Studies on the cytology and early embryology of the egg of Drosophila melanogaster
Studies on the cytology and early embryology of the egg of Drosophila melanogaster
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DOI：
10.1002/jmor.1050690102
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发表时间：
1941-07-01
影响因子：
1.5
通讯作者：
Rabinowitz, M
中科院分区：
文献类型：
--
作者：
Rabinowitz, M
描述了极体核的历史。分裂核在胚基形成开始时到达整个卵的外周。胚叶核在外周连续3次同步分裂。描述了胚根细胞核的有丝分裂过程，在第1、2天的有丝分裂过程中，极细胞出芽脱落。只要极芽和后卵质之间存在原生质连续性，极核就与芽细胞核同步分裂。一些极细胞迁移到胚盘核之间的胚盘完成后，其余的极细胞迁移到直肠-直肠内陷。本发明提供了一种获得D.本文描述了已知年龄的黑腹果蝇的早期发育时间表，从2d成熟分裂到3d囊胚期有丝分裂。是的。根据3个不同温度下的时间表，估计了卵裂核和胚状体核的有丝分裂速率。
The history of the polar-body nuclei is descr. Cleavage nuclei reach the periphery throughout the egg at the onset of the formation of the blastema. The blasteme nuclei undergo 3 consecutive and synchronous divisions at the periphery. Mitosis of the blasteme nuclei is descr. The pole cells are budded off during the 1st and 2d blasteme mitoses. As long as there is protoplasmic continuity between the polar buds and the posterior ooplasm, the polar nuclei undergo division synchronously with the blasteme nuclei. Some of the pole cells migrate between the blastoderm nuclei before completion of the blastoderm posteriorly ; the rest of the pole cells migrate into the amnio-proctodeal invagination. A method for obtaining eggs of D. melanogaster of known ages is descr. Time tables for the early development, extending from the 2d maturation division to the 3d blasteme karyokinesis, have been constructed. The ay. rate of mitosis of the cleavage nuclei and of the blasteme nuclei has been estimated from the time tables at 3 different temps.