title: Whole genome re-sequencing of Xcc races
design: The pre-processing process for short  reads is to remove the PCR duplicates and then the adapter sequences were removed with cutadapt.afterwards, the Dynamic Trim and LengthSort programs of the SolexaQA package were used for quality trimming. DynamicTrim performs the process of cutting out bad quality bases at both ends of short reads according to phred score and refining them into good quality cleaned reads, and LengthSort performs the process of removing reads with too many bases cut out in Dynamic Trim. Dynamic Trim uses a phred score 20, and the LengthSort process uses a short read length  25bp.