EFFECT OF SEED PRIMING ON GRAIN YIELD AND YIELD COMPONENTS OF BREAD WHEAT (Triticum aestivum L.)

In order to evaluate the effect of seed priming on seedling emergence, grain yield and yield components of wheat, a 2-year experiment was conducted at Seed and Plant Certification & Registration Institute (SPCRI) in Karaj, Iran, from 2008-2010. Two cultivars (Azar-2, Sardare-101) × four priming media and control (unsoaked) were used in this experiment in field. Seeds were primed for 12 hour and 20°C in four priming media (PEG 10%, KCl 2%, KH2PO4 0.5%, distilled water) and control. Results of comparing means showed that osmotic priming with PEG10% had positive significant effects on emergence percentage, straw, grain and biological yield compared to other seed priming treatments (KCl 2%, KH2PO4 0.5% and distilled water). It was recognized that the maximum straw, biological yield, kernel weight, number of spikes per m 2 was obtained from Sardari-101 meanwhile the highest number of kernels per spike was achieved from Azar-2. Results of interaction between year × seed priming treatment showed that maximum seed yield was obtained from PEG 10% and Sardari-101 (with average of 420 gr/m2 ).

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