| Abstrakt: |
In order to evaluate the drought resistance of peanut varieties and screen drought resistant geno-types, this stud)' selected 68 peanut varieties widely grown in China and planted them in well-watered and drought stress environments, respectively. The correlation, diversity index and clustering analysis of these materials were analyzed based on drought tolerance index of 5 agronomic traits and comprehensive appraisal D value of 2 physiological index. The results showed that the drought tolerance index of pod numbers per plant had the widest variation from 0.51~1.75 and the average coefficient of variance (CV) was 21.54%. The drought tolerance index of branch numbers had the smallest CV of 13.55%. Under different water stress, the grain yield stability was affected by the numbers of branch, bearing branch, bearing node, pods per plant, chlorophyll content and canopy temperature. The variation range of different traits diversity indices were from 1.67~2.09. The experimental materials were clustered into 4 groups, the I group showed the strongest tolerance to drought and the III group displayed the poorest drought tolerance. The varieties named Jihua 2 and Jihua 4, Fenghua 1, Huayu 20, Tianfu 11 and Kainong 8 had better drought resistance. The identification of varieties drought resistance would provide basis for selecting drought resistant parents in breeding. [ABSTRACT FROM AUTHOR] |
