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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">izvestiiatimacad</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Тимирязевской сельскохозяйственной академии</journal-title><trans-title-group xml:lang="en"><trans-title>IZVESTIYA OF TIMIRYAZEV AGRICULTURAL ACADEMY</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-342X</issn><publisher><publisher-name>ФГБОУ ВО РГАУ-МСХА имени К.А. Тимирязева</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26897/0021-342X-2022-2-79-87</article-id><article-id custom-type="elpub" pub-id-type="custom">izvestiiatimacad-248</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, БИОЛОГИЯ И ВЕТЕРИНАРНАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>LIVESTOCK BREEDING, BIOLOGY AND VETERINARY MEDICINE</subject></subj-group></article-categories><title-group><article-title>Криорезистентность спермы жеребцов в разные месяцы года</article-title><trans-title-group xml:lang="en"><trans-title>Cryoresistance of stallion sperm in different months of the year</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткачев</surname><given-names>Александр Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Tkachev</surname><given-names>Aleksandr V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ткачев Александр Владимирович, преподаватель, д-р с.-х. наук, старший научный сотрудник</p><p>127434, г. Москва, ул. Прянишникова, 14, стр. 6, Россия</p><p>тел.: (915) 604–75–10</p></bio><bio xml:lang="en"><p>Aleksandr V. Tkachev, DSc (Ag), Senior Research Associate, Lecturer</p><p>14, building 6, Pryanishnikova Str., Moscow, 127434, Russian Federation</p><p>phone: (915) 604–75–10</p></bio><email xlink:type="simple">sasha_sashaola@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Коровин</surname><given-names>Юрий Иванович</given-names></name><name name-style="western" xml:lang="en"><surname>Korovin</surname><given-names>Yuriy I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Коровин Юрий Иванович, директор, канд. техн. наук, профессор</p><p>127434, г. Москва, ул. Прянишникова, 14, стр. 6, Россия</p><p>тел.: (915) 604–75–10</p></bio><bio xml:lang="en"><p>Yuriy I. Korovin, PhD (Eng), Professor, Director</p><p>14, building 6, Pryanishnikova Str., Moscow, 127434, Russian Federation</p><p>phone: (915) 604–75–10</p></bio><email xlink:type="simple">yura.korovin.61@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткачева</surname><given-names>Ольга Леонидовна</given-names></name><name name-style="western" xml:lang="en"><surname>Tkacheva</surname><given-names>Olga L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ткачева Ольга Леонидовна, преподаватель, канд. с.-х. наук</p><p>127434, г. Москва, ул. Прянишникова, 14, стр. 6, Россия</p><p>тел.: (915) 604–75–10</p></bio><bio xml:lang="en"><p>Olga L. Tkacheva, PhD (Ag), Lecturer</p><p>14, building 6, Pryanishnikova Str., Moscow, 127434, Russian Federation</p><p>phone: (915) 604–75–10</p></bio><email xlink:type="simple">sasha_sashaola@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Технологический колледж РГАУ-МСХА им. К.А. Тимирязева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Technological College of Russian State Agrarian University – Moscow Timiryazev Agricultural Academy</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>25</day><month>12</month><year>2022</year></pub-date><volume>0</volume><issue>2</issue><fpage>79</fpage><lpage>87</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ткачев А.В., Коровин Ю.И., Ткачева О.Л., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ткачев А.В., Коровин Ю.И., Ткачева О.Л.</copyright-holder><copyright-holder xml:lang="en">Tkachev A.V., Korovin Y.I., Tkacheva O.L.