The karyotypes of 13 greater long-tailed hamsters (Tscherskia triton de Winton, 1899) (eight males and five females) from Primorskii krai (Russia), including six males and one female from the vicinity of the city of Ussuriisk and two males and four females from the vicinity of the village of Pogranichnyi, have been studied. The karyotypes of five males (four from the vicinity of Ussuriisk and one from the vicinity of Pogranichnyi) have been found to contain one or two small acrocentric B chromosomes each. In males with B chromosomes, each germline cell contains one or two B chromosomes. The proportion of somatic cells carrying B chromosomes varies from 34.9 to 55.9% in these males. Karyological study of a total of 45 Tscherskia triton (30 males and 15 females) from Primorskii krai has been performed, B chromosomes being found in only five males (11.1%). In T. triton populations of Korea and China, also only a few animals have been found to carry one or two B chromosomes. The greater long-tailed hamster belongs to the monotypic genus Tscherskia; the animals described earlier under the names T. (Cricettilus) triton albipes Ognev, 1914 and T. Cricettilus) triton nestor Thomas, 1907 belong to the only species in the genus, T. triton de Winton, 1899.
Russian Journal of Genetics – Springer Journals
Published: May 15, 2012
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