عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The effects of seed priming with three antigibberellin regulators on yield and yield components of wheat, cv. Azar 2, under regular irrigation conditions were evaluated in a field experiment in University of Zanjan research station. Treatments included control or non-primed seeds, hydropriming, chlormequat chloride (400, 800, 1200 and 1600 μM), paclobutrazol (35, 70, 105 and 140 μM) and ancimidol (10, 20, 30 and 40 μM). The biological yield in most treatments decreased compared to control. On the other hand, seed priming with all of growth retardants increased the grain yield. Among mentioned growth regulators, paclobutrazol in 140, ancymidol in 20 and chlormequat chloride in 800 μM had highest effect on grain production. Seed priming with mentioned growth retardants improved 1000 kernel weight compared to control. The highest fertile spike/m2 and seed/spike was found in 800 μM chlormequat chloride and 20 μM ancymidol, respectively. By increment in the number of fertile spikes, the length of spike decreased significantly. As a result, there are smaller spikes but with large grains in each plant. It seems that Azar 2 has a potential for increase number of grain/spike and grain weight. Therefore, in this cultivar it is possible by improving sink straight from both ways may increase grain yield.