Sumac from Anacardiaceae family can be as ornamental plant because it has many ornamental features that could be considered in urban planting designs while its natural distribution is on foothills of many parts of northern Iran. The sumac accessions from ten regions of Iran were investigated. Oil content (OC), thousand fruit weight (FW), thousand fruits epicarp weight (EW), and thousand fruits core weight (CW) were measured. The genotype by trait biplot model was used and showed that the first two principal components were explained 63% and 30% of observed variance, respectively. The vector-view of biplot showed that FW and EW were positively associated, while they showed weak positive correlation with CW. The oil content, showed nearly zero correlation with the FW, EW and CW. Due to importance of the oil content, we ranked all entries relative to the oil content, and found that the best performance to the oil content, was due to the genotype Arasbaran. The high variability of the genotype Arasbaran regarding the oil content revealed that genotype Tehran was better because its variability is less than genotype Arasbaran due to small distance from axis. In conclusion, according to this investigation, it can be advised that the genotypes Arasbaran and Tehran, could be used for achieving high economic gain in sumac.
