Screening of wheat genotypes for stress tolerance under field condition

Abstract

An experiment was conducted to study “Screening of wheat genotypes of stress tolerance under field condition.” was carried out at P.G.I. Farm, Department of Agricultural, Botany, Mahatma Phule Krishi Vidyapeeth, Rahuri, Dist. Ahmednagar (MS) India during the year 2015-2017. The experiment was carried out by using 14 wheat genotypes were selected after analysing the data for moisture stress tolerance and the second experiment on “Screening of wheat genotypes for stress tolerance under field condition.” In moisture stress conditions, irrigation was given at the time of sowing and at crown root initiation stages and in non-stress conditions irrigation was given at critical growth stages. Soil moisture conditions were considered as main plot treatments, Irrigation and 14 genotypes FRBD design with three replications. Plant height, number of tillers plant-1, at 50% flowering. The daily observations were recorded for phenological studies. The physiological parameters were recorded at 50% flowering. Grain yield data were used to calculate drought (moisture). Yield and yield attributes were recorded and calculated after harvesting. The results generated through the investigation are summarized as below: Under moisture stress conditions soil moisture content decreased continuously in all Moisture Regimes from sowing up to harvest. Under moisture and stress conditions available moisture and stress day factored AL declined continuously from sowing to onwards. Under non stress conditions it depends upon irrigation scheduling. The morphological or plant growth traits like plant height, number of tillers area decreased with increase in moisture stress. The maximum reduction in morphological traits caused due to moisture stress. The genotypes NI-5439 recorded maximum plant height under moisture stress conditions, whereas minimum values were reported in genotypes NIAW-3217. The genotype NIAW-3183 recorded maximum number of tiller under moisture stress conditions. Phenological study indicated that NIAW-3183 took minimum days to flower initiation, 50% flowering under moisture stress conditions. The significantly highest photosynthetic rate at 50% flowering was recorded in the genotype NIAW-3170 stress condition. The genotype NIAW-3170 showed maximum number of grains per spike, and grain yield/ha under moisture stress condition. The genotypes HD-2189, NIAW-3161 and NIAW-3166 were moisture stress susceptible genotypes. The genotypes NIAW-3170, NIAW-1415, NIAW-1994, NI-5439 and NIAW-3183 were moisture stress tolerant.