Rhus coriaria L. with good ornamental potential could be regarded in urban and inurbane areas while its natural distribution is reported in many areas of Iran. The sumac accessions from nine regions of Iran were studied for some biochemical components including total phenol content (PC), total flavonoid content (FC), total tannins content (TC), total anthocyanin content (AC) and DPPH (2,2- diphenyl-1-picrylhyrazyl). According to which-won-where tool of biplot, there were four vertex accessions as: Yazd, Tehran, Paveh and Kashmar. The Paveh accession was the accession for obtaining high amounts of DPPH, FC, and PC while Kashmar accession was the accession for obtaining high amounts of TC and AC. The other vertex accessions (Yazd and Tehran) were not best for any of the measured traits. Also, the Paveh accession was better than accession within its sector (Yasuj), the Kashmar was better than accession within its sector (Maragheh), the Tehran was better than accession within its sector (Qom), and the Yazd was better than accessions within its sector (Kerman and Tovrivar). The Paveh, Yasuj, Kashmar and Maragheh were the nearest Entry (accession) to position of Ideal Entry pattern of biplot followed by Qom, Kerman, Tovrivar and Yazd. In conclusion, according to this investigation, it can be advised that the genotypes Kashmar and Paveh, could be used for achieving high gain in sumac.
