Abstract:The methods ofdrought coefficient, cluster analysis and subordinate function were used in comprehensive evaluation for drought resistance adaptability in sweet potato cultivars. The tested components included morphological characters, plant growth, economic traits, physiological and biochemical values in the cultivars grown under water stress. On the basis of correlation analysis between the drought resistance indices obtained from the above-mentioned components and the drought resistance in cultivars, it was shown that 15 tested cultivars could be divided into four classes of tolerance . Most tolerant cultivars were Y3 and Chaoshu 1, followed by 92-111-107, Yushu 34, Nanshu 88 and 92-103-30. Less tolerant were Suyu 1, 9318-58, Yusu 303, 89-1, 95-411-153 and Ximeng. The rest 3 cultivars were not tolerate at all. Above several comprehensive evaluation methods for drought resistance adaptability in sweet potato cultivars are well coincident.
