Evaluating the best indicators and identifying the most tolerant varieties to draught in potato varieties

Abstract

In order to evaluate the drought tolerance indicators in six potato varieties of Agria, Asterix, Serenad, Draga, Diamant and Cosima and determine the best indicators and identifying the most tolerant varieties using performance measurement in normal irrigation and drought stress conditions, Two separate experiments at two irrigation regimes in a split plot design (split-plot) based on a randomized complete block were performed in Three replications in Ardabil Agricultural Research Station located in Alaroq village (12 km south of Ardabil). Six drought tolerance indices were calculated for tuber yield varieties. Geometric mean productivity index, mean productivity and stress tolerance index were highly correlated significantly with performance in both environments and were introduced as suitable indicators of identifying the probable varieties to water shortage in potato. Principal components analysis showed that 95% of the total variation is justified with the first component (tuber yield by 62%) and second component (with a tolerance of 33%). Agria and Serenad were presented d as appropriate figures in this study with high yield potential and tolerance to water deficit conditions in the experimental conditions of this study.