Determining Total Phenolics and Antioxidant Activity of Selected Fragaria Genotypes

Abstract

Strawberries are known to have high antioxidant properties. In present study, we determined total phenolics and antioxidant activity of a group of Fragaria genotypes representing the Turkish diploid strawberry genotypes, dominating cultivars and some selections and hybrids. The average total phenolic compounds and antioxidant capacities were highest in wild material 7914 μg GAE/gfw and 70.2 μmol TE/gfw, respectively. The average of total phenolic compounds for hybrids was the highest (2467 μg GAE/gfw) and followed by selections (2395 μg GAE/gfw) and varieties (2318 μg GAE/gfw). The values increased during the season progress. A similar trend was observed on antioxidant activity of selected strawberries. The antioxidant capacity in the wild material was detected more than 3 fold higher than the F. ×ananassa groups (70.2 vs. 19.9, 21.4, 21.1 μmol TE/gfw). The present results showed that there is a great variability among the strawberry genotypes tested for total phenolic compounds and antioxidant capacities. Therefore, in addition to taste and aroma characteristics high antioxidant properties should be important for cultivar selection by consumers and breeders for healthy diet.