Borodin P.M., Basheva E.A., Torgasheva A.A., Dashkevich O.A., Golenishchev F.N., Kartavtseva I.V., Mekada K., Dumont B.L.
В журнале Chromosome Research
Год: 2012 Том: 20 Страницы: 259–268
In many eutherian mammals, X–Y chromosome pairing and recombination is required for meiotic progression and correct sex chromosome disjunction. Arvicoline rodents present a notable exception to this meiotic rule, with multiple species possessing asynaptic sex chromosomes. Most asynaptic vole species belong to the genus Microtus sensu lato. However, many of the species both inside and outside the genus Microtus display normal X–Y synapsis at meiosis. These observations suggest that the synaptic condition was present in the common ancestor of all voles, but gaps in current taxonomic sampling across the arvicoline phylogeny prevent identification of the lineage(s) along which the asynaptic state arose. In this study, we use electron and immunofluorescent microscopy to assess heterogametic sex chromosome pairing in 12 additional arvicoline.
