| Autor: |
Matveevsky S; N.I. Vavilov Institute of General Genetics, RAS, 3 Gubkin st., Moscow, 119991, Russia., Bakloushinskaya I; N.K. Koltzov Institute of Developmental Biology, RAS, 26 Vavilov st., Moscow, 119334, Russia., Tambovtseva V; Lomonosov Moscow State University, Leninskiye Gory, 1, Moscow, 119991, Russia., Romanenko S; Institute of Molecular and Cellular Biology, Siberian Branch, RAS, 8/2 Av. Acad. Lavrent'ev, Novosibirsk, 630090, Russia; Novosibirsk State University, 2 Pirogov st., Novosibirsk, 630090, Russia., Kolomiets O; N.I. Vavilov Institute of General Genetics, RAS, 3 Gubkin st., Moscow, 119991, Russia. |
| Abstrakt: |
Synaptonemal complex (SC) chains were revealed in semisterile intraspecific F1 hybrids of Ellobius tancrei Blasius, 1884 (2n = 49, NF=56 and 2n=50, NF=56), heterozygous for Robertsonian (Rb) translocations. Chains were formed by Rb submetacentrics with monobrachial homology. Chromosome synapsis in spermatocytes of these hybrids was disturbed, apparently because of the problematic release of the chromosomes from the SC chains. These hybrids suffer from low fertility, and our data support the opinion that this is because a formation of Rb metacentrics with monobrachial homology within different races of the same species might be an initial event for the divergence of chromosomal forms. |
