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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">10.32634/0869-8155-2023-376-11-41-45</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpress-2853</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 И ВЕТЕРИНАРИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ZOOTECHNICS AND VETERINARY MEDICINE</subject></subj-group></article-categories><title-group><article-title>Изучение видовых особенностей гистологической структуры длиннейшей мышцы спины у животных рода Ovis</article-title><trans-title-group xml:lang="en"><trans-title>Study of the specific features in the histological structure of the longissimus muscle dorsi in animals of the genus Ovis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7191-3550</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волкова</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Volkova</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Александровна Волкова, доктор биологических наук, главный научный сотрудник, руководитель лаборатории клеточной инженерии</p><p>пос. Дубровицы, 60, Подольск, Московская обл., 142132</p><p> </p></bio><bio xml:lang="en"><p>Natalia Alexandrovna Volkova, Doctor of Biological Sciences, Chief Researcher, Head of the Cell Engineering Laboratory</p><p>60 Dubrovitsy, Podolsk, Moscow region, 142132</p></bio><email xlink:type="simple">natavolkova@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9407-3686</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волкова</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Volkova</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Людмила Александровна Волкова, кандидат биологических наук, научный сотрудник лабораториимикробиологии</p><p>пос. Дубровицы, 60, Подольск, Московская обл., 142132</p></bio><bio xml:lang="en"><p>Ludmila Alexandrovna Volkova, Candidate of Biological Sciences, Researcher at the Microbiology Laboratory</p><p>60 Dubrovitsy, Podolsk, Moscow region, 142132</p></bio><email xlink:type="simple">ludavolkova@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральный исследовательский центр животноводства – ВИЖ им. академика Л.К. Эрнста</institution><country>Россия</country></aff><aff xml:lang="en"><institution>L.K. Ernst Federal Research Center for Animal Husbandry</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>24</day><month>11</month><year>2023</year></pub-date><volume>0</volume><issue>11</issue><fpage>41</fpage><lpage>45</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Волкова Н.А., Волкова Л.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Волкова Н.А., Волкова Л.А.</copyright-holder><copyright-holder xml:lang="en">Volkova N.A., Volkova L.A.</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/2853">https://www.vetpress.ru/jour/article/view/2853</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. Межвидовая гибридизация домашних животных с дикими родственными видами рассматривается как одно из перспективных направлений в животноводстве в рамках повышения качества и нутриентного биоразнообразия животноводческой продукции. В статье представлены результаты исследований видовых особенностей гистологической структуры длиннейшей мышцы спины у животных рода Ovis разных генотипов.</p></sec><sec><title>Методы</title><p>Методы. Объектом исследований являлись овцы романовской породы и межвидовые гибриды домашних овец (романовская порода) с архаром. Проведены гистологические исследования длиннейшей мышцы спины животных в возрасте 12 месяцев в сравнительном аспекте. Изучены толщина и площадь мышечных волокон, мышечных пучков, количество мышечных волокон на единицу площади среза.</p></sec><sec><title>Результаты</title><p>Результаты. Выявлены различия по ряду морфометрических показателей основных структурных единиц длиннейшей мышцы спины животных в зависимости от генотипа. У гибридных животных относительно овец романовской породы установлено снижение показателей толщины и площади мышечных волокон на 12% и 25% соответственно (р &lt; 0,01). Показано повышение числа мышечных волокон на 1 мм2 среза и снижение доли соединительной ткани в структуре длиннейшей мышцы спины у межвидовых гибридов по сравнению с аналогичными показателями овец романовской породы. Данные биологические особенности гибридных животных следует учитывать при их разведении, селекции и использовании для получения мяса и мясной продукции.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. Interspecific hybridization of domestic animals with wild related species is considered as one of the promising directions in animal husbandry in the framework of improving the quality and nutrient biodiversity of livestock products. The article shows the research results of the specific features in the histological structure of the longissimus muscle dorsi in animals of the genus Ovis with different genotypes.</p></sec><sec><title>Methods</title><p>Methods. The object of research was sheep of the Romanov breed and interspecific hybrids of domestic sheep (Romanov breed) with argali. Histological studies of the longissimus dorsi muscle of purebred and hybrid animals at the age of 12 months were carried out in a comparative aspect. The thickness and area of muscle fibers, muscle bundles, the number of muscle fibers per unit cross-sectional areas were studied.</p></sec><sec><title>Results</title><p>Results. Differences in a number of morphometric parameters in the main structural units of the longissimus dorsi muscle in hybrid animals depending on the genotype were revealed. In hybrid animals, in comparison with purebred sheep, a decrease in the thickness and area of muscle fibers by 12% and 25% was found (p &lt; 0.01). An increase in the number of muscle fibers per 1 mm2 of the cut and a decrease in the proportion of connective tissue in the structure of the longissimus dorsi muscle in interspecific hybrids were shown in comparison with those in sheep of the Romanov breed (p &lt; 0.01). These biological features of hybrid animals should be taken into account when breeding, selecting and using them to obtain meat and meat products.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>овцы</kwd><kwd>межвидовые гибриды</kwd><kwd>романовская порода</kwd><kwd>архар</kwd><kwd>длиннейшая мышца спины</kwd></kwd-group><kwd-group xml:lang="en"><kwd>sheep</kwd><kwd>interspecific hybrids</kwd><kwd>Romanov breed</kwd><kwd>argali</kwd><kwd>longissimus dorsi muscle</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Министерства науки и высшего образования РФ (тема № 121052600350-9).</funding-statement><funding-statement xml:lang="en">This work was supported financially by the Ministry of Science and Higher Education of the Russian Federation (subject № 121052600350-9).</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">Yadav A. et al. 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