MALE MEIOSIS IN POLYPLOID SILKWORMS, BOMBYX-MORI L (LEPIDOPTERA, BOMBYCIDAE)

被引：9
|
作者：
KAWAMURA, N
机构：
[1] Laboratory of Applied Molecular Entomology, Faculty of Agriculture, Hokkaido University, Kita-ku, Sapporo, 060, N-9
来源：
INTERNATIONAL JOURNAL OF INSECT MORPHOLOGY & EMBRYOLOGY | 1994年 / 23卷 / 04期
关键词：
TETRAPLOID; HEXAPLOID; SPERMATOCYTE; MEIOSIS;
D O I：
10.1016/0020-7322(94)90027-2
中图分类号：
Q96 [昆虫学];
学科分类号：
摘要：
Tetraploid and hexaploid silkworms, Bombyx mori L. (Lepidoptera : Bombycidae) were induced by applying a cold shock to diploid and triploid eggs at the first cleavage stage. Male meiosis in the primary spermatocytes of these silkworms having a different ploidy was observed. In the polyploid cells, chromosome bridges, 2 for the tetraploid and 3 for the hexaploid, occurred between the newly formed daughter nuclei at telophase. Observation in the living spermatocytes showed that tetraploid cells needed a longer time than the diploid ones to complete the first meiotic division. The delay in the cell division may be responsible for the high sterility of the tetraploid males.
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页码：311 / 317
页数：7
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