Variations in Chromosome Synapsis at Meiotic Prophase I in the Mole Voles Ellobiustancrei Heterozygous for Robertsonian Translocations

It was demonstrated that in the meiotic prophase I, in heterozygotes for the Robertsonian translocations, different combinations of meiotic configurations (different trivalent numbers and different chromosome chain structures) in the same individual could be identified. In the present study, two typ...

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Bibliographic Details
Published in:Russian journal of genetics 2023-12, Vol.59 (12), p.1405-1408
Main Authors: Matveevsky, S. N., Bogdanov, Yu. F., Lyapunova, E. A., Bakloushinskaya, I. Yu, Kolomiets, O. L.
Format: Article
Language:English
Subjects:
Animal Genetics and Genomics
Biomedical and Life Sciences
Biomedicine
Human Genetics
Microbial Genetics and Genomics
Short Communications
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Summary:It was demonstrated that in the meiotic prophase I, in heterozygotes for the Robertsonian translocations, different combinations of meiotic configurations (different trivalent numbers and different chromosome chain structures) in the same individual could be identified. In the present study, two types of experimental hybrids of the eastern mole vole Ellobius tancrei , heterozygous for four Robertsonian translocations, were examined. Instead of the expected four trivalents at the pachytene stage, various types of meiotic configurations, up to the chains of ten elements, were identified. It is suggested that the progression of meiosis occurring in different cells depends on the structure of the formed chains and the possibility of their correction. These variations may lead to the decreased gamete production, but not to the arrest of gametogenesis, which is the basis for the maintenance of Robertsonian translocations in the population.
ISSN:1022-7954
1608-3369
DOI:10.1134/S1022795423120049