Specific features of T-DNA insertion regions in transgenic plants

Experimental data from analysis of exogenous DNA (T-DNA) insertion sites in transgenic plants are summarized. Arguments are considered in favor and against the existence of genome DNA regions preferred for transgene integration that are determined by distinctive features characterizing the organization and nucleotide composition of the plant genome and the structure and conformational state of the chromatin. The main stages of T-DNA integration into a plant chromosome and possible molecular mechanisms of this process are discussed.