Investigation of Grain Yield, Number of Pods and Plant Height of New Soybean Lines in Sari, Gorgan, Moghan and Dezful Regions

Soybean has a lot of food and industerial uses. There is a growing demand for various soybean production, due to its nutritional value, wich included high protein and variety of vitamins and minerals. In order to evaluate and compare the yield of pure soybean lines in terms of important agronomic traits and grain yield, 20 top pure lines and two cultivars Sari and Caspian as control, were studied in a randomized complete block design with three replications, in four regions including Gorgan, Sari, Moghan and Dezful during two crop years 2017-18. It should be noted that the lines in this project were breeded and pured, through the hybridization between cultivars and selection in generations separated by pedigree and single-pod methods during the breeding programs. The results of the combined analysis showed that the response of genotypes varied during the two years and in different locations in terms of the grain yield. furthermore, the interaction between location and genotype on plant height and number of pods per plant was statistically significant. Mean comparison showed that G17 and Sari genotypes with average yield of 3215 and 3032 kg/ha had the highest grain yield in three regions of Sari, Gorgan and Moghan and were among the top cultivars in this study. G20 genotype with an average yield of 3093 kg/ha in two regions of Gorgan and Moghan, G14 with the yield of 3073 kg/ha in two regions of Gorgan and Dezful, also Caspian and G4 respectively with an average yieald of 2991 and 2944 Kg/ha in the two regions of Sari and Moghan were the superior cultivars with regard to the grain yield.