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Observations on mitotic and meiotic chromosomes of the beet armyworm, Spodoptera exigua Hübner (Lepidoptera: Noctuidae)
Author(s): 
Pages: 135-138
Year: Issue:  1
Journal: ACTA ENTOMOLOGICA SINICA

Keyword:  甜菜夜蛾染色体有丝分裂减数分裂;
Abstract: 以精巢组织为材料,采用空气干燥法制备染色体标本,对甜菜夜蛾Spodoptera exigua有丝分裂和减数分裂染色体形态行为进行了研究.结果表明:甜菜夜蛾的染色体数目为n=31;染色体为弥散着丝粒染色体,2条染色体上存在次缢痕;晚偶线期出现染色体互锁现象;从早粗线期到晚粗线期联会复合体逐渐伸长;终变期同源染色体形成环状、端部交叉、尾尾相对的结构.
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