Dougherty Kevin M, Plague Gordon R
Louis Calder Center, Department of Biological Sciences, Fordham University, P.O. Box 887, Armonk, NY 10504, USA.
Appl Environ Microbiol. 2008 Dec;74(24):7832-4. doi: 10.1128/AEM.01049-08. Epub 2008 Oct 24.
Not only are transposable elements profuse in the bacterial endosymbiont of maize weevils, but we found that their quantities also vary approximately 10-fold among individual weevils. Because multicopy elements can facilitate homologous recombination, this insertion sequence (IS) load variability suggests that these essentially asexual bacteria may exhibit substantial intraspecific genomic variation.
不仅玉米象的细菌内共生体中存在大量转座元件，而且我们发现，单个象鼻虫体内这些元件的数量差异约为10倍。由于多拷贝元件可促进同源重组，这种插入序列（IS）负荷的变异性表明，这些基本为无性繁殖的细菌可能表现出显著的种内基因组变异。
