Variation of agronomic traits in soybean lines resulted from crossing of Karbin × Fora

To study the genetic diversity of soybean inbred lines, grain yield modeling and selection of superior genotypes, 80 lines of soybean obtained from crosses of Karbin × Fora cultivars along with L.17 soybean cultivar as control were studied in research farm of Agriculture Khorram Abad Sarab Chenghaey in 9 ×9lattice design. Significant differences were observed between control and studied soybean lines.  There was a positive and significant correlation between seed yield and most of the traits evaluated, including the number of pods per plant, percentage of germination, plant height, number of seeds per pod, and number of seeds per plant. Stepwise regression analysis showed that plant height, number of pods per plant, number of seeds per pod and 100-seed weight explained 82% of yield. Using factor analysis, 17 traits in four components explained about 62% of the total variation. Therefore, plant height trait, number of pods per plant, number of seeds per pod, 100-seed weight can be considered as criteria for selection of superior lines to improve grain yield in soybean.