This paper reports on assessment of variability of iron and zinc contents in commercial sorghum cultivars being grown in India. Variability was high, and there was a positive correlation between grain iron and zinc concentrations. Compared with post-rainy season sorghums predominantly grown for food use in India, commercial hybrids grown in the rainy season possessed up to 50% higher Fe and Zn concentrations.
Kumar, K.A.; Reddy Belum, V.S.; Ramaiah, B. Biofortification for combating micronutrient malnutrition: Identification of commercial sorghum cultivars with high grain iron and zinc concentrations. Indian Journal of Dryland Agricultural Research and Development (2013) 28 (1) 95-100.