Nutritional Composition of Potato (Solanum tuberosum L.) Genetic Resources

Seventy-one germplasm lines comprising of commercialIndian potato cultivars, advanced clones exotic and indigenous cultivars were evaluated for nutritional compounds.We observed significant variability in the lines for anthocyanins (1.81-17.20 mg/100 g FW), carotenoids (4.75-27.75g/g FW), ascorbic acid (14.50-85.00mg/100 g FW) and total phenolics (19.22-73.54mg GAE/100 g FW).However, for zinc (10.62-27.58ppm), iron (30.49-56.29 ppm), and tuber dry matter content (14-26%), only small variations were found.The anthocyanin, carotenoids, and total phenolic contents of indigenous cultivars and nutrient-rich advanced clones were generally much higher than those of the common variety.It is interesting to note that anthocyanin (r = -0.46;-0.43), total carotenoids (r = -0.47;-0.38), ascorbic acid (r = -0.27;-0.24) and tuber dry matter (r = -0.21,-0.24) all had negative correlations with marketable and total tuber yield respectively.Cluster analysis revealed that genotypes from clusters 1 and 3 can be used in bio-fortification breeding.The results of this study also reveal that two genotypes, viz.JEX/A-122 (Andigena line) and Kala Aloo (indigenous line) may be used as breeding material to develop nutrient-rich potato varieties.