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Tag Archives: Ipomoea batatas

‘NASPOT 12 O’ and ‘NASPOT 13 O’ Sweetpotato

Two sweetpotato [Ipomoea batatas L. (Lam.)] cultivars, NASPOT 12 O (Namulonge sweetpotato 12 orange-fleshed) and NASPOT 13 O (Namulonge sweetpotato 13 orange-fleshed) were approved for release by the Ugandan Plant Variety Release Committee (UPVRC) in Nov. 2013 (Ssemakula et al., 2013). This brings to 22, the number of sweetpotato cultivars …
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Effect of maize intercrop plant densities on yield and β-carotene contents of orange-fleshed sweetpotatoes

Despite efforts to demonstrate the value of orange-fleshed sweetpotato (OFSP) (Ipomoea batatas L.) and quality protein maize (Zea mays L.) in combating vitamin A and protein malnutrition, small land holdings by rural poor farmers still limit the crops’ overall production in Africa. As such, intercropping and optimum plant density in …
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Variation in micronutrient content of orange-fleshed sweetpotato varieties grown in different environments

Field experiments were conducted at three locations in Zambia to characterize 15 sweetpotato varieties for tuber yield and micro-nutrient content. Location and variety had significant effect on tuber yield. Marketable yield ranged from 5.22 – 9.69 t/ha with variety Kakamega recording the least yield. AMMI analysis also indicated significant effects …
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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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Exploiting the use of biotechnology in sweetpotato for improved nutrition and food security: Progress and future outlook

Sweetpotato (Ipomoea batatas) production is expanding faster than any other major food crop in sub-Saharan Africa (SSA), with about 13.4 million tons of roots from 3.2 million hectares in 2005. However, major constraints, including sweetpotato weevils (SPWs) and sweetpotato virus disease (SPVD) cause almost total crop loss on susceptible cultivars. …
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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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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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