{"title":"Karyotype and Molecular Genetic Differentiation of a 24-Chromosomal Form of the Gray Hamster Nothocricetulus migratorius from the Tien Shan","authors":"O. V. Brandler, A. V. Blekhman","doi":"10.1134/s1022795424700431","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">\n<b>Abstract</b>—</h3><p>The widespread Palearctic rodent species gray hamster <i>Nothocricetulus migratorius</i> has a karyotype with a stable number of chromosomes 2<i>n</i> = 22 throughout the entire range of its habitat. We found gray hamsters with diploid number of chromosomes 2<i>n</i> = 24 locally distributed in the Qurama Ridge of the Tian Shan. A new karyotype and analysis of G- and NORs-bands of differentially stained chromosome sets were described for the first time. The described karyotype differs from the 22-chromosomal karyotype of gray hamsters by the Y-chromosome morphology and the presence of an additional pair of heteromorphic small chromosomes. Molecular genetic analysis revealed genetic divergence of 24- and 22-chromosomal forms of <i>N. migratorius</i>, and the differences between them in mitochondrial markers are comparable and in terms of nuclear markers exceed the differences between <i>C. barabensis</i> (2<i>n</i> = 20) and <i>C. psevdogriseus</i> (2<i>n</i> = 24). The data obtained give grounds to discuss the taxonomic status of the 24-chromosomal form of gray hamsters from the Qurama Ridge and consider the differentiation of <i>N. migratorius</i> karyomorphs as a stage of chromosomal speciation.</p>","PeriodicalId":21441,"journal":{"name":"Russian Journal of Genetics","volume":"33 1","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2024-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Genetics","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s1022795424700431","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GENETICS & HEREDITY","Score":null,"Total":0}
引用次数: 0
Abstract—
The widespread Palearctic rodent species gray hamster Nothocricetulus migratorius has a karyotype with a stable number of chromosomes 2n = 22 throughout the entire range of its habitat. We found gray hamsters with diploid number of chromosomes 2n = 24 locally distributed in the Qurama Ridge of the Tian Shan. A new karyotype and analysis of G- and NORs-bands of differentially stained chromosome sets were described for the first time. The described karyotype differs from the 22-chromosomal karyotype of gray hamsters by the Y-chromosome morphology and the presence of an additional pair of heteromorphic small chromosomes. Molecular genetic analysis revealed genetic divergence of 24- and 22-chromosomal forms of N. migratorius, and the differences between them in mitochondrial markers are comparable and in terms of nuclear markers exceed the differences between C. barabensis (2n = 20) and C. psevdogriseus (2n = 24). The data obtained give grounds to discuss the taxonomic status of the 24-chromosomal form of gray hamsters from the Qurama Ridge and consider the differentiation of N. migratorius karyomorphs as a stage of chromosomal speciation.
期刊介绍：
Russian Journal of Genetics is a journal intended to make significant contribution to the development of genetics. The journal publishes reviews and experimental papers in the areas of theoretical and applied genetics. It presents fundamental research on genetic processes at molecular, cell, organism, and population levels, including problems of the conservation and rational management of genetic resources and the functional genomics, evolutionary genomics and medical genetics.
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