The Effect Of Sowing Depth And Short Periods Of Water Stress On Ability Of Wheat Seedlings Recovery And Their Correlation With Seedling Vigor And Drought Tolerance
2006
Saeidi, M., PhD Student and member of young Resear Chers club of Iran, | Ahmadi, A., Member of Scientific Board of Agricultural College of Tehran University, | Poustini, K., Member of Scientific Board of Agricultural College of Tehran University, | Jafari, A.A., Member of Research Institute of Forests
To evaluate the ability of genotypes to emerge from different sowing depth and the ability of genotypes to tolerate different periods of water stress at tillering stage and their relationships with seedling vigor, yield and drought resistance, 10 genotypes of wheat were selected and studied in a series of field, greenhouse and laboratorial experiments. These genotypes included Improved Indigenous (II) genotypes (Sardary, Roushan, Omid), Improved Indigenous Foreign Crossed (IIFC) (Azadi, Falat, Qods) and four Indigenous lines (IL) (5593/2-3, 6452-6, 5806-3, 7007/2-6). Based on the drought sensitivity/resistance indices, Qods, Azadi and Roushan were considered as resistance, Omid, Falat, Sardary, 5593/2-3 and 5806-3 as semi-resistance and 6452-6 and 7007/2-6 as sensitive genotypes. The percentage and the speed of emergence reduced significantly with increase in sowing depth. Omid, Roushan, Sardary and 5593/2-3 genotypes showed the highest percentage and speed of emergence. Under period of water stress in tillering stage among Sardary, Omid, Falat and Qods genotypes, sardary did not recover upon rewatering and died while falat showed the highest level of recovery. In this experiment Sardary was evaluated as a sensitive and Falat as a tolerant genotypes. Table of correlation coefficients did not show a significant correlation between emergence traits with yield and drought resistance.
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