中文摘要：

mariner转座子在昆虫中广泛存在,转座时不需要宿主特异因子的作用,是昆虫种系转化的有力工具.以mariner转座酶的保守序列设计的简并引物从东亚飞蝗Locusta migratoria manilensis（Meyen）基因组中扩增出7个序列有差异的片段,其中的1个片段能够翻译成为连续的氨基酸序列,另外6个片段中均含有终止子或移码突变.经同源性比对、序列特征分析,证实东亚飞蝗基因组中存在mariner类元件,但大部分都是无功能的假基因;系统进化分析发现东亚飞蝗基因组中的mariner类元件有可能属于新的mariner次级家族.

英文摘要：

The mariner-like elements（MLEs） are widely distributed in insects.Owing to their wide distribution and the ability to move from one location to another without the help of specific host factors,MLEs become powerful tools for genetic manipulation of insect species with special emphasis on insects of economic importance.In that respect,the presence of MLEs was assessed in Locusta migratoria manilensis（Meyen） by polymerase chain reaction（PCR） using degenerate primers designed from two conserved regions of mariner transposase open reading frame.Seven PCR fragments with variation in sequence were identified from the locust,and among them one fragment showed a continuous amino acid sequence and the other 6 PCR fragments were pseudogenes with stop codons,frameshifts or deletions in the deduced amino acid sequences.Homologous analysis and sequence character showed that the fragment with continuous amino acid sequence was MLE and possibly belonged to a new subfamily of mariner family.These data suggested that L.migratoria manilensis possessed MLE,but mostly existed as pseudogenes in its genome.