*2.5. Draft Genome Sequencing and Assembly of NEAU-SSA 1<sup>T</sup>*

For draft genome sequencing and assembly, the genomic DNA of strain NEAU-SSA 1<sup>T</sup> was extracted using the method of SDS-based DNA extraction [28]. The harvested DNA was detected using agarose gel electrophoresis and quantified using Qubit® 2.0 Fluorometer (Thermo Scientific). Whole-genome sequencing was performed on the Illumina HiSeq PE150 (Illumina, San Diego, CA, USA) platform. A-tailed, ligated to paired-end adaptors, and PCR amplified samples with a 350 bp insert were used for the library construction at the Beijing Novogene Bioinformatics Technology Co., Ltd. Illumina PCR adapter reads and low-quality reads from the paired-end were filtered using a quality control step using our own compling pipeline. All good-quality paired reads were assembled using the SOAP (Short Oligonucleotide Alignment Program) denovo [38,39] (https://github.com/aquaskyline) into a number of scaffolds. Then, the filter reads were handled by the next step of the gap-closing.
