Serial Transcriptome Analysis Reveals Genes Associated with Late Blight Resistance in Potato Cultivar Qingshu 9

The late blight caused by Phytophthora infestans (P. infestans) has been a major constraint for worldwide sustainable potato production. Chinese cultivar Qingshu 9 shown excellent field performance against blight. To understand the mechanism underlying its resistance, transcriptomic dynamics of infected with P. was systematically investigated to identify resistance-related genes. In total, 2027 shared differentially expressed genes (DEGs) were identified when at 24, 48 and 72 h post-inoculation. Based on k-mean cluster analysis, DEGs showed four types expression patterns, suggesting their divergent functions in response infection. KEGG enrichment analysis that significantly enriched involved biosynthesis secondary metabolites, plant–pathogen interaction, photosynthesis. Furthermore, 980 transcription factor belonging 68 families found DEGs, which AP2-EREBP MYB most abundant. Moreover, many related disease resistance differential during Finally, nine validated quantitative real-time PCR. These results provide valuable information understanding 9.