Safronova L D, Cherepanova E V
Genetika. 2007 Jun;43(6):796-803.
The prophase of the first meiotic division was studied in field mice of the species Apodemus (Sylvaemus) flavicollis, A. (S.) ponticus, and A. (S.) uralensis by light and electron microscopy. The karyotypes of the species were described on the base of electron microscopy of synaptonemal complexes in spermatocytes I. The axial elements of the sex chromosomes at early-middle pachytene can synapse along the major portion of the Y axis; at late pachytene-early diplotene, the synapsis region shrinks; and at diakinesis-metaphase I, X and Y chromosomes associate tail-to-tail in all species studied. The behavior of sex chromosomes in the synapsis in the species studied was quite uniform. The results are discussed in the context of earlier data on the behavior of sex chromosomes in various rodent species in meiosis prophase I and their banding.
通过光学显微镜和电子显微镜对黄颈姬鼠（Apodemus (Sylvaemus) flavicollis）、 Ponticus姬鼠（A. (S.) ponticus）和乌拉尔姬鼠（A. (S.) uralensis）这几种田鼠减数第一次分裂前期进行了研究。基于对初级精母细胞中联会复合体的电子显微镜观察，描述了这些物种的核型。在粗线期中期，性染色体的轴状元件可沿Y轴的大部分区域发生联会；在粗线期末期至双线期早期，联会区域收缩；在终变期至减数第一次分裂中期，在所研究的所有物种中，X和Y染色体尾对尾相连。在所研究的物种中，性染色体在联会时的行为相当一致。结合之前关于各种啮齿动物物种在减数分裂前期I中性染色体行为及其带型的相关数据，对研究结果进行了讨论。
