Table 2.

Annotations of sRNAs perfectly matchingA. thalianaandP. trichocarpagenomes

	A. thaliana		P. trichocarpa
Class*	Unique	Total	Unique	Total
Match genome	73,317	6,612,119	66,269	5,825,093
Known miRNA	584	1,402,527	375	1,383,562
r/t/sn/snoRNA	39,304	5,136,628	35,706	3,097,919
Repeat	2603	10,280
Exon-sense	21,764	35,844	6937	127,584
Exon-antisense	2171	6126	7125	608,685
Intron-sense	239	435	542	2221
Intron-antisense	244	681	678	1134
Un-annotated	6408	19,598	14,906	603,988

^*sRNA categories, repeat, exon-sense, exon-antisense, intron-sense and intron-antisense, contain sRNAs perfectly matching the repeat sequences in the GenBank databases and Rfam database, the sense strand of a protein coding gene exon, the antisense strand of a protein coding gene exon, the sense strand of a protein coding gene intron and the antisense strand of a protein coding gene intron, respectively.