Vakurin A.A., Korablev V.P., Kartavtseva I.V.
В издании Modern achievements in population, evolutionary and ecological genetics (MAPEEG - 2011): Program and Abstract of International Symposium
Год: 2011 Страницы: 47
Hamsters of the genus Cricetulus Milne-Edwards, 1867 of group “C. barabensis” form wide areal polymorphic superspecies complex inhabiting a wide range of landscapes from the West Siberian lowlands to the Primorye Terr. and lower reaches of the Yangtze river. The priority task is the detection of geographic variation and the determination of taxonomic status of forms that make up this complex. We studied the karyotypes of 31 specimens of striped hamsters C. barabensis from the following localities: 1. Transbaikal Terr. 2. Buryatiya. 3. Novosibirsk Region. 4. Amur Region. 5. Jewish Autonomous Region. 6. Primorye Terr. Cricetulus barabensis – striped hamster has a karyotype 2n=20, NF=38. Autosomes divided into three groups. The first group includes two large and three medium-sized pairs metacentric chromosomes. The second group is presented by only one pair medium size acrocentric chromosome. The third group is united by three pairs of small metacentrics. The X chromosome is medium size subtelocentric. The Y chromosome is smaller submetacentric. According to preliminary data of the differential staining (C-banding), the heterochromatic blocks were detected in pericentromeric regions of the 3-rd pair (the first group), 6-th pair (the second group), 7-th, 8-th and 9-th pairs (the third group) of autosomes. In addition, the intercalary heterochromatic blocks of uncertain standing are revealed on two large pairs of the fist group autosomes. Interpopulation variability observed by C-staining of the X chromosome: the pericentromeric heterochromatic blocks are revealed on specimens from Sohondinskiy Reserve and Primorye Terr. (Pogranichnyi Distr.); the upper arm and half of the lower arm of the X chromosome are painted on specimens from Buryatiya (Ivolginsk Distr., near the Oshurkovo village). The Y chromosome has completely heterochromatic lower arm.
