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Sweet potato-based complementary food for infants in low-income countries

Background: In low-income countries, most infants are given cereal-based complementary foods prepared at the household level. Such foods are high in phytate, which limits the bioavailability of nutrients, including iron, calcium, zinc, and in some cases proteins, which are crucial to the development of infants. Objective: To compare the levels …

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The Introduction of Orange-fleshed Sweetpotato on the Agricultural Farming System of Central Mozambique: The Opportunity Cost of Growing This Nutritious Crop

Many efforts have been recently made in Mozambique to disseminate orange-fleshed sweetpotato (OFSP), an efficacious and effective source of pro-vitamin A. It has been demonstrated that the consumption of OFSP during the harvesting period can reduce vitamin A deficiency (VAD) by 15% when it is introduced alongside an effort to …

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Adaptability and stability of sweetpotato varieties for low-input systems in Uganda

Sixteen of sweet potato varieties were evaluated for fresh storage roots yield in 20 trials during 2000-2001 for three seasons in four locations in Uganda.Of the 16 varieties, 11 were developed by farmers and five by central breeding programme. The behaviour of the varieties was quantified in terms of wide …

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ADAPTATION AND STABILITY ANALYSIS OF SWEETPOTATO VARIETIES FOR LOW-INPUT SYSTEMS IN UGANDA

Sixteen sweet potato varieties were evaluated for fresh storage root yield in 20 trials during 2000-2001 for three seasons in four locations in Uganda. Of the 16 varieties, 11 were developed by farmers and five by a central breeding programme. The behaviour of the varieties was quantified in terms of …

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Pest Status of Acraea acerata Hew. and Cylas spp. in Sweetpotato (Ipomoea batatas (L.) Lam.) and Incidence of Natural Enemies in the Lake Albert Crescent Agro-ecological Zone of Uganda

This study presents the results of farmers’ field surveys of the sweetpotato butterfly, Acraea acerata Hew., and the two African sweetpotato weevils, Cylas puncticollis Boheman and C. brunneus F. infestation and damage. The objectives of this study were to determine (i) occurrence and distribution of A. acerata and Cylas spp. as well as infestation …

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Segregation analysis of cry7Aa1 gene in F1 progenies of transgenic and non-transgenic sweetpotato crosses

Sweetpotato weevils are the most devastating pests of sweetpotato causing yield losses ranging from 60 to 100%. Their cryptic nature, where the larvae is found within plant tissues render them difficult to manage especially using chemicals control. Development of weevil resistant sweetpotato was conducted by crossing a transgenic event CIP410008.7 …

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Thidiazuron improves adventitious bud and shoot regeneration in recalcitrant sweetpotato

Induction of adventitious buds and shoots from intact leaves and stem internode segments of two recalcitrant Ugandan sweetpotato (Ipomoea batatas L.) cultivars was investigated in vitro on Murashige and Skoog (MS) medium, supplemented with 3 different levels (0.5, 2.0 and 4.0 μM) of Thidiazuron (TDZ). Shoots wereregenerated in all TDZ concentrations in …

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Identification of relevant non-target organisms exposed to sweetpotato weevil-resistant Bt sweetpotato in Uganda

Assessment of the impact of transgenic crops on non-target organisms (NTO) is a prerequisite to their release into the target environment for commercial use. Transgenic sweetpotato varieties expressing Cry proteins (Bt sweetpotato) are under development to provide effective protection against sweetpotato weevils (Coleoptera) which cause severe economic losses in sub-Saharan …

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Evaluation of bioassays for testing Bt sweetpotato events against sweetpotato weevils

Sweetpotato weevil (Cylas puncticollis) Boheman is a serious pest throughout Sub-Saharan Africa region and is a big threat to sweetpotato cultivation. Ten transgenic sweetpotato events expressing Cry7Aa1, Cry3Ca1, and ET33-34 proteins from Bacillus thuringiensis (Bt) were evaluated for resistance against C. puncticollis. Four bioassays used were: (i) 1st instar larva in an artificial …

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