GENOTYPE × ENVIRONMENT INTERACTION IN WHEAT (Triticum aestivum L.) UNDER DROUGHT STRESS

Abstract

An experiment was conducted at the experimental field of the Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh during the period from November, 2016 to April, 2017 with eleven wheat genotypes collected from Wheat Research Centre, BARI, Dinajpur. The genotypes were namely- BARI GOM 22, BARI GOM 23, BARI GOM 24, BARI GOM 25, BARI GOM 26, BARI GOM 27, BARI GOM 28, BARI GOM 29, BARI GOM 30, BAW 1194 and BAW 1200. Data were recorded on the following crop characters; days to 50% germination, days to 50% heading, no. of tillers/plant, no. of spikes per square meter, plant height, days to maturity, spike length, no. of spikelet per spike, no. of grains/spike, yield per plant, thousand grain weight, plot yield. The wheat genotypes were evaluated in randomized completely blocked design with three replications to study genotype × environment interaction under drought stress and to determine stable genotypes under drought stress condition. Different stability models to estimate the stability of genotypes, Eberhart and Russell‟s joint regression model, AMMI model, AMMI Stability Value (ASV), Yield Stability Index (YSI), GGE Bi-plot and Shukla stability analysis were used in this experiment. All stability analysis revealed that BARI GOM 23 and BARI GOM 24 were more stable and desirable genotypes for drought stress condition in wheat. These two genotypes also showed maximum plot yield, yield per plant, number of spikelet per spike, spike length, plant height and also required comparatively less days to maturity. The study selected two genotypes, BARI GOM 23 and BARI GOM 24 were the most stable and desirable genotypes under drought stress condition with reasonable good yield among the all.