Table 1.

Statistics of the small RNA sequences generated from the five tissue types of B. rapa

	Seedling	Root	Petiole	Leaf	Flower	Total
Raw reads	258,431	22,729	17,263,448	21,372,578	8,737,275	47,654,461
Reads of 17 to 36 nt	243,640	21,680	11,813,169	20,598,405	8,124,108	40,801,002
Unique reads	156,651	17,771	2,219,348	5,150,968	2,925,823	9,130,544b
Genome matcha	51,147	5,184	509,173	1,575,267	1,106,694	2,752,756b
Unassembled sequence matcha	60,937	6,638	1,049,984	1,686,965	919,182	3,139,339b
NCBI NR database matcha	8,514	1,003	122,912	352,798	153,372	577,500b
No matcha	36,053	4,946	537,279	1,535,938	746,575	2,660,949b

^a one mismatch is allowed, ^b non-redundant unique reads.