Diversity and individuality of variants of the system of B chromosomes in mice <Emphasis Type="Italic">Apodemus peninsulae</Emphasis> |
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Authors: | Yu M Borisov M N Bochkarev |
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Institution: | (1) Severtsev Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, 119071, Russia;(2) Institute of Cytology and Genetics, Russian Academy of Sciences, Novosibirsk, 630090, Russia |
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Abstract: | A complicated population system of B chromosomes has been revealed in the karyotypes of the East-Asian mouse Apodemus peninsulae over the whole range. Based on our previous data for mice from Altai, Siberia, Pribaikal’e, and Mongolia and on the results of the present work, we infer that most of animals studied (196 out of 312, or 63%) have an individual variant of the B chromosome system. Only three mice lacked B chromosomes. New data for 44 A. peninsulae mice caught in 2000–2005 in 16 localities of seven regions of Altai, Siberia, and Pribaikal’e showed that all of them had individual variants of the system of B chromosomes due to different combinations (from 2 to 18 B chromosomes) of five classes of B macro- and microchromosomes. |
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