Distribution of the sequences in the four sRNA libraries of root, stem, leaf and flower of S. miltiorrhiza, respectively.

3ADT & length filter: reads removed due to 3ADT not found and length with 25 nt were removed.Junk reads: Junk: > = 2N, > = 7A, > = 8C, > = 6G, > = 7 T, > = 10 Dimer, > = 6 Trimer, or > = 5 Tetramer.Rfam: Collection of many common non-coding RNA families except micro RNA; http://rfam.janelia.org.Repeats: Prototypic sequences representing repetitive DNA from different eukaryotic species; http://www.girinst.org/repbase.Notes: There is overlap in mapping of reads with rRNA, tRNA, snRNA, snoRNA and repeats.Distribution of the sequences in the four sRNA libraries of root, stem, leaf and flower of S. miltiorrhiza, respectively.