Biofortified Crops with a Visible Trait: The Example of Orange-Fleshed Sweet Potato in Sub-Saharan Africa

2013 ◽  
pp. 371-384 ◽  
Author(s):  
Jan W. Low
Keyword(s):  
Sweet Potato ◽  
Sub Saharan Africa ◽  
Sub Saharan ◽  
Orange Fleshed Sweet Potato

The Potential of Orange-Fleshed Sweet Potato to Prevent Vitamin A Deficiency in Africa

2014 ◽  
Vol 84 (1-2) ◽  
pp. 65-78 ◽  
Author(s):  
Fekadu Gurmu ◽  
Shimelis Hussein ◽  
Mark Laing
Keyword(s):  
Vitamin A ◽  
Sweet Potato ◽  
Ipomoea Batatas ◽  
Vitamin A Deficiency ◽  
Sub Saharan Africa ◽  
African Countries ◽  
Vitamin A Status ◽  
Sub Saharan ◽  
Prevention Methods ◽  
Orange Fleshed Sweet Potato

Purpose: Vitamin A deficiency is among major health problems worldwide that leads to blindness, retarded growth and death, particularly in developing countries. In these countries, vitamin A deficiency largely affects pre-school children, pregnant and lactating mothers, and the rural poor. For instance, the predicted prevalence of vitamin A deficiency for 36 sub-Saharan African countries is 19.1 %. Methods: Different strategies, including vitamin A supplementation, food fortification and dietary diversification, have been used to combat this problem. However, these strategies are not sustainable due to their high costs. Results: Orange-fleshed sweet potato (Ipomoea batatas L. Lam) is a low priced crop, which is part of staple foods in most of sub-Saharan Africa that can be a year-round source of vitamin A. Most of the orange-fleshed sweet potato varieties contain 3000 - 16000 μg 100 g-1 of β-carotene and this contributes to 250 to 1300 μg 100 g-1 Retinol Activity Equivalents (RAE). Therefore, by using orange-fleshed sweet potato, it is possible to improve vitamin A status, increase the bio-availability of different micro-nutrients such as Fe, Zn, Ca and Mg, reduce vitamin A deficiency and hence reduce child mortality rates by 23 to 30 %. Conclusion: The article highlights the significance of vitamin A for human nutrition, the effect of vitamin A deficiency, the different prevention methods and the potential of orange- fleshed sweet potato as a food crop to prevent vitamin A deficiency.

ANALYSIS OF PROFITABILITY OF ORANGE FLESH SWEET POTATO (Ipomea batata) IN OSUN STATE, NIGERIA

2019 ◽  
Vol 18 (1) ◽  
pp. 140-150
Author(s):  
A. M. OMOARE
Keyword(s):  
Linear Regression ◽  
Sweet Potato ◽  
Negative Relationship ◽  
Potato Production ◽  
Study Data ◽  
Sub Saharan Africa ◽  
Service Support ◽  
Major Producer ◽  
Use Efficiency ◽  
Sub Saharan

Nigeria is a major producer of sweet potato in Sub-Saharan Africa (SSA). This study looked at resource use efficiency and profitability of Orange Flesh Sweet Potato (OFSP) in Osun State, Nigeria. Two out of the three zones in Osun State were randomly selected from which six blocks were selected; and thirty cells were randomly selected from the six blocks. Two Hundred and Fifty (250) respondents were randomly selected across the thirty cells for the study. Data were analyzed using linear regression and Pearson Product Moment Correlation (PPMC). Results of the study showed that respondents are agile and active in orange flesh sweet potato production, with mean age of 38.8 years and had wealth of experience (12.6 years). Most (82.4%) of the respondents cultivated orange flesh sweet potato on ridges, 78.8% used hired labour and 92.4% used personal savings for orange flesh sweet potato farming. The average yield of orange flesh sweet potato was 6.20 tonnes/ha, the Total Revenue (TR) was ₦127,999.93/ha while the profit was ₦46,841.93/ha. Major limitations to orange flesh sweet potato production are inadequate finance (83.2%), poor extension service support (80.45), and inadequate market information (74%). Results of linear regression showed that land (t = 3.146, p = 0.001), labour (t = -3.105, p = 0.003), agrochemicals (t = 8.499, p = 0.000), and seeds (t = 3.928, p = 0.004) were determinants of orange flesh sweet potato production (p < 0.05). In addition, correlation revealed negative relationship between constraints faced by the respondents and profit realized from orange flesh sweet potato production (r = -0.72, p = 0.01). The study concluded that orange flesh sweet potato production was profitable. It was recommended that soft credits should be extended to sweet potato farmers by the banks in the study area.    

