Table 1.

The remaining number of quality-controlled reads and non-redundancy contigs. Q20: quality score of 20; Q30: quality score of 30.

Process		SSR Viromes
		D39s	DA4s	DA4b
Quality control	Raw reads	4,2547,324	43,791,908	43,371,374
	Cut adaptor	40,670,620 (95.59%)	41,883,752 (95.64%)	41,353,540 (95.35%)
	Q20 >20%	35,357,306 (83.10%)	37,567,224 (85.79%)	38,397,082 (88.53%)
	Q30 >30%	35,334,370 (83.05%)	36,385,270 (83.09%)	38,203,624 (88.08%)
Assemble	All assembled contigs (>500 bp)	2,418,081	3,699,559	1,693,019
	Non-redundancy contigs	145,023	135,910	234,648
Mapping	Mapped reads	15,307,526 (43.32%)	12,760,519 (35.07%)	21,197,289 (55.49%)