Table 1.

Small RNAs in Arabidopsis

Coding RegionsIntron Regions
RNAsNontransposonsTransposonsNontransposonsTransposonsStructural RNAaIGRb
Single-locus small RNAsc4400072
Multiple-locus small RNAsd5491141
Total small RNAs (single + multiple)98911113
Small RNA loci in the genomee111592137365
  • a One small RNA corresponds to the 5S rRNA repeat unit.

  • b Contains all small RNAs with sequence identity to IGRs, including pseudogenes.

  • c Identified as small RNAs with complete sequence identity to only one locus in the Arabidopsis genome.

  • d Identified as small RNAs with complete sequence identity to multiple loci in the Arabidopsis genome.

  • e Total number of loci with complete sequence identity to small RNAs.