The relative activity and relative abundance of the TE families in O. sativa. We compared the relative activity with the relative abundance of all TE families in O. sativa. Group I consists of families with high activity and high abundance. The CACTA family DTC_Calvin, which is the overall most abundant family, also shows remarkable activity. Group II contains elements with high activity but low copy numbers. We found that Mutator (DTM) and hAT (DTA) families are relatively active despite their poor abundance. Finally, Group III consists of families with high abundance but relatively little activity. This class is dominated by families of the Harbinger (DTH) and Mariner (DTT) superfamilies. The Harbinger family DTH_TO seems to be still relatively active despite its high abundance, whereas the most abundant Mariner and Mutator families DTT_SB and DTM_MAF, respectively, show no activity at all.