鲻鱼早期卵子发生的超微结构研究

用电子显微镜技术观察鲻鱼早期卵子发生进入第一次成熟分裂前期联会丝复合体期、粗线期、双线期和网状期卵原细胞和初级卵母细胞生发泡和胸质的超微结构特点。在联会丝复合体期，生发泡内同源染色体配对，联会丝复合体中央出现重组节，胞质中不同发育类型的核仁样及其相关线粒体的分布及其数量可作为划分鲻鱼早期卵子发生各个时期的依据。另外，首次观察到靠近膜细胞有一种不规则形细胞，推测是分泌成熟抑制肽细胞。

AN ULTRASTRUCTURAL STUDY OF THE EARLY OOGENESIS IN STRIPED MULLET, MUGIL CEPHALUS

Ultrastructural characteristics of oogonia and primary oocyte in the synaptonemal complexes, pachytene, diplotene and dictyate stages of the first meiotic prophase of striped mullet in the early oogenesis were observed hr using transmission electron microscopy. Two homologous chromosomes pair within the germinal vesicle(GV) and recombination nodules occurred at the central region of synaptonemal complex during synaptonemal complex stage. The distribution and number of different types of nucleolus-like bodies and related mitochondria in the cytoplasm of oocyte might differentiate each stage of early oogenesis in striped mullet. In addition, we observed for the first time that there was an irregular cell close to the theca cell and we guessed secretory mature inhibiting pep-tide.