstract xml:lang="ru"><p>В результате проведенных исследований изучен селекционно-генетический механизм формирования продуктивных признаков у коров сахалинской популяции. Современная породная группа сочетает в себе четыре родственных между собой популяции – американскую, канадскую, японскую и сахалинскую. Исследования показали, что популяция ограниченной численности ограничивает фертильность, не проявляет гетерозиса и снижает адаптивность в последующих поколениях. Определены основные селекционно-генетические параметры племенных стад. Коэффициент корреляции между удоем коров за 305 дней первой лактации и сервис-периодом составил –0,227±0,013, коэффициент линейной регрессии соответственно (b<sub>yx</sub> = 0,45±0,033, F тест 5,2). Между удоем полновозрастных коров за 305 дней лактации и количеством выбывших коров по плодовитости выявлена положительная коррелятивная связь (r = +0,52±0,012).</p></trans-abstract><kwd-group xml:lang="en"><kwd>breeding and genetic parameters of herds</kwd><kwd>sakhalin population of Holstein breed</kwd><kwd>milk productivity</kwd><kwd>reproducibility</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>селекционно-генетические параметры стад</kwd><kwd>сахалинская популяция голштинской породы</kwd><kwd>молочная продуктивность</kwd><kwd>воспроизводительная способность</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования РФ по проекту FGEM-2025-0003.</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation under the project FGEM-2025-0003.</institution></institution-wrap></funding-source></award-group><funding-statement xml:lang="en">The work was carried out in accordance with the State Assignment of the Ministry of Science and Higher Education of the Russian Federation under the project FGEM-2025-0003.</funding-statement><funding-statement xml:lang="ru">Работа выполнена в соответствии с государственным заданием Министерства науки и высшего образования Российской Федерации по проекту FGEM-2025-0003.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Kuznetsov V.M. 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