Dynamics of Pyricularia oryzae Population Race Structures from 2003 to 2017 in Jiangsu Province, China

Rice blast, caused by Pyricularia oryzae, is one of the most destructive rice diseases worldwide. It essential to understand population structure and race distribution P. oryzae for prevention control blast. This study collected 1584 isolates across Jiangsu province from 2003 2017 determine diversity, common dominant structures, resistance profiles using eight parameters Chinese differential cultivars (CDC) entries. Race diversity analysis indicated that in increased 2006 fluctuated steadily 2007 2017. Common showed wildly on an annual basis. Moreover, ZG1 was race, suggesting commonly grown varieties are highly adaptive ZG1. In addition, due a higher level (>85%) 2017, Tetep may be conformed as promising donor blast breeding province. summary, it beneficial continuous monitoring with monogenic germplasm entries maintaining varieties.