{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T10:44:26Z","timestamp":1782816266904,"version":"3.54.5"},"reference-count":33,"publisher":"Pensoft Publishers","license":[{"start":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T00:00:00Z","timestamp":1782777600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006769","name":"Russian Science Foundation","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100006769","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["CCG"],"abstract":"<jats:p>\n                    Cytogenetic analysis of\n                    <jats:italic>Citrus<\/jats:italic>\n                    Linnaeus, 1753 species is complicated by the small size and morphological similarity of their chromosomes. In this study, we applied the fluorescence\n                    <jats:italic>in situ<\/jats:italic>\n                    hybridization (FISH) method using rDNA probes, as well as newly developed oligonucleotide probes based on previously uncharacterized tandem repeats identified in citrus genomes. Four tandem repeats (CL1, CL14, CL262, and CL122) were mapped to the chromosomes of five\n                    <jats:italic>Citrus<\/jats:italic>\n                    species:\n                    <jats:italic>Citrus medica<\/jats:italic>\n                    Linnaeus, 1753,\n                    <jats:italic>Citrus \u00d7 aurantiifolia<\/jats:italic>\n                    (Christmann, 1777) Swingle, 1913,\n                    <jats:italic>Citrus \u00d7 limon<\/jats:italic>\n                    (Linnaeus, 1753) Osbeck, 1765,\n                    <jats:italic>Citrus myrtifolia<\/jats:italic>\n                    Rafinesque, 1838, and\n                    <jats:italic>Citrus \u00d7 latifolia<\/jats:italic>\n                    Tanaka, 1951. The repeats exhibited distinct and partially species-specific distribution patterns: CL1 was detected in all species, whereas CL262, CL122, and CL14 exhibited more restricted localization. A comparative analysis of their chromosomal distribution in relation to 45S- and 5S-rDNA loci revealed differences between the conserved regions of ribosomal DNA and the more dynamic tandem repeats. The identified repeats represent useful cytogenetic markers for chromosome identification, karyotyping, and comparative analysis within the genus\n                    <jats:italic>Citrus<\/jats:italic>\n                    .\n                  <\/jats:p>","DOI":"10.3897\/compcytogen.20.190408","type":"journal-article","created":{"date-parts":[[2026,6,30]],"date-time":"2026-06-30T09:53:32Z","timestamp":1782813212000},"page":"157-170","source":"Crossref","is-referenced-by-count":0,"title":["Fish mapping of rdna and novel tandem repeats in Citrus species"],"prefix":"10.3897","volume":"20","author":[{"given":"Yuliya N.","family":"Smotrova","sequence":"first","affiliation":[{"name":"All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia"},{"name":"Moscow Institute of Physics and Technology, Dolgoprudny, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mikhail Gr.","family":"Monakhos","sequence":"additional","affiliation":[{"name":"All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia"},{"name":"Russian State Agrarian University \u2013 Moscow Timiryazev Agricultural Academy, Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Olga V.","family":"Razumova","sequence":"additional","affiliation":[{"name":"All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dmytry V.","family":"Romanov","sequence":"additional","affiliation":[{"name":"All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2258","published-online":{"date-parts":[[2026,6,30]]},"reference":[{"key":"190408_B1","doi-asserted-by":"publisher","DOI":"10.55959\/MSU0137-0952-16-79-4-3"},{"key":"190408_B2","unstructured":"Barkov AN, Trubnikova EV, Stabrovskaya NV (2007) Molecular features of the organization and transcription of ribosomal genes. 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