The research advancement on genetics of resistance to Exserohilum turcicum in maize

As the rapid variation and mutation of the races of Exserohilum turcicum (Helminthosporium turcicum) , maize varieties lost their resistance to northern corn leaf blight (NCLB) disease caused by new races of E. Turcicum. This brought the disaster in maize production. Up to now 5 races have been found. The maize resistance to E. turcicum can be divided into quantitative and qualitative resistance, the former is associated with 10 chromosomes in maize,and the later includes genes of Ht1,Ht2,Ht3 and HtN. The race variation of E. turcicum, the original gene resources and genetic characteristics of each Ht monogenic resistance, the chromosome location of Ht1,Ht2,HtN genes,and the QTL analysis of quantitative resistant genes for E. turcicum in maize were reviewed in this paper.