Traditional and indigenous foods for food security and sovereignty

The world faces a formidable challenge: to feed an increasingly hot and hungry plant. Despite some achievements in meeting global food demand, the prevalence of malnutrition remains high particularly in low and middle-income countries. It is predicted that food system shocks such as climate change and the COVID-19 pandemic will negatively impact agricultural production and exasperate the prevalence of malnutrition. Moreover, low biodiversity among food crops further threatens agroecological issue. The promotion of neglected and underutilized African, EurAsian, American, and Australian indigenous and traditional foods (AITFs) around the globe is one way that agriculture can diversify to better serve human nutritional and ecosystem service needs. A holistic enabling environment that utilizes a systems approach is needed for global food security and food sovereignty under worsening climate change conditions. Market-first, science-driven solutions that combine concepts from food security and food sovereignty discourse need to incorporate a community resiliency framework that rebuilds local economies, regenerates ecosystems, and mitigates climate impact. This model engages farmers and consumers directly in the formulation of the research agenda and actively involves them in the process of technological innovation and dissemination through hands-on demonstrations and storytelling that captures shared experiences, strengthening local community resilience and improving nutrition outcomes. This paper will use the dual concept of food security and sovereignty as a framework for the promotion of consumption and production for various markets (e.g., local, national, international) of indigenous and traditional foods in EurAsia, Africa, the Americas, and Australia through four pillars: availability, affordability accessibility, and acceptability. © 2023 Elsevier Ltd. All rights reserved

Influence of blend proportion and baking conditions on the quality attributes of wheat, orange-fleshed sweet potato and pumpkin composite flour dough and bread: optimization of processing factors

Orange-fleshed sweet potato (OFSP) and pumpkin fruit are underutilized crops with great potential for the production of high-quality bread with health-enhancing properties. However, the incorporation of nonconventional flour in bread formula may influence the dough and bread quality properties. This study investigated the effect of partial substitution of wheat flour with OFSP (10–50%) and pumpkin flour (10–40%), baking temperature (150–200 °C) and baking time (15–25 min) on the quality properties of the composite dough and bread using response surface methodology (RSM). Dough rheological, bread physical and textural properties were analyzed, modelled and optimized using RSM. Satisfactory regression models were developed for the dough and bread quality attributes (R2 > 0.98). The dough development time, crust redness, hardness, and chewiness values increased while optimum water absorption of dough, specific volume, lightness, springiness, and resilience of bread decreased significantly (p < 0.05) with increasing incorporation of OFSP and pumpkin flour in the bread formula. Additionally, the specific volume, crust redness, crumb hardness, and chewiness of the composite bread increased significantly (p < 0.05) with increasing baking temperature from 150 to 180 °C but reduced at higher baking temperatures (≥ 190 °C). The staling rate declined with increased OFSP and pumpkin flour whereas increasing the baking temperature and time increased the bread staling rate. The optimized formula for the composite bread was 78.5% wheat flour, 11.5% OFSP flour, 10.0% pumpkin flour, and baking conditions of 160 °C for 20 min. The result of the study has potential applications in the bakery industry for the development of functional bread.

Increase of nutritional security in Sub-Saharan Africa through the production of dried products from underutilized crops

Currently, an estimated 20% of the population in Sub-Saharan Africa is food insecure with the incidence of hunger and malnutrition still rising. This trend is amplified by the socio-economic consequences of the COVID-19 pandemic. In contrast, more than a third of the harvestable perishable produce is lost due to a lack of preservation or failure to utilize preservation as is the case for underutilized crops (UCs). Moreover, some of the preservation techniques utilized are poor, leading to the deterioration of food quality, especially the micronutrients. In this study, we thus exemplarily investigated the impact of different drying settings on the quality of two highly nutritious UCs, namely cocoyam and orange-flesh sweet potato (OFSP) (40, 60, and 80 °C for cocoyam and 40, 50, 60, and 70 °C for OFSP) to deduce the optimum quality retention and further develop a theoretical design of processing units and processing guidelines for decentralized food processing. Drying cocoyam at 80 °C and OFSP at 60 °C, respectively resulted in a relatively shorter drying time (135 and 210 min), a lower total color difference (2.29 and 11.49-13.92), greater retentions for total phenolics (0.43 mg GAE/100 gDM and 155.0-186.5 mg GAE/100 gDM), total flavonoid (128 mg catechin/100 gDM and 79.5-81.7 mg catechin/100 gDM) and total antioxidant activity (80.85% RSA and 322.58-334.67 mg AAE/100 gDM), respectively for cocoyam and OFSP. The β-carotene, ascorbic acid and vitamin A activity per 100 gDM of the OFSP flours ranged between 6.91- 9.53 mg, 25.90 − 35.72 mg, and 0.53 − 0.73 mg RAE, respectively. © 2022 The Author(s). Published with license by Taylor and Francis Group, LLC.

Increase of nutritional security in Sub-Saharan Africa through the production of dried products from underutilized crops

Currently, an estimated 20% of the population in Sub-Saharan Africa is food insecure with the incidence of hunger and malnutrition still rising. This trend is amplified by the socio-economic consequences of the COVID-19 pandemic. In contrast, more than a third of the harvestable perishable produce is lost due to a lack of preservation or failure to utilize preservation as is the case for underutilized crops (UCs). Moreover, some of the preservation techniques utilized are poor, leading to the deterioration of food quality, especially the micronutrients. In this study, we thus exemplarily investigated the impact of different drying settings on the quality of two highly nutritious UCs, namely cocoyam and orange-flesh sweet potato (OFSP) (40, 60, and 80 degrees C for cocoyam and 40, 50, 60, and 70 degrees C for OFSP) to deduce the optimum quality retention and further develop a theoretical design of processing units and processing guidelines for decentralized food processing. Drying cocoyam at 80 degrees C and OFSP at 60 degrees C, respectively resulted in a relatively shorter drying time (135 and 210 min), a lower total color difference (2.29 and 11.49-13.92), greater retentions for total phenolics (0.43 mg GAE/100 g(DM) and 155.0-186.5 mg GAE/100 g(DM)), total flavonoid (128 mg catechin/100 g(DM) and 79.5-81.7 mg catechin/100 g(DM)) and total antioxidant activity (80.85% RSA and 322.58-334.67 mg AAE/100 g(DM)), respectively for cocoyam and OFSP. The beta-carotene, ascorbic acid and vitamin A activity per 100 g(DM) of the OFSP flours ranged between 6.91- 9.53 mg, 25.90 - 35.72 mg, and 0.53 - 0.73 mg RAE, respectively.