甘薯品种抗旱适应性综合评价的方法研究

在对水分胁迫下甘薯形态、生长势、生理生化和产量性状等指标与品种抗旱性进行相关分析的基础上,采用抗旱系数法、聚类分析法、隶属函数法对品种抗旱适应性予以综合评价.综合评价的结果,将15个供试甘薯品种按抗旱水平由弱到强划分为不抗（农大红、漳薯1号、8908-383）、低抗（宿芋1号、9318-58、渝苏303、89-1、95-411-153、西蒙1号）、中抗（92-111-107、渝薯34、南薯88、92-103-30）和高抗（Y3、潮薯1号）四级.上述几种关于甘薯品种抗旱适应性综合评价的方法具有较好的一致性.

Methods of Comprehensive Evaluation for Drought Resistance in Sweet Potato Cultivars

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.