Whole-Genome Sequencing and Analysis of Cercospora Sojina Race 15

The new Race 15 of Cercospora sojina has infectivity and physiological race differentiation, which has caused the breakdown of resistance in most soybean cultivars. To analyze its infection mechanism at the genome level, this research adopted the whole-genome sequencing for preliminary genomics research. The results showed that 601 794 high quality reads were generated by PacBio sequencing, covering 6 038 283 778 bp in total, and having a mean length of 10 033 bp and an N50 length of 13 900 bp. The genome of the Race 15 strain of Cercospora sojina（40.12 Mb） consisted of 12 curated contigs, with an 4.9 Mb N50, and 12 607 coding genes were predicted with a gene density of approximately 314 genes per Mb. Additionally, non-coding genes were predicted, with 200 tRNA, 2 sRNA and 13 snRNA genes being predicted in the genome of Race 15. A total of 680 genes were annotated and classified using the PHI database, 340 genes were annotated in the CAZy database, 777 genes were predicted to be related to secondary metabolism and 766 genes were predicted as secretory proteins. These virulence-related pathogenic genes are mainly involved in cell wall degrading enzymes, fungal morphology, toxins and pigment biosynthesis.