Differences in the nutritional quality of improved finger millet genotypes in Ethiopia

A - Papers appearing in refereed journals

Teklu, D., Gashu, D., Joy, E., Bailey, E. H., Wilson, L., Amede, T. and Broadley, M. 2024. Differences in the nutritional quality of improved finger millet genotypes in Ethiopia. Scientific Reports. 14, p. 460. https://doi.org/10.1038/s41598-023-48749-3

AuthorsTeklu, D., Gashu, D., Joy, E., Bailey, E. H., Wilson, L., Amede, T. and Broadley, M.
Abstract

Improved crop genotypes are constantly introduced. However, information on their nutritional quality is generally limited. The present study reports the proximate composition and the concentration and relative bioavailability of minerals of improved finger millets of different genotypes. Grains of finger millet genotypes (n = 15) grown in research station during 2019 and 2020 in Ethiopia, and replicated three times in a randomized complete block design, were analysed for proximate composition, mineral concentration (iron, zinc, calcium, selenium), and antinutritional factors (phytate, tannin and oxalate). Moreover, the antinutritional factors to mineral molar ratio method was used to estimate mineral bioavailability. The result shows a significant genotypic variation in protein, fat and fibre level, ranging from 10% to 14.6%, 1.0 to 3.8%, and 1.4 to 4.6%, respectively. Similarly, different finger millets genotypes had significantly different mineral concentrations ranging from 3762 ± 332 to 5893 ± 353 mg kg−1 for Ca, 19.9 ± 1.6 to 26.2 ± 2.7 mg kg−1 for Zn, 36.3 ± 4.6 to 52.9 ± 9.1 mg kg−1 for Fe and 36.6 ± 11 to 60.9 ± 22 µg kg−1 for Se. Phytate (308–360 µg g−1), tannin (0.15–0.51 mg g−1) and oxalate (1.26–4.41 mg g−1) concentrations were also influenced by genotype. Antinutritional factors to minerals molar ratio were also significantly different by genotypes but were below the threshold for low mineral bioavailability. Genotype significantly influenced mineral and antinutritional concentrations of finger millet grains. In addition, all finger millet genotypes possess good mineral bioavailability. Especially, the high Ca concentration in finger millet, compared to in other cereals, could play a vital role to combating Ca deficiency. The result suggests the different finger millet genotypes possess good nutrient content and may contribute to the nutrition security of the local people.

Year of Publication2024
JournalScientific Reports
Journal citation14, p. 460
Digital Object Identifier (DOI)https://doi.org/10.1038/s41598-023-48749-3
Open accessPublished as ‘gold’ (paid) open access
FunderBill and Melinda Gates Foundation
Biotechnology and Biological Sciences Research Council
Funder project or codeGeoNutrition - tackling hidden hunger in Sub-Saharan Africa
Publisher's version
Output statusPublished
Publication dates
Online03 Jan 2024
Publication process dates
Accepted29 Nov 2023
ISSN2045-2322
PublisherNature Publishing Group

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