Table 1.

Statistics of small RNA sequences in all four libraries.

Library	Tag counts after removing low quality sequences	Average length of tags (nt)	Tags annotated to miRBase	Number of ESTs matched to annotated tags	Number of ESTs after BLASTX and Rfam searches	Real precursor miRNAs conformed by SVM
S-M	4,949,795	29.5	258	3253	1178	42
S-PI	4,712,304	29.3	432	4750	2293	43
R-M	3,384,144	28.6	185	1730	694	30
R-PI	3,021,557	28.4	368	4021	1298	27