DNA fragments with ligated adapter molecules on bothe nds were selectively enriched using an Illumina PCR Primer
Cocktail in a 10 cycles PCR reaction. Products were purified using
an AMPure XP system (Beckman Coulter, Beverly, USA) and quantified
using the Agilent high sensitivity DNA assay on the Agilent
Bioanalyzer 2100 system.
The clustering of the index-coded samples was performed on a
cBot Cluster Generation System using a TruSeq PE Cluster Kit
v3-cBot-HS (Illumia, San Diego, USA) according to the instructions
of the manufacturer. After cluster generation, the library preparations
were sequenced on an Illumina Hiseq 2000 platform and
100 bp paired-end reads were generated.