Fig. 1.

Distributions of lengths and the first nucleotides of small RNAs and miRNAs from the 13 small-RNA sequencing data. a Length distribution of all sequencing reads (“all”) that have a 3′ sequencing adaptor, are of high quality and can perfectly map to the Arabidopsis genome or cDNA sequences, and distribution of those reads in “all” that exclude miscellaneous noncoding RNAs, including tRNAs, rRNAs, snRNAs and snoRNAs (“all no misc”). Horizontal axis shows the sequence lengths and the vertical axis is the percent of sequences of a particular length. b Distribution of the first nucleotides of “all” and “all no misc” reads in a, respectively. c Length distribution of sequence reads that perfectly map to the known miRNAs. c Distribution of the first nucleotides of reads mapped to the known miRNAs