Physiological Indices and Yield Traits of Wheat Genotypes under Drought Stress Condition

Abstract

We assessed the physiological parameters and yield traits of wheat genotypes under water limiting drought condition following split plot design with three biological replications at Department of Crop Physiology and Ecology, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh. The main plot treatment consisted of two water regimes (adequate water and drought condition) while four wheat genotypes (E 38, BAW 1118, BARI Gom 26 and BAW 1130) were assigned as sub-plot treatments. We observed that physiological traits of wheat were adversely affected due to drought environment than normal condition. Even yield of genotypes greatly reduced (37.03-54.44%) because of water scarcity in drought plots. However, wheat genotypes BAW 1118 and E 38 revealed more chlorophyll steadiness, more capability to conserve sufficient water and content of higher proline, soluble sugar and cell membrane stability as compared to BARI Gom 26 and BAW 1130 under water deficit condition. The order BAW 1118 > E 38 > BARI Gom 26 > BAW 1130 was exposed as the imperious level of tolerance centered on their yield. Yield contributing factors, for instance, different spikes characteristics and thousand grain weights at water deficiency situation assisted to enhance greater tolerance of BAW 1118 and E 38 genotypes.