</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://izvestiia.timacad.ru/jour/article/view/248">https://izvestiia.timacad.ru/jour/article/view/248</self-uri><abstract><p>Известно, что сезонность репродуктивной функции гораздо более выражена у кобыл, чем у жеребцов. Кобыла переживает период анэструса осенью и зимой, в то время как сперматогенез у жеребцов продолжается в течение всего года. Поэтому актуальными являются исследования криорезистентности спермы жеребцов в разные месяцы года. Целью исследования было изучение криорезистентности спермы жеребцов в разные месяцы года при криоконсервировании генетического материала в период интенсивного племенного использования производителей. Криорезистентность спермы жеребцов при их интенсивном племенном использовании была наилучшей с сентября по декабрь в период полового покоя. Наибольшая переживаемость спермиев была в декабре месяце, что на 0,44% больше, чем в октябре; на 5,12% больше, чем в ноябре; на 7,62% больше (Р&lt;0,05), чем в сентябре; на 20,53% (Р&lt;0,01) больше, чем в январе; на 27,3% (Р&lt;0,01) больше, чем в феврале; на 52,7% (Р&lt;0,001) больше, чем в марте; на 137,9% (Р&lt;0,05) больше, чем в апреле; на 34,12% (Р&lt;0,001) больше, чем в мае; на 23,5% (Р&lt;0,001) больше, чем в июне; на 59,7% больше (Р&lt;0,001), чем в июле. Переживаемость спермиев после оттаивания в термостате при 37°C менее 3 ч наблюдалась в марте, апреле и июле. Наименьшая подвижность спермиев после размораживания наблюдалась в апреле, что на 36,4% меньше (Р&lt;0,001), чем в июле; на 38,6% (Р&lt;0,001) меньше, чем в мае; на 45,12% меньше (Р&lt;0,001), чем в июне; на 50,1% меньше (Р&lt;0,001), чем в январе; на 52,6% меньше (Р&lt;0,001), чем в феврале; на 43,75% меньше (Р&lt;0,001), чем в марте; на 53,8% меньше (Р&lt;0,001), чем в сентябре; на 55% меньше (Р&lt;0,001), чем в октябре; на 54,4% меньше (Р&lt;0,001), чем в ноябре; на 54,1% меньше (Р&lt;0,001), чем в декабре. Исходя из полученных данных о подвижности деконсервированных спермодоз, мы вправе ожидать наибольшую оплодотворяющую способность от того генетического материала, который заготовлен с сентября по декабрь.</p></abstract><trans-abstract xml:lang="en"><p>It is known that the seasonality of reproductive function is much more pronounced in mares than in stallions. The mare goes through an anestrus period in autumn and winter, while spermatogenesis in stallions continues throughout the year. Therefore, studies of cryoresistance of stallion sperm in different months of the year are relevant. The aim of the study was to study the cryoresistance of stallion sperm in different months of the year when creating cryopreservation of genetic material with intensive breeding use of sires. The cryoresistance of the sperm of stallions with their intensive breeding use was the best from September to December during sexual rest. The highest incidence of sperm was in December, which is 0.44% more than in October, 5.12% more than in November, 7.62% more (P&lt;0.05) than in September, 20.53% more (P&lt;0.01) than in January, 27.3% more (P&lt;0.01) compared to February, 52.7% more (P&lt;0.001) than in March, 137.9% more (P&lt;0.05) than in April, 34.12% more (P&lt;0.001) than in May, 23.5% more (P&lt;0.001) than in June and 59.7% more (P&lt;0.001) than in July. The survivability of sperms after thawing in a thermostat at 37°C for less than 3 hours was observed in March, April and July. The lowest sperm motility after defrosting was observed in April, which is 36.4% less (P&lt;0.001) than in July, 38.6% less (P&lt;0.001) than in May, 45.12% less (P&lt;0.001) than in June, 50.1% less (P&lt;0.001) than in in January, 52.6% less (P&lt;0.001) than in February, 43.75% less (P&lt;0.001) than in March, 53.8% less (P&lt;0.001) than in September, 55% less (P&lt;0.001) than in October, 54.4% less (P&lt;0.001) than in November and 54.1% less (P&lt;0.001) than in December. Based on the data obtained on the mobility of deconserved sperm doses, we mat expect the highest fertility from the genetic material that is harvested from September to December.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>криорезистентность эякулятов</kwd><kwd>физиологические особенности</kwd><kwd>сперма жеребцов</kwd><kwd>месяц года</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ejaculate cryoresistance</kwd><kwd>physiological features</kwd><kwd>stallion sperm</kwd><kwd>month of the year</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Aurich J. Efficiency of Semen Cryopreservation in Stallions / J. Aurich, J. Kuhl, А. Tichy, C. Aurich // Animals. – 2020. – № 10. – Р. 1033 (doi:10.3390/ani10061033).</mixed-citation><mixed-citation xml:lang="en">Aurich J., Kuhl J., Tichy А., Aurich C. Efficiency of Semen Cryopreservation in Stallions. Animals. 2020; 10: 1033. 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