Anthocyanin profile and antioxidant capacity in coloured barley

The grain of 17 coloured barley F8 recombinant inbred lines from three backcross programs using three barley parental lines were studied. The main objectives were to characterise the anthocyanin profiles and antioxidant activities of these different lines of coloured barley grain when grown in southern Italy. HPLC and spectrophotometric analyses were performed. The overall profile of anthocyanins across the grain of these genotypes comprised 51.8% malvidin 3-glucoside, 12.7% delphinidin 3-glucoside, 5.0% cyanidin, similar to 2.5% both petunidin and peonidin 3-glucoside, and similar to 1.4% both delphinidin 3-rutinoside anthocyanidin 3-glucoside, with the remaining 23% as unidentified anthocyanins. Principal component analysis showed that the antioxidant activities of the barley grain were significantly correlated with the levels of phenolic compounds. Furthermore, the grain of some of these coloured barley RILs had the highest radical scavenging activities, which indicated their potential use in preparation of both food and nutraceuticals, for protective effects on human health, and in breeding programs.