I-ELEMENTS AND THE DROSOPHILA GENOME
I-ELEMENTS AND THE DROSOPHILA GENOME
复制标题
DOI：
10.1007/bf00133719
复制
发表时间：
1992-01-01
期刊：
影响因子：
1.5
通讯作者：
SIMONELIG, M
中科院分区：
文献类型：
--
作者：
BUCHETON, A;VAURY, C;SIMONELIG, M
LINE是真核生物中的一大类转座因子。它们通过RNA中间体的逆转录转座。黑腹果蝇的I元件属于这一类，并且负责杂种发育不全的I-R系统。许多结果表明，在世纪初，该物种的自然居群缺乏活性I元素，并在过去的几十年中，他们被入侵的功能I元素。许多果蝇物种同时含有缺陷型和活性型I元件。后者似乎在黑腹果蝇传播到世界各地之前就已经丢失了，而最近的入侵是由于功能元件的传播，这些功能元件要么来自另一个物种，要么来自同一物种的孤立种群。这些数据进行了讨论，以及它们在进化过程中的意义。
LINEs are a large class of transposable elements in eukaryotes. They transpose by reverse transcription of an RNA intermediate. I elements of Drosophila melanogaster belong to this class and are responsible for the I-R system of hybrid dysgenesis. Many results indicate that at the beginning of the century natural populations of this species were devoid of active I elements and that they were invaded by functional I elements in the last decades. Many Drosophila species contain both defective and active I elements. It seems that the latter were lost in Drosophila melanogaster before its spread throughout the world, and that the recent invasion results from the spread of functional elements originating either from another species by horizontal transfer or from an isolated population of the same species. These data are discussed, as well as their significance in evolutionary processes.