Semere, T.; Tsehaye, Y.; Tareke, L.; Westengen, O.T.; Fjellheim, S. Nutritional and Antinutritional Potentials of Sorghum: A Comparative Study among Different Sorghum Landraces of Tigray, Northern Ethiopia. Agriculture2023, 13, 1753.
Semere, T.; Tsehaye, Y.; Tareke, L.; Westengen, O.T.; Fjellheim, S. Nutritional and Antinutritional Potentials of Sorghum: A Comparative Study among Different Sorghum Landraces of Tigray, Northern Ethiopia. Agriculture 2023, 13, 1753.
Semere, T.; Tsehaye, Y.; Tareke, L.; Westengen, O.T.; Fjellheim, S. Nutritional and Antinutritional Potentials of Sorghum: A Comparative Study among Different Sorghum Landraces of Tigray, Northern Ethiopia. Agriculture2023, 13, 1753.
Semere, T.; Tsehaye, Y.; Tareke, L.; Westengen, O.T.; Fjellheim, S. Nutritional and Antinutritional Potentials of Sorghum: A Comparative Study among Different Sorghum Landraces of Tigray, Northern Ethiopia. Agriculture 2023, 13, 1753.
Abstract
Sorghum is one of the staple food crops in Tigray, northern Ethiopia. Despite this, limited research attention was given to nutritional and antinutritional profiling of sorghum. Thus, this research was investigated to profile and evaluate the variabilities in protein, starch, minerals, flavonoid, tannin, and antioxidant activities among sorghum landraces of Tigray, northern Ethiopia. Protein and starch were analyzed using near infrared spectrophotometer and whereas mineral elements were estimated using atomic absorption spectrophotometer. Antioxidant activity was analyzed using DPPH free radical scavenging, ferric reducing antioxidant power, and phosphomolybdenum assays. The result revealed significant variation among the landraces for all the evaluated parameters. Protein and starch contents were ranged from 6.21 to 18% and 33.42 to 78.30%, respectively. Wider variations were observed for Fe (32-101), Zn (16.9-42.98), Cu (1.48-5.25), Mn (9.21-20.23), and Cr (0-1.5) as measured in mg/100g. The variabilities were high for total flavonoid (0-665 mgCE/g) and tannin (0.18-7.5 mgCE/100g). DPPH (EC50= 29.09-818.37 µg/ml), ferric reducing antioxidant power (17.85-334.81 mgAAE/g) and total antioxidant activity (1.71-63.88 mgBHTE/g) were also highly variable among the samples. Flavonoid and tannin were strongly correlated (r = 0.90) with antioxidant activity. The relationship between seed color and phenolics as well as antioxidant activities are discussed. Multivariate analysis revealed that the landraces were clustered in to four distinct groups. The rich genetic diversity in the nutritional and antinutritional attributes may be an opportunity for breeding for grain quality improvements of sorghum that in turn helps in addressing malnutrition.
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