Study on Comprehensive Assessment and Mechanism of Drought Resistance in Peanut Cultivers

The relationship between several physiological indexes and drought resistance in pod culture with rain proof shelter was studied with six peanut varieties. The results showed that the correlative relationship between those indexes and drought resistance of the varieties was in such order: MDACATThe content of soluble protein (Pr)Root system vigour (TTC)Photosynthetic rate (Pn.)Transpiratio rate (Tr). The correlative coefficient between the weighted average of subordinate function values (D) of those six physiological indexes and drought resistance was positively significant (r=0.93; P0.01). The first four places of the indexes could approximately substitute for the first six indexes (73.95%). The results suggested that the comprehensive physiological indexes for water stress might be used for indirect assessment and grading of the drought resistance of peanut varieties in the field. In addition, the breeder could grasp the mechanism of drought resistance of each variety and know the improvement direction by the quantitative analysis of the drought resistance characters of each variety.