A5090319854- Cassava research and cyanide
- Plant Virus Research Studies
- Banana Cultivation and Research
- Agricultural pest management studies
- Genetic and Environmental Crop Studies
- Agronomic Practices and Intercropping Systems
- Cocoa and Sweet Potato Agronomy
- Nematode management and characterization studies
- Agricultural Innovations and Practices
- Genetics and Plant Breeding
- Organic Food and Agriculture
- Legume Nitrogen Fixing Symbiosis
- Food composition and properties
- Plant Pathogenic Bacteria Studies
- Phytase and its Applications
- Agricultural Economics and Practices
- Proteins in Food Systems
- Insect-Plant Interactions and Control
- Advances in Cucurbitaceae Research
- GABA and Rice Research
- Innovations in Aquaponics and Hydroponics Systems
- Education Systems and Policy
- Diverse academic and cultural studies
- Agricultural Economics and Policy
- Animal and Plant Science Education
International Institute of Tropical Agriculture
2016-2021
International Potato Center
2005-2021
International Potato Center
2009-2016
Rwanda Agriculture Board
2016
Makerere University
2011-2016
University of Greenwich
2013
International Potato Center
2013
Australian Centre for International Agricultural Research
2013
Centre for Rights Education and Awareness
2013
Forum Solidaridad Perú
2013
The present study evaluated selected East African (EA) sweetpotato varieties for storage root dry matter and nutrient content obtained information on the potential contributions of to alleviate vitamin A mineral deficiencies. Roots from 89 farmer (white- orange-fleshed) one introduced variety (‘Resisto’) were analyzed quality using near-infrared reflectance spectroscopy technology. Location differences only significant starch content. variance was ( P < 0.01) all traits except sucrose...
The sweetpotato [Ipomoea batatas (L.) Lam.] cultivar NASPOT 11 (Namulonge Sweetpotato 11) was approved for release by the Ugandan Plant Variety Release Committee in Apr. 2010 (Mwanga et al., 2010). This is fifth time breeding program Uganda has officially released cultivars. 19 cultivars between 1995 and 1999 2009), but to best of our knowledge, ‘NASPOT 11’ represents first bred from segregating populations participatory plant (PPB) Africa perhaps world (Gibson 2008; Mwanga acceptable...
Cassava brown streak disease (CBSD), caused by cassava ipomoviruses (CBSIs), has become the most debilitating biotic stress to production in East and Central Africa. Lack of CBSD-resistant varieties necessitated search for alternative control measures. Most smallholder farmers reuse stems from previous crops planting new season. Recycling material this way can lead “degeneration” owing compounding effects disease. In study, degeneration was defined as increase CBSD incidence reduction...
Here, we report a method to clean cassava plants from viral infections that cause mosaic and brown streak diseases in Africa. Infected of resistant or tolerant varieties Malawi, Mozambique, Kenya, Tanzania Uganda were cleaned the UK using combination tissue culture, chemotherapy thermotherapy. In first cycle our virus-indexing procedure, successfully 27 31 (87%), after an additional three cleaning cycles, all virus-free. Virus-free tissue-cultured shipped back Africa for distribution...
Sweetpotato [ Ipomoea batatas (L.) Lam] breeding is important for food security and health in East Africa (EA), a platform Uganda provides national researchers breeders EA with true seed. Our objectives were to characterize genetic relationships among parental material used at the platform. There 135 parents six check clones analyzed using 31 simple sequence repeat primers. An average of 7.13 alleles per primer was found, Jaccard similarity coefficients range 0.298 1.00 mean 0.542....
Cassava brown steak disease (CBSD), caused by streak virus (CBSV) and Ugandan cassava (UCBSV), is the most important biotic constraint to production in East Central Africa. Concerted efforts are required prevent further spread into West Africa as well reduce losses areas already affected. The study reported here was part of a five-country (Kenya, Malawi, Mozambique, Tanzania Uganda) programme that aimed identify superior cultivars resistant CBSD disseminate them widely region. Seventeen...
Sweetpotato (Ipomea batatas) is one of the most important staple crops in densely populated parts eastern Africa and quickly becoming an supplementary southern part continent. vital to small-scale farmers with limited land, labour capital. One its greatest values ability be harvested piecemeal for home consumption or income generation. Presently, predominant sweetpotato cultivars are white-fleshed varieties that contain negligible amounts beta-carotene, a micronutrient body uses produce...
