Instability of B-chromosomes in somatic and germline cells of Apodemus peninsulae |
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Authors: | Yu M Borisov |
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Institution: | (1) Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, 119071, Russia |
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Abstract: | Instability of B-chromosomes was estimated in somatic and germline cells of samples Apodemus peninsulae from different localities of the species range. In 84 out of 188 animals (45%), in cells assessed for B-chromosome mosaicism, bone marrow cells with different B-chromosome number were observed. The numbers of B-chromosomes in spermatocytes at the pachytene stage were estimated in ten males. It was shown that the average number of B-chromosomes and the number of cell clones in germline cells was higher than the corresponding numbers in bone marrow cells. The higher number of B-chromosomes and their higher variability in germline cells than in somatic cells suggest the existence of a mechanism of premeiotic accumulation of B-chromosomes in spermatogenesis of A. peninsulae |
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