Nutritional composition and antioxidant capacity of common bean (Phaseolus vulgaris L.) core collection

Abstract

Variation of common bean (Phaseolus vulgaris L.) core collection was assessed based on the main nutritive and bioactive components. Nutritional profile was described for each cultivar and landrace. Protein content was in the familiar range for common bean (19.6-31.6%). Detected variability for potassium, sulphur, iron and zinc was 7.78, 16.7, 14.99, and 40.17%, respectively. Total phenolic content ranged from 1.8 to 14.1 mg GAE /g DW, with high variation (CV = 41.3%). Likewise, antioxidant tests DPPH, ABTS and FRAP had high, genotype-based, CV in range 29-46%. With the application of PCA and cluster analysis, better insight in underlying germplasm structure was acknowledged, as well accession’s grouping based on the studied traits. Cultivars Vulkan and Panonski tetovac, breeding line HR45, landraces L24, L92, L119, L120, and L125 had larger amounts of iron, nitrogen, and proteins. Elevated phenolic content was observed in cultivars Balkan and Spinel, as well as landraces L19, L29, L41 and L60. In addition, cultivar Royal Dutch was recognized for higher levels of zinc, and higher antioxidant capacity revealed by DPPH, ABTS, and FRAP assays. Therefore, these tests could be used in the selection of the accessions for breeding for nutritive quality enhancing.