Table 1. Small RNA sequencing statistics for the dry period (D) and peak lactation (P) libraries.

	Dry period library (D)		Peak lactation library (P)
Category	Total reads (%)	Unique reads (%)	Total reads (%)	Unique reads (%)
raw reads	15706825		17349265
High quality	15632233 (99.5%)		17220358 (99.3%)
3′adapter null	15496 (0.10%)		19367 (0.11%)
Insert null	15085 (0.10%)		10406 (0.06%)
5′adapter contaminants	78042 (0.50%)		49684 (0.29%)
Smaller than 18nt	671847 (4.30%)		1427823 (8.23%)
polyA	388 (0.00%)		187 (0.00%)
Clean reads	14851375 (94.55%)	788915	15712891 (90.57%)	1108514
Mapped to genome	10615964(67.59%)	227399 (28.82%)	8097817 (46.68%)	246825 (22.27%)