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Subject: Biochemistry × Author: Harjeet Kaur × End date: 2018 × Start date: 2018 ×
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    ThesisItemOpen Access
    Evaluation of nutritional quality and antioxidant potential of quinoa genotypes
    (Punjab Agricultural University, Ludhiana, 2018) Harjeet Kaur; Grewal, Satvir Kaur
    Thirteen quinoa genotypes (Chenopodium quinoa Willd.) were evaluated for carbohydrates composition, protein content, total lipids, minerals content and antinutritional factors such as saponins, phytic acid, tannins, and bound fructose of sucrose and raffinose series of oligosaccharides. The average value of total soluble protein, crude protein, albumin and globulin, glutenin and prolamine, total soluble sugars, starch content and total lipids in quinoa genotypes were found to be 11.77%, 18.37%, 59.19%, 30.52%, 4.37%, 39.36 mg/g, 358.24 mg/g and 11.2%, respectively. Quinoa genotypes had higher content of iron, zinc, manganese and least amount of copper. Two genotypes EC507747 and EC507749 had lower saponin content. Phytic acid and tannin content were not significantly varying in all the genotypes of quinoa. Antioxidant potential of these genotypes were estimated in terms of total phenols, flavonols, ortho-dihidroxy phenol, free radical scavenging activity (DPPH), ferric reducing antioxidant power (FRAP), total reducing power, superoxide radical scavenging activity, hydroxyl ion radical scavenging activity, nitric oxide radical scavenging activity, β-carotene, ascorbic acid and anthocyanin showed significant variation among genotypes. Two genotypes EC507738 and EC507743 had high antioxidant activity. The genotypes were divided into low, medium and high on the basis of all the above parameters studied. EC507741 genotype had high total soluble sugars, high starch, high manganese, high copper and high antioxidant potential with good yield. EC507747 genotype had high crude protein, low prolamine, high starch, high total lipids and low saponin content with better yield. The observed diversity in quinoa genotypes could be further used.