不同花生品种对花生镰孢菌根腐病及叶斑病田间抗性评价OA北大核心CSTPCD

To identify the peanut varieties'resistance against Fusarium root rot and leaf spot,an experiment with fifty peanut varieties as material were carried out in natural disease nursery in Laixi,Shan-dong Province from 2021 to 2023.The results showed that different peanut varieties had different resistance a-gainst Fusarium root rot and leaf spot.According to disease index,relative resistance index and stratified cluster analysis,the peanut varieties were divided into three categories:medium resistance,susceptible and highly susceptible.Ten medium resistant varieties against Fusarium root rot were obtained and four peanut varieties were identified as medium resistant against leaf spot.In particular,only Yuhanghua7 showed moder-ate resistance against both Fusarium root rot and leaf spot.In addition,it was found that the proportion of medium resistant materials in small-kernel type peanut was higher than that in big-kernel type peanut,but the proportion of highly sensitive materials was less,indicating that small-kernel type peanut had more advan-tages in resistance against Fusarium root rot and leaf spot.This study provided the basis for breeding peanut resistant varieties,research on resistance mechanism and prevention of root rot disease.