scholarly journals Influence of processing methods on the quality attributes of bio-fortified sweet potato products

Agrosearch ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 133-143
Author(s):  
P.O. Pessu ◽  
S.A. Akande ◽  
G.I. Abel ◽  
E.K. Gbabe ◽  
I.G. Adarabierin ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Vitamin A Deficiency ◽  
Sub Saharan Africa ◽  
Heat Processing ◽  
Treatment Quality ◽  
Processing Methods ◽  
Overall Acceptability ◽  
Mineral Compositions ◽  
Sub Saharan ◽  
Quality Of Products

Bio-fortified sweet potato (BSP) is one of the crops that can be used to address the problems of vitamin A deficiency in the Sub-Saharan Africa but it’s currently being underutilized. This study seeks to evaluate the effects of different heat processing methods on the quality of products made from BSP in order to increase its utilization. Freshly harvested tubers were purchased from a Research Farm in Federal University of Agriculture, Abeokuta (FUNAAB), Nigeria and brought to the Processing Centre, Nigerian Stored Products Research Institute (NSPRI), Ilorin. The sample was taken through some standard pre-processing operations of sorting, peeling, washing, slicing (2.11 mm), and deep frying (3 minutes) while some portions were boiled immediately after sorting with or without skin for 10–15 minutes. Each treated sample was analysed for sensory, proximate, vitamins and mineral compositions following standard methods. Results showed that fried sample had highest acceptability for aroma (7.25) and crispiness (7.00) while sample boiled without skin (15 min) was rated with least scores in colour (5.30), appearance (5.40), texture (4.95), crispiness (4.65) and overall acceptability (5.70). Protein, vitamin C, phenolics, flavonoids and reducing sugar contents were 6.53–18.52%, 10.89–76.69 mg/100 g, 0.57–3.15 mg/L, 94.64–383.91 mg/L and 43.05–237.12 g/100 g respectively while some minerals such as Na, K and Zn ranged from 8.42–17.45, 5.12–9.30 and 0.03–0.09 mg/L respectively. Different heat processing at different durations affected the sensory attributes, nutritional and mineral compositions of BSP. Key words: Post-harvest, food security, potato, heat treatment, quality

Ensuring the Supply of and Creating Demand for a Biofortified Crop with a Visible Trait: Lessons Learned from the Introduction of Orange-Fleshed Sweet Potato in Drought-Prone Areas of Mozambique

2007 ◽  
Vol 28 (2_suppl2) ◽  
pp. S258-S270 ◽  
Author(s):  
Jan W. Low ◽  
Mary Arimond ◽  
Nadia Osman ◽  
Benedito Cunguara ◽  
Filipe Zano ◽  
...  
Keyword(s):  
Young Children ◽  
Vitamin A ◽  
Sweet Potato ◽  
Dietary Diversity ◽  
Positive Impact ◽  
Integrated Approach ◽  
Lessons Learned ◽  
Sub Saharan Africa ◽  
Orange Fleshed Sweet Potato ◽  
Biofortified Crop

