Fig 1. Developmental onset of the adult plant resistance phenotype of Hm1^A.

(A) A seedling Hm1^A leaf exhibiting susceptibility to Cochliobolus carbonum race 1 (CCR1) at the 2-week age. (B) A 9-week old Hm1^A leaf completely resistant to CCR1. (C) The disease/resistance phenotype of Hm1^A plants homozygous and heterozygous (Hm1^Ahm1^Pr) for the APR allele to CCR1 at weekly intervals from week-1 through week-10. Ratings were established by controls Hm1^B73Hm1^B73 (rated 1 and resistant throughout) and hm1^Prhm1^Pr (rated 10 and susceptible throughout). All hm1 alleles were in the B73 genetic background. Error bars represent standard error calculated using R statistical package.