Summary of multilocus genotypes of Phytophthora infestans collected in the US and Canada, 2002-2018

12-plex multilocus genotyping was performed utilizing the methods of Li and Cooke 2013.
Genotypea Host Mating Type D13 SSR8 SSR4 Pi04 Pi70 SSR6 Pi63 PiG11 Pi02 SSR11 SSR2 Pi4B
US-8 Potato A2 108/112/0 260/266/0 284/288/294 166/170/0 192/192/0 244/244/0 279/279/0 156/160/0 268/268/0 341/355/0 173/173/0 213/225/0
US-11 Potato/Tomato A1 110/110/0 264/266/0 284/294/302 166/170/0 192/192/0 244/244/0 279/279/0 134/156/0 258/266/0 331/341/0 173/173/0 213/213/0
US-22 Potato/Tomato A2 0/0/0 260/264/0 294/296/0 166/170/0 192/195/0 242/244/0 279/279/0 134/156/0 266/268/0 341/341/0 173/175/0 213/213/0
US-23 Potato/Tomato A1 136/210/0 260/266/0 288/294/296 170/170/0 192/192/0 244/244/0 270/279/0 142/156/206 266/268/270 331/341/0 173/175/0 217/225/0
US-24 Potato A1 108/108/0 260/266/0 284/288/298 166/170/0 192/195/0 244/244/0 279/279/0 156/156/0 268/268/0 341/355/0 173/173/0 217/225/0
US-25 Potato/Tomato A2 110/110/0 264/266/0 284/300/0 166/170/0 192/192/0 242/244/0 270/279/0 134/156/0 266/268/0 331/341/0 173/175/0 205/213/0

aUS-22 caused the majority of potato and tomato late blight outbreaks in the Eastern US in 2009.