Table 3.

Classification of integration strategies used by TE families analyzed in this study based on their distribution near genes and the association of TE targeting frequency with gene expression levels

Strategy	Typical TE family	Host	Associated region	Expression levels of target genes
A	Mu	Maize	TSS	High
A	P	Drosophila	TSS	High
B	Ac/Ds	Maize, rice	TSS and TTS	Medium-to-high
B	Piggybac	Drosophila	TSS and TTS	Higher than Ac/Ds, lower than Mu and P
C	Minos	Drosophila	Not observed	Low-to-medium
C	Tnt1	Medicago	Gene body	Low-to-medium
C	Tos17	Rice	Gene body	Medium-to-high
C	Spm	Rice	Not observed	Medium-to-high