Sweetpotato in Sub-Saharan Africa

Low, Jan; Lynam, John K.; Lemaga, B.; Crissman, CC; Barker, Ian K.; Thiele, Graham; Namanda, S.; Wheatley, Christopher C.; Andrade, M.I.

doi:10.1007/978-1-4020-9475-0_16

Cited by 75 publications

(80 citation statements)

References 18 publications

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“…Vitamin A plays an important role in immune system functions and in the survival, growth and development of children, adolescent girls and women of reproductive age (Stathers et al, 2013(Stathers et al, , 2015. Vitamin A deficiency can be alleviated in several ways including dietary diversification, fortification, supplementation and bio-fortification (Low et al, 2009;WHO, 2009;Harvest Plus, 2012). Among these different ways, bio-fortification which is the genetic enhancement of the edible part of the plant with micronutrient content is the most cost effective and the safest.…”

Section: Introductionmentioning

confidence: 99%

The Inheritance of Yield Components and Beta Carotene Content in Sweet Potato

Mbusa¹,

Ngugi²,

Olubayo³

et al. 2018

JAS

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Analysis of the gene action exhibited by an agronomic trait in crop plants is useful in the planning of an effective plant breeding program. This study sought to establish the inheritance variance of root yield components and beta carotene content present in sweet potato clones commonly grown in Kenya. Ten contrasting parents were selected based on their beta carotene content, dry matter content and yield potential. They were planted in pots in the green house at KEPHIS-Muguga, Kenya, where they were grafted into Ipomoea setosa to boost their ability to flower. Five parents were further selected based on their ability to flower under local environmental conditions and crossed in a 5 × 5 half diallel manner. Five parents and ten F 1 clones arising from this hybridization were evaluated at KALRO-Kiboko, Kenya during two rainy seasons. The field trials were laid out in a randomized complete block design of three replications. The data were scored for root yield characteristics, beta carotene and root dry matter content. Griffing Method II, Model 1 diallel was used to estimate the general and specific combining ability. Genetic variability for beta carotene and root dry matter content indicated that the two traits were controlled mostly by both additive and dominant gene actions. Heterosis gene effects were found for beta carotene and root dry matter content which would be useful in the improvement of sweet potato productivity.

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Section: Introductionmentioning

confidence: 99%

The Inheritance of Yield Components and Beta Carotene Content in Sweet Potato

Mbusa¹,

Ngugi²,

Olubayo³

et al. 2018

JAS

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show abstract

“…In countries in Eastern and Central Africa with two rainy seasons, such as Burundi, Rwanda, and Uganda, sweetpotato is available throughout most of the year and is consumed as a primary staple food [ 12 ] . In most other sub-Saharan countries, sweetpotato is seasonal and is consumed as a secondary staple food.…”

Section: Consumption Forms Preparation and Processing Methodsmentioning

confidence: 99%

“…The intensity of the orange color generally re fl ects the amount of b -carotene in the sweetpotato [ 10,11 ] . A joint bioforti fi cation program between several African countries introduced several conventionally bred, b -carotene-rich, orangefl eshed varieties since the late 1990s [ 12 ] . Bioforti fi cation, as discussed in Chap.…”

Section: Potential Effect Of Orange Sweetpotato To Address Vitamin a mentioning

confidence: 99%

“…The energy content of sweetpotato is thus highly bene fi cial in these at-risk populations. Considerable proportions of the rural population obtain much of their energy needs from staple foods; growing sweetpotato is therefore an important strategy for poor rural households that have limited access to forti fi ed staple foods [ 12 ] . Also, the soft texture makes it suitable for infant feeding, as well as for the elderly and the ill.…”

Section: Contribution Of Sweetpotato To Dietary Vitamin a Requirementsmentioning

confidence: 99%

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Orange Sweetpotato as a Staple or Complementary Food

Jaarsveld

Faber

2012

Carotenoids and Human Health

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Conventionally bred orange sweetpotato varieties with high • b -carotene content accepted by consumers and small-scale rural African farmers are available. Ef fi cacy and effectiveness studies proved that orange sweetpotato offers a complementary source • of vitamin A to rural sweetpotato-producing communities to improve vitamin A intakes. A large variation in • b -carotene content in sweetpotato varieties occurs and the amount needed to provide the dietary requirement of vitamin A varies substantially. For example, for South African varieties, between 25 and 265 g boiled yellow to orange sweetpotato will provide 100 % of the vitamin A dietary requirement for all age groups. Because considerable amounts of • b -carotene are retained in boiled sweetpotato, the high b -carotene orange varieties can be eaten as a staple, vegetable, or in processed products. Orange sweetpotato processed products can make a signi fi cant contribution toward sustaining an • increased vitamin A intake provided that high b -carotene varieties are used, orange sweetpotato comprise a considerable proportion as an ingredient, and optimal processing methods are used. Fat, salt, and sugar should be used sparingly in processed products to not exacerbate the increasing • problem of chronic diseases. Vitamin A de fi ciency does not occur in isolation. Hence, the promotion of orange sweetpotato • needs to be part of a more holistic dietary approach to address vitamin A de fi ciency and improve overall diet quality.

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“…Thus, areas affected by frost often have limited planting material at the beginning of the production season. Consequently, farmers have to wait in order to accumulate sufficient planting material, which then results in delayed planting, lower yield and lower produce prices (ARC, 2013;Low et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Cost Effectiveness and Influence of Storage Bag Type on the Quality of Sweet Potato Vines

Hlerema¹,

Badza²,

Laurie³

et al. 2018

JAS

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Sweet potatoes present an opportunity for improving food security and income generation in South Africa. The yield of sweet potatoes is highly dependent on the quality of sweet vines used in production. This study aimed at identifying the most cost effective and best storage bag type, between polyethylene and hessian bags, to prolong vine storage. Three bag treatments namely polyethylene bag without holes, polyethylene bag with 12 holes and dry hessian with vines from sweet potato cultivar "Bophelo" were stored for 3, 6, 9, 12 and 15 days at ambient temperature during summer. The costs effectiveness of using different types of bags when transporting and storing vines was calculated using the incremental cost-effectiveness ratio (ICER). The results of the study showed that hessian bags offer the best option to prolong storage (12 days) as compared to polyethylene bags (6 days), however hessian bags are more expensive (R49.10/1 day quality) ($4.08 as at 24/01/2018). Polyethylene bags can be used if the farmer is not willing to pay the additional cost for an addition day of quality. Holes need to be made in polyethylene bags in order to allow air circulation.

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Sweetpotato in Sub-Saharan Africa

Cited by 75 publications

References 18 publications

The Inheritance of Yield Components and Beta Carotene Content in Sweet Potato

The Inheritance of Yield Components and Beta Carotene Content in Sweet Potato

Orange Sweetpotato as a Staple or Complementary Food

Cost Effectiveness and Influence of Storage Bag Type on the Quality of Sweet Potato Vines

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