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Особенности кариотипов русской (Desmana moschata) и пиренейской (Galemys pyrenaicus) выхухолей в связи с вопросом о положении этих видов в семействе (Mammalia, Insectivora)
The karyotype and the spermatozoid head structure in a male, of the Russian desman (Desmana moschata L.) from the Oksky Reserve (Ryazan District) were investigated for the first time; the comparison between the karyotypes of the Russian desman and of the Pyrenean desman (Galemys pyrenaicus Geof.) and between them and the karyotypes of other species from the family Talpidae was carried out. There are thirty-two two-armed chromosomes in the diploid set of the Russian desman, among them 12 mcta-centrics, 16 submetacentrics, two big subtelocentrics, the big submeta-subtelocentric .X-chromosome, and the smallest in kafyotype submetacentric У-chromosome; NF=64. The spermatozoid head looks like a cherry. The < Pyrenean desman karyotype (2n = 42, NF from 65 to 67, according to Peyre, 1957) is the most archaic in the family Talpidae, since there are more acrocentrics in this species than in any other of 19 species of moles and desman. The Russian desman karyotype is closely related to the karyotypes of the family Talpidae species. Apparently, its karyotype has been formed as a result of eight centric combination of 16 acrocentrics from the chromosome set of its ancestor that was similar by the karyotype to the Pyrenean desman; the Russian desman karyotype, reflects evolutionary interrelations between desmans and moles
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