Comparing Antioxidant Activity and Stilbenic and Flavonoid Compounds for Selecting Korean Wild Grapes Useful for Grape Breeding

Contents of stilbene compounds including resveratrol, piceid, and piceatannol, contents of total phenol and flavonoid compounds, and antioxidant activities were investigated in 19 lines of grapes including 13 lines of Korean wild grapes (Vitis spp.). There are relatively high contents of trans-resveratrol in berries of 'Vc-1-09-22', 'Vc-3-09-05' (V. coignetiae), and 'Vf-2' (V. flexuosa)'. There is relatively high content of trans-resveratrol in 'Va-1' (V. amurensis) compared to 'Campbell Early' and 'Kyoho', grape cultivars. There are high contents of total stilbenic compounds in 'Vc-3-09-05', 'Vc-1-09-22', 'Vf-1', 'Vf-2', and 'Va-1', as well as total phenol and flavonoid compounds in 'Vf-GS', 'Va-CS', and 'Vc-3-09-05'. There were high contents of both trans-resveratrol and total phenol and flavonoid compounds in 'Vc-3-09-05'. High activities of antioxidant such as scavenging ABTS radicals and DPPH were detected in extracts from 'Vc-1-09-22' and 'Va-1' berries. Quantification analysis of qualitative data showed that 'Vc-1-09-22', 'Vc-3-09-05', 'Vf-2', and 'Va-1' berries have high contents of stilbenic, phenol, and flavonoid compounds and high antioxidant activities. Korean wild grape lines selected by statistical quantification analysis can be utilized as valuable genetic resources for efficiently breeding grapes with biological activities in the future.