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中文摘要：
昼夜节律是最普遍的生物节律现象,受遗传基因调控,其分子机制在黑腹果蝇Drosophila melanogaster中有较为深入的研究,在其他昆虫中的研究相对较少。家蚕Bombyx mori的滞育是对昼夜节律授时因子响应的一种现象,可作为研究的参照。通过电子克隆的方法获得了家蚕生物钟基因Bmvri,Bmcyc,Bmtim2,Bmpdp完整的开放阅读框（ORF）序列,以及Bmclk基因的ORF片段,并对上述基因及其表达产物进行了结构分析、染色体定位和系统的分子进化分析,根据这些基因及其表达产物的结构特征结合现有的数据资源,整合了家蚕昼夜节律生物钟反馈环路。
英文摘要：
Circadian rhythm is the most common phenomenon of biological rhythms,which is regulated by the genetic clock genes. Intensive research about molecular mechanism of circadian rhythm has been carried out in Drosophila melanogaster. Diapause of the silkworm（ Bombyx mori） is a phenomenon to response the circadian rhythm zeitgeber,therefore it can be used as reference to circadian rhythm research. The open reading frame（ ORF） sequences of Bmvri,Bmcyc,Bmtim2,Bmpdp and Bmclk fragment were cloned in silico,followed by genetic structure analysis,chromosome location and molecular phylogenetic analysis of those genes and their expression products. With the data resources,the current feedback loop of circadian rhythm in silkworm was integrated according to the structural characteristics of biological clock genes and their expression products.
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