Romanenko S A, Lebedev V S, Serdukova N A, Feoktistova N Y, Surov A V, Graphodatsky A S
Institute of Molecular and Cellular Biology, SB RAS, Novosibirsk, Russia.
Cytogenet Genome Res. 2013;139(4):258-66. doi: 10.1159/000346194. Epub 2013 Jan 17.
Chromosome painting and G-banding analyses were used to delimit homologous chromosomal segments among 4 taxa of the hamsters genus Allocricetulus Argyropulo 1932 (Cricetidae, Murоidea, Rodentia)--A. curtatus (2n = 20), A. eversmanni eversmanni, A. eversmanni pseudocurtatus, and the hybrid A. eversmanni beljaevi × A. eversmanni pseudocurtatus (all 2n = 26). Comparative maps between the 4 karyotypes were established based on chromosome painting of chromosome-specific probes from the Syrian hamster (Mesocricetus auratus, 2n = 44). A putative ancestral karyotype for the genus Allocricetulus (AAK) was proposed and contains 12-13 ancestral autosomal elements. Integrated maps demonstrate extended conservation of syntenies within this rodent genus and show the predominant role of Robertsonian rearrangements in the karyotype evolution of the genus Allocricetulus. At the cytogenetic level, we clearly demonstrate karyological differences between karyotypes of species (A. curtatus vs. A. eversmanni) and subspecies A. e. eversmanni and A. e. beljaevi versus A. e. pseudocurtatus, but the karyotypes of A. e. eversmanni and A. e. beljaevi are identical at this level of resolution.
染色体描绘和G带分析被用于界定1932年阿氏仓鼠属（Allocricetulus Argyropulo，仓鼠科、鼠形亚目、啮齿目）的4个分类单元中的同源染色体片段，即短尾阿氏仓鼠（2n = 20）、艾氏仓鼠指名亚种（A. eversmanni eversmanni）、艾氏仓鼠伪短尾亚种（A. eversmanni pseudocurtatus）以及杂种艾氏仓鼠贝氏亚种（A. eversmanni beljaevi）×艾氏仓鼠伪短尾亚种（均为2n = 26）。基于叙利亚仓鼠（金仓鼠，Mesocricetus auratus，2n = 44）染色体特异性探针的染色体描绘，建立了这4种核型之间的比较图谱。提出了阿氏仓鼠属的一个假定祖先核型（AAK），其包含12 - 13个祖先常染色体元件。整合图谱显示了该啮齿动物属内同线性的广泛保守性，并表明罗伯逊重排在阿氏仓鼠属核型进化中起主要作用。在细胞遗传学水平上，我们清楚地证明了不同物种（短尾阿氏仓鼠与艾氏仓鼠）以及艾氏仓鼠指名亚种和艾氏仓鼠贝氏亚种与艾氏仓鼠伪短尾亚种之间核型的差异，但在该分辨率水平上，艾氏仓鼠指名亚种和艾氏仓鼠贝氏亚种的核型是相同的。
