Table 1. Read statistics in four small RNA libraries and two degradome libraries.

	Libraries	Redundant reads		Unique reads
		Total clean	Wheat EST-matched a	Total clean	Wheat EST-matched a
Small RNA sequencing	7 DPA grains	17,133,120	5,378,231 (31.39%)	2,706,941	549,509 (20.3%)
	14 DPA grains	14,988,782	5,328,512 (35.55%)	3,367,889	663,371 (19.4%)
	21 DPA grains	30,638,998	10,306,959 (33.64%)	2,429,108	558,695 (23.0%)
	28 DPA grains	10,090,349	4,123,925 (40.87%)	890,644	240,652 (27.02%)
Degradome sequencing	Degradome library I b	12,405,890	5,676,935 (45.76%)	2,492,157	810,449 (32.52%)
	Degradome library II c	10,963,967	5,303,271 (48.37%)	2,096,312	753,205 (35.93%)

^a Reads matching NCBI wheat EST database and DFCI Wheat Gene Index.

^b A mixed library composed of 7 and 14 DPA grains.

^c A mixed library composed of 21 and 28 DPA grains.