唐氏鼹形田鼠（啮齿目，仓鼠科）罗伯逊易位杂合子减数分裂染色体结构与行为分析：单臂同源性实例

Matveevsky Sergey, Bakloushinskaya Irina, Tambovtseva Valentina, Romanenko Svetlana, Kolomiets Oxana

N.I. Vavilov Institute of General Genetics, RAS, 3 Gubkin st., Moscow, 119991, Russia.

N.K. Koltzov Institute of Developmental Biology, RAS, 26 Vavilov st., Moscow, 119334, Russia.

Comp Cytogenet. 2015 Dec 2;9(4):691-706. doi: 10.3897/CompCytogen.v9i4.5674. eCollection 2015.

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.

在1884年的坦氏麝鼹（Ellobius tancrei Blasius）种内半不育F1杂种中发现了联会复合体（SC）链，该杂种对于罗伯逊易位（Rb）是杂合的（2n = 49，NF = 56和2n = 50，NF = 56）。链由具有单臂同源性的Rb亚中着丝粒染色体形成。这些杂种精母细胞中的染色体联会受到干扰，显然是因为染色体从SC链中释放存在问题。这些杂种的育性较低，我们的数据支持这样一种观点，即同一物种不同种族内具有单臂同源性的Rb中着丝粒染色体的形成可能是染色体形式分化的初始事件。