Abstract

In order to determine the yield gap of the common wheat cultivars in Ardabil region, an experiment was carried out in a randomized complete block design with three replications in Ardabil Islamic Azad University Agricultural Research Station in two agricultural years of 2014–15 and 2015–16. The studied cultivars included Pishgam, Gaskogen, Gaspard, Siosson and MV 17. In order to evaluate the actual yield, 30 farms from three different locations (from villages of Namin County and Ardabil) were chosen and during two agricultural years of 2014–15 and 2015–16, all management factors were completed and collected during the growing season and ultimately, the seed yield was measured by the help of the farmers. After measuring the seed yield in the research center and field, the yield gap was estimated. Analysis of variance results suggested that there was a significant difference between the studied cultivars in the research center and the field on seed yield at one per cent. Also, results showed that there was no significant difference found between the years and the interaction of the year on cultivar. Data mean comparison results in the research center indicated that Siosson with the mean of 6,627.7 kg/ha had the highest seed yield and MV17 with the mean of 5,498.5 kg/ha had the lowest seed yield. Also, data mean results in the field showed that Pishgam with a mean of 5,900 kg/ha had the highest seed yield and MV 17 with a mean of 4,340.8 kg/ha had the lowest seed yield. By studying the yield gap, the results showed that the highest yield gap in 2014 was related to MV 17 in Location 2 with 2,367 kg/ha and the lowest yield gap for this year was related to Pishgam in Location 2 with a mean of 84 kg/ha. The highest yield gap in the second year (2015) was related to MV17 in Location 2 with 2,305 kg/ha and the lowest yield gap for this year was related to Pishgam in Location 2 with a mean of 63 kg/ha.