چکیده
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Potatoes are a staple food with high antioxidant properties that can positively affect
population health. The beneficial effects of potatoes have been attributed to tuber quality. However,
the tuber quality related researches at genetic levels are very few. Sexual hybridization is a powerful
strategy for producing new and valuable genotypes with high quality. In this study, 42 breeding
potato genotypes in Iran were selected based on appearance characteristics such as shape, size, color,
eyes of tubers, and tuber yield and marketability. The tubers were evaluated for their nutritional
value and properties, viz. phenolic content, flavonoids, carotenoids, vitamins, sugars, proteins, and
antioxidant activity. Potato tubers with white flesh and colored skin had significantly higher levels
of ascorbic acid and total sugar. The result showed that higher phenolic, flavonoid, carotenoid,
protein concentration, and antioxidant activity were noted in yellow-fleshed. Burren (yellow-fleshed)
tubers had more antioxidant capacity in comparison to genotypes and cultivars, which did not differ
significantly with genotypes 58, 68, 67 (light yellow), 26, 22, and 12 (white). The highest correlation
coefficients in antioxidant compounds were related to total phenol content and FRAP, suggesting
that phenolics might be crucial predictors of antioxidant activities. The concentration of antioxidant
compounds in the breeding genotypes was higher than in some commercial cultivars, and higher
antioxidant compounds content and activity were detected in yellow-fleshed cultivars. Based on
current results, understanding the relationship between antioxidant compounds and the antioxidant
activity of potatoes could be very helpful in potato breeding projects
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