Identifying the copy number of foreign gene in transgenic primary plants is the basic step in genetic engineering application.In this paper,Real-time PCR and the related PfaffI method,usually applied to studying transgenic expression,was used to analyze comparatively the differences of exogenous gene copy number of transgenic cotton(Gossypium hirsutum) T0 plants transformed with one same vector by three different methods,Agrobacterium-mediated,gene-gun bombardment and pollen tube injection,respectively.Resu...
【基金】
国家重点基础研究发展规划(973)项目(2010CB126005)资助
【更新日期】
2011-05-26
【分类号】
S562
【正文快照】
转基因拷贝数是影响外源基因表达水平和遗传稳定性的重要因素。一般认为,直接转化法往往会造成外源基因整合位点较多、拷贝数多特征(Pawlowskiand Somers,1996;Vain et al.,2002);同样有研究表明,即使农杆菌介导的遗传转化,转化群体中仍普遍存在整合有3拷贝以上的转化体(Zapata