Table 1.

Statistics of trimmed reads

Libraries	Total reads	Total nucleotides (nt)	Average length	GC percentage
AF	33,067,246 (1.5%)	2,426,965,166 (23.3%)	73.4	39.15% (52.7%)
AS	80,879,822 (4.6%)	6,204,420,998 (18.7%)	76.7	40.03% (50.8%)
SF	32,678,050 (1.3%)	2,410,831,266 (22.8%)	73.8	38.95% (51.9%)
SS	65,967,360 (4.5%)	5,148,749,102 (17.1%)	78.0	40.48% (50.3%)

The numbers in the parentheses indicated the trimmed proportions of reads, bases and the GC content before trimming.