The aim of this study was to get potato varieties with a broad spectrum resistance to late blight, and understand the disease resistance of potato germplasm from home and abroad to Phytophthora infestarts. 75 potato germplasm were evaluated by inoculating P. infestans on leaves in vitro, Favorita as susceptible control. The results were as follows: based on in vitro inoculation of leaves, the control leaves with obvious disease after 5 d inoculation was set as the standard, only 12 showed moderate resistance, including 3 germplasm (Jiaxiang 1,2-2 and GS393) showed immunity to P. infestans. Thr...
