Vereĭskaia V N
Ontogenez. 1979;10(3):244-52.
The orientation of bivalentss in the first meiotic metaphase was studied on the squash preparations and sections of eggs in Bombyx mori L., Antheraea pernyi Guèr and Carpocapsa pomonella L. The reduction fissure of bivalents separating the homologous chromosomes lies in the plane of spindle equator; the equation fissure separating the sister chromatids is parallel to the long spindle axis. Complicated rearrangements are observed in the nuclei of the silkworm eggs stimulated to ameiotic parthenogenesis by the high temperature dissociation of bivalents, full destruction of spindle, formation of a new spindle and metaphase plate. The latter includes univalent chromosomes involved in the equation division. As a result, two genetically identical pronuclei with the somatic set of chromosomes are formed.
对家蚕（Bombyx mori L.）、柞蚕（Antheraea pernyi Guèr）和苹果蠹蛾（Carpocapsa pomonella L.）卵的压片标本和切片进行研究，观察了第一次减数分裂中期二价体的取向。分离同源染色体的二价体的减数分裂裂缝位于纺锤体赤道平面；分离姐妹染色单体的有丝分裂裂缝与纺锤体长轴平行。在家蚕卵细胞核中观察到复杂的重排现象，这些卵通过二价体的高温解离、纺锤体的完全破坏、新纺锤体和中期板的形成，被刺激进行无减数孤雌生殖。后者包括参与有丝分裂的单价染色体。结果，形成了两个具有体细胞染色体组的遗传上相同的原核。
