Variation of mineral contents with nutritional interest in a collection of Solanum tuberosum group Phureja tubers

Abstract

Summary Colombia has a biodiversity centre of diploid potatoes located at south of the country. This study evaluated the amounts of potassium (K), calcium (Ca), iron (Fe) and zinc (Zn) in a biodiversity panel of potato tubers, constituting native cultivars, accessions of the Working Collection of Potato Breeding Program at the Universidad Nacional de Colombia (CCC) and commercial cultivars. The highest quantity of minerals found were as follows: 34 333 ± 4509 mg K kg−1 potato dry weight (DW; CCC112), 1965 ± 898 mg Ca kg−1 potato DW (CCC23), 87.5 ± 8.8 mg Fe kg−1 potato DW (CCC116) and 60.7 ± 5.1 mg Zn kg−1 potato DW (CCC31). As compared to those in commercial cultivars, the currently evaluated tubers had an increase of 1.4, 12.5, 3.5 and 3.6‐fold in K, Ca, Fe and Zn. These genotypes can be used in the future breeding programmes to enhance specific mineral contents in tubers.

Red and Purple Flesh Potatoes a Healthy and Attractive Alternative Associated with New Market Trends

“…Other important nutrients in potatoes include minerals and vitamins such as potassium, magnesium, vitamin C as well as vitamin B6, among others [10,11]. Potatoes are a reliable source of ascorbic acid -ranged from to 5.8 to 21 mg of vitamin C per 100 g tuber on a fresh weight (FW) basis-, however several studies have reported changes in the content of vitamin C in potato tubers depending on variety [12,13]. Potato flesh color ranged from white to dark yellow cultivars are the most common, a recent review showed that the total carotenoids content of tubers is influenced by location, season, genotype, and their interactions, with values between 5 and 10 mg kg −1 FW of total carotenoids, for white-fleshed potatoes, to over 100 mg kg −1 FW of total carotenoids for darkyellow potatoes [14].…”