Figure 3

The summary of sRNA-seq data. (A) Number of different types of reads in eight libraries. High quality reads represent reads without N characters, or without quality scores lower than 10 for > 4 bases or 13 for > 6 bases. Clean reads represent reads without adaptors and contaminants. Reads with size ranging from 18 to 35 nt and observed more than three times was considered as reliable reads. Only one nucleotide mismatch was allowed for mapping reads to the reference genome; (B) The length distribution of mappable reads in eight libraries; (C) The proportion of total mappable reads with different length during development; (D) The proportion of unique reads with different length.