Table 1.

Pre-analysis of raw reads.

ID	Raw reads	Trimmed reads (15-30 nt)	Discarded reads	Sequence tags
SBH49	63,252,209	51,533,188	11,719,021	11,676,526
SBH149	63,636,812	53,520,197	10,116,615	9,737,625
SBH372	61,148,224	51,363,772	9,784,452	9,338,872