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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Forestry Engineering Journal</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Forestry Engineering Journal</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Лесотехнический журнал</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2222-7962</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">86019</article-id>
   <article-id pub-id-type="doi">10.34220/issn.2222-7962/2024.2/1</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Естественные науки и лес</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>NATURAL SCIENCES AND FOREST</subject>
    </subj-group>
    <subj-group>
     <subject>Естественные науки и лес</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Theoretical prerequisites for the creation and some practical results of studying the birch gene pool in the Voronezh region</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>ТЕОРЕТИЧЕСКИЕ ПРЕДПОСЫЛКИ СОЗДАНИЯ И НЕКОТОРЫЕ ПРАКТИЧЕСКИЕ РЕЗУЛЬТАТЫ ИЗУЧЕНИЯ ГЕНОФОНДА БЕРЁЗЫ В ВОРОНЕЖСКОЙ ОБЛАСТИ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Исаков</surname>
       <given-names>Игорь Юрьевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Isakov</surname>
       <given-names>Igor Yur'evich</given-names>
      </name>
     </name-alternatives>
     <email>isakov@vmail.ru</email>
     <bio xml:lang="ru">
      <p>кандидат сельскохозяйственных наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of agricultural sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Воронежский государственный лесотехнический университет имени Г.Ф. Морозова</institution>
    </aff>
    <aff>
     <institution xml:lang="en">Voronezh State University of Forestry and Technologies named after G.F. Morozov</institution>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2024-08-30T14:33:15+03:00">
    <day>30</day>
    <month>08</month>
    <year>2024</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2024-08-30T14:33:15+03:00">
    <day>30</day>
    <month>08</month>
    <year>2024</year>
   </pub-date>
   <volume>14</volume>
   <issue>2</issue>
   <fpage>5</fpage>
   <lpage>19</lpage>
   <history>
    <date date-type="received" iso-8601-date="2024-05-16T00:00:00+03:00">
     <day>16</day>
     <month>05</month>
     <year>2024</year>
    </date>
    <date date-type="accepted" iso-8601-date="2024-06-07T00:00:00+03:00">
     <day>07</day>
     <month>06</month>
     <year>2024</year>
    </date>
   </history>
   <self-uri xlink:href="http://lestehjournal.ru/en/journal/2024/no-2-54/theoretical-prerequisites-creation-and-some-practical-results-studying-birch">http://lestehjournal.ru/en/journal/2024/no-2-54/theoretical-prerequisites-creation-and-some-practical-results-studying-birch</self-uri>
   <abstract xml:lang="ru">
    <p>В соответствии с Национальной целью «Экологическое благополучие» сформулированы и обоснованы&#13;
17 направлений, по которым проводятся и планируется проводить исследования на объектах ex situ берёзы F1 и&#13;
F2. Изучалась изменчивость роста в высоту семенного потомства и самоопыления на продуктивность (рост в&#13;
высоту) и приживаемость на ранних стадиях онтогенеза у интродуцированных видов берёз, берёзы&#13;
маньчжурской (Betula mandshurica (Regel) Nakai) – диплоид, 2n=2х=28, берёзы тополелистной (Betula&#13;
populifolia Marshall) – диплоид, 2n=2х=28 и берёзы ильмолистной (Betula ulmifolia Cham.) – гексаплоид,&#13;
2n=6х=84. Интерес к этим видам вызван тем, что они являются разноплоидными, берёза ильмолистная имеет 6&#13;
гаплоидных хромосомных наборов. Поскольку приживаемость саженцев является одной из главных&#13;
характеристик при создании лесных культур, был проведён анализ сохранности деревьев берёзы ильмолистной:&#13;
50 % при самоопылении и 81,25 % – при свободном опылении. Даны краткая история терминологии этих видов,&#13;
вариабельность их признаков продуктивности на примере роста в двух-, трёх-, четырех-, пяти- и шестилетнем&#13;
возрасте, а также сохранности некоторых из них. Обнаружено явление «обратной» инбридинговой депрессии для&#13;
полиплоидного интродуцированного вида берёзы – берёзы ильмолистной. Выявленная изменчивость по&#13;
лидирующему типу роста системы размножения у этих интродуцированных видов берёз показывает&#13;
перспективность селекционной работы с полиплоидным видом – берёзой ильмолистной.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>In accordance with the National Goal &quot;Environmental Well-being&quot;, 17 directions have been formulated and justified in which research is being conducted and is planned to be conducted at ex situ birch F1 and F2 fa-cilities. The variability of height growth of seed progeny and self-pollination on productivity (height growth) and survival in the early stages of ontogenesis in introduced birch species, Manchurian birch (Betula mandshurica (Regel) Nakai) – diploid, 2n=2x=28, poplar-leaved birch (Betula populifolia Marshall) – diploid, 2n=2x=28 and elm–leaved birch (Betula ulmifolia Cham.) - hexaploid, 2n=6x=84 were studied. The interest in these species is caused by the fact that they are diverse, the elm-leaved birch has 6 haploid chromosome sets. Since the survival rate of seedlings is one of the main characteristics in the creation of forest crops, an analysis of the preservation of elm-leaved birch (Betula ulmifolia Cham.) trees was carried out, 50% with self-pollination and 81.25% with open pollination. A brief history of the terminology of these species, the variability of their productivity signs are given on the example of growth at two, three, four, five and six years of age, as well as the preservation of some of them. The phenomenon of &quot;reverse&quot; inbreeding depression has been revealed for a polyploid introduced spe-cies of B. ulmifolia. The revealed variability in the leading type of growth of the reproduction system in these introduced birch species shows the prospects of breeding work with polyploid species – B. ulmifolia.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>интродукция</kwd>
    <kwd>онтогенез</kwd>
    <kwd>рост в высоту</kwd>
    <kwd>берёза маньчжурская (Betula mandshurica (Regel) Nakai)</kwd>
    <kwd>берёза тополелистная (Betula populifolia Marshall)</kwd>
    <kwd>берёза ильмолистная (Betula ulmifolia Cham.)</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>introduction</kwd>
    <kwd>ontogenesis</kwd>
    <kwd>growth in height</kwd>
    <kwd>self-pollination</kwd>
    <kwd>open-pollination</kwd>
    <kwd>B. manchurian (Betula mandshuri-ca (Regel) Nakai)</kwd>
    <kwd>B. poplar-leaved (Betula populifolia Marshall)</kwd>
    <kwd>B. elm-leaved (Betula ulmifolia Cham.)</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">исследование выполнено при поддержке гранта Российского научного фонда № 22-64-00036, https://rscf.ru/project/22-64-00036/.</funding-statement>
    <funding-statement xml:lang="en">the study was supported by the grant of the Russian Science Foundation No. 22-64-00036, https://rscf.ru/project/22-64-00036</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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