The Study of Effects Drought Stress on Yield and Yield Components of Promising Lines of Wheat in Cold Regions

In order to study of seed yield new bread wheat varieties under drought stress at cold area, the experiment was carried out based on complete randomized design (RCBD) with three replications. Results showed that, there were significant differences among genotypes for grain yield and biological yield, straw, grain weight, spike weight, grain weight and plant height. The highest yield belong to number C-84-2 with 6.02 (ton/ha) and the lowest yield belong to number C-84-13 with 3.67 (ton/ha). There was not effect of drought stress on plant height and the related morphological traits.