Table 1. Descriptive summary of non-coding RNAs reads.

IDa	Raw Reads	Clean reads	Percent (%)b	Annotated reads	Perfect matchesc	Reads Annotatedin in miRBase21.0 (Gallus gallus)	Reads Perfect matches in miRBase21.0 (Gallus gallus)
L20-1	20,905,809	20,300,052	97.1%	17,392,373	14,041,252	12,170,502	10,089,552
L20-2	27,180,553	26,552,542	97.7%	22,368,399	17,966,690	15,306,101	12,614,600
L20-3	14,913,255	14,540,987	97.5%	11,482,606	9,233,371	7,377,736	6,131,583
L30-1	20,677,403	19,561,788	94.6%	14,870,023	11,687,333	9,079,113	7,804,188
L30-2	15,124,850	13,450,426	88.9%	7,916,715	6,298,661	4,594,483	4,070,144
L30-3	21,846,238	21,273,115	97.4%	10,503,394	7,951,605	3,972,398	3,431,075

^aL20, liver samples from 20-week-old layer hens; L30, liver samples from 30-week-old layer hens.

^bPercent, clean reads/raw reads.

^cPerfect matches, reads that matched the reference genome completely.