Background Orange-fleshed sweet potato (OFSP) is a promising biofortified crop for sub-Saharan Africa because it has high levels of provitamin A carotenoids, the formed vitamin A is bioavailable, and white-fleshed sweet potato is already widely grown. Objectives To examine whether farmers will adopt varieties with a distinct visible trait, young children will eat OFSP in sufficient quantities to improve vitamin A intake, OFSP can serve as an entry point for promoting a more diversified diet, and lessons can be drawn to assure sustained adoption. Methods The 2-year quasi-experimental intervention study followed households and children ( n = 741; mean age, 13 months at baseline) through two agricultural cycles in drought prone-areas of Mozambique. Results OFSP is acceptable to farmers when introduced by using an integrated approach. In the second year, intervention children ( n = 498) were more likely than control children ( n = 243) to have consumed OFSP (54% vs. 4%), dark-green leaves (60% vs. 46%), or ripe papaya (65% vs. 42%) on 3 or more days in the previous week ( p < .001 for all comparisons). Their vitamin A intakes were nearly eight times higher than those of control children (median, 426 vs. 56 μg RAE [retinol activity equivalents], p < .001). Diet diversification was limited by difficult agroecological conditions and low purchasing power. However, dietary diversity was higher among intervention than control children (32% vs. 9% consuming food from more than four groups; p < .001). Conclusions An integrated OFSP-based approach had a positive impact on the vitamin A intake of young children. A market development component and improved vine multiplication systems are recommended to assure sustained adoption.

scholarly journals Genetic Diversity of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) Colonizing Sweet Potato and Cassava in South Sudan

Insects ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 58 ◽  
Author(s):  
Beatrice C. Misaka ◽  
Everlyne N. Wosula ◽  
Philip W. Marchelo-d’Ragga ◽  
Trine Hvoslef-Eide ◽  
James P. Legg
Keyword(s):  
Genetic Diversity ◽  
Sweet Potato ◽  
Bemisia Tabaci ◽  
South Sudan ◽  
Sub Saharan Africa ◽  
Effective Management ◽  
Field Surveys ◽  
Genetic Groups ◽  
Sub Saharan ◽  
Group 1

Bemisia tabaci (Gennadius) is a polyphagous, highly destructive pest that is capable of vectoring viruses in most agricultural crops. Currently, information regarding the distribution and genetic diversity of B. tabaci in South Sudan is not available. The objectives of this study were to investigate the genetic variability of B. tabaci infesting sweet potato and cassava in South Sudan. Field surveys were conducted between August 2017 and July and August 2018 in 10 locations in Juba County, Central Equatoria State, South Sudan. The sequences of mitochondrial DNA cytochrome oxidase I (mtCOI) were used to determine the phylogenetic relationships between sampled B. tabaci. Six distinct genetic groups of B. tabaci were identified, including three non-cassava haplotypes (Mediterranean (MED), Indian Ocean (IO), and Uganda) and three cassava haplotypes (Sub-Saharan Africa 1 sub-group 1 (SSA1-SG1), SSA1-SG3, and SSA2). MED predominated on sweet potato and SSA2 on cassava in all of the sampled locations. The Uganda haplotype was also widespread, occurring in five of the sampled locations. This study provides important information on the diversity of B. tabaci species in South Sudan. A comprehensive assessment of the genetic diversity, geographical distribution, population dynamics, and host range of B. tabaci species in South Sudan is vital for its effective management.

scholarly journals Orange fleshed sweet potato a nutrition sensitive functional food for possible dietary approach to vitamin A deficiency and undernutrition

2021 ◽  
Vol 12 (3) ◽  
pp. 645-651
Author(s):  
Jyotsna Khanam ◽  
Sheikh Faisal Asadullah Mahdi ◽  
Monera Ahsan ◽  
Sheikh Nazrul Islam
Keyword(s):  
Vitamin A ◽  
Vitamin A Deficiency ◽  
Sub Saharan Africa ◽  
Sweet Potatoes ◽  
Carotene Content ◽  
Sensitive Function ◽  
Sub Saharan ◽  
Nutrition Sensitive ◽  
Orange Fleshed Sweet Potato ◽  
Orange Fleshed Sweet Potatoes

Orange Fleshed Sweet Potatoes (OFSPs) is an excellent nutrition sensitive function food. It contains dense amount of carotene and is also rich in proximate nutrients. A wide number of cultivars of OFSPs has been developed worldwide, particularly in sub-Saharan Africa and Asia. In Bangladesh, sixteen cultivars have been developed. Carotene content in the OFSPs surpasses all of the plant food carotene. OFSPs also contains good content of energy yielding nutrients. The Orange Fleshed Sweet Potatoes could, therefore, be a potential dietary approach to address the vitamin A deficiency for undernourished indigent people.

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