Spatio-temporal evolution of late blight resistance of potato variety in mountainous areas
XIAO Chunfang
WANG Zhen
ZENG Yuting
XU Juanni
SHEN Yanfen
GAO Jianhua
Abstract：Potato cultivation has a significant comparative advantage in the economic development of mountainous areas in China.However,late blight caused by Phytophthora infestans severely restricts the development of potato industrializa-tion.To clarify the disease resistance of major potato varieties in Enshi region,resistance identification and stability evalu-ation were conducted over two years and three locations in field disease nurseries.The resistance levels of 10 potato vari-eties to late blight was determined:Favorita and Xisen No.6 were highly susceptible,Zhongshu No.5 was susceptible,Mira and E-malingshu No.12 were moderately susceptible,E-malingshu No.10 was moderately resistant,Qingshu No.9 and E-malingshu No.5 were resistant,while E-malingshu No.13 and E-malingshu No.14 were highly resistant.The severity of disease incidence showed a highly significant negative correlation with yield.Among the varieties,E-mal-ingshu No.13 had the advantages of high resistance stability,strong environmental adaptability and high yield index.Meanwhile,potato late blight criteria were used to identify the host,and the dominant Phytophthora infestans species in different areas of Enshi was selected as race1,3,4,6,7,8,10.The research results provide a foundation for promoting po-tato variety application and late blight control in this region.
Keywords：Potato varietyLate blightResistance evaluationSpatio-temporal evolution
Publication Date：2025-09-05
Online Publishing Date：2025-09-29(First online date of this platform, not the publication date of the document)
Pages：6( 98-103 )