Two orange-fleshed landrace sweetpotato [Ipomoea batatas L. (Lam.)] cultivars named ‘SPK004’ (‘Kakamega’) and ‘Ejumula’ were approved for release by the Ugandan Plant Variety Release Committee in Apr. 2004 (Mwanga et al., 2004a). This is third lot of to be officially released program Uganda, first two being 1995 1999 2003). are Kenyan germplasm, respectively, selected from a batch 25 (OFSP) clones different origins (Table 1). Both have good storage root shapes if grown light soils, high dry...
ABSTRACT Sweetpotato [ Ipomoea batatas (L.) Lam] farmer varieties are still the backbone of production and breeding programs in Sub‐Sahara Africa. Usually, Africa white‐ or cream‐fleshed sweetpotato (WFSP), but recently orange‐fleshed (OFSP) were found East The objective study was to characterize WFSP OFSP germplasm from Eighty‐five African (29 OFSPs 56 WFSPs) seven non‐African origin as check clones analyzed for diversity using 26 simple sequence repeat (SSR) markers. A total 158 alleles...
Cassava varieties resistant to cassava mosaic disease (CMD) and brown streak (CBSD) are needed for the food income security of rural poor in eastern southern Africa (ESA). The International Institute Tropical Agriculture led five national breeding programs (Malawi, Mozambique, Kenya, Tanzania Uganda) virus-cleaning exchanging elite germplasm both diseases. This paper documents experiences lessons learned from process. Thirty-one clones (25 elite, two standard four national) were submitted by...
In Burundi most small-scale farmers still grow traditional cassava landraces that are adapted to local conditions and have been selected for consumer preferred attributes. They tend be susceptible, in varying degrees, devastating viral diseases such as Cassava Brown Streak Disease (CBSD) Mosaic (CMD) with annual production losses of US$1 billion. For long term resistance the disease, several breeding strategies proposed. A sound basis a program is understand genetic diversity both elite...
The National Sweetpotato Programme of the Agricultural Research Organisation (NARO) in Uganda released 14 sweetpotato cultivars between 1994 and 2005. Of cultivars, six have gained importance local Ugandan markets export trade to Europe two are being used as parental sources for high drymatter (>30%), virus disease (SPVD) nematode resistance hybridization schemes, genetic mapping work joint international collaborative research. Two orange-fleshed (OFSP) namely, Ejumula, SPK004 (Kakamega),...
A study was conducted in sweet potato farmers’ fields Tanzania and Uganda to determine the status of virus disease (SPVD) incidence its vectors. SPVD high (66 100%) but low (10 - 40%) Uganda. SPVD symptom expression severity were highly variable both within between countries. Whitefly (Bemisia tabaci) not aphids observed all their abundance varied remarkably locations. In Tanzania, sweetpotato chlorotic stunt (SPCSV) serologically detected 50% samples feathery mottle (SPFMV) 45% often dual...
African dry and starchy (DS) orange‐fleshed sweetpotato [ Ipomoea batatas (L.) Lam] (OFSP) cultivars, distinct from American moist or medium sweet OFSP, have potential to fight vitamin A deficiency (VAD) in the world. This study assessed genotype × environment ( G E ) interactions multienvironment trials (METs), genetic correlations for total root yield (TYLD), biomass (BIOM), harvest index (HI), matter (RDM), starch (RST), sucrose (RSU), β ‐carotene, (RBC), Fe (RFE), Zn (RZN), Ca (RCA), Mg...
The overdependency on local cassava varieties and informal seed sources by farmers in Rwanda has contributed to the spread of viral diseases. use improved planting materials made available through formal sources, that assure quality, is one way prevent future disease outbreaks. In order increase availability of, access to, such there increasing interest develop business models. This study aims understand sourcing practices different farm typologies inform development tailored A total 390...
Yam bean (Pachyrhizus spp.) is legume crop that not only produces edible roots but also has a high yield of unutilized seeds. Although the yam seeds are rich in protein, they used due to content toxic rotenone. In this study, were detoxified and nutritional functional properties their protein determined assess proteins' potential for applications. Seeds 10 accessions (2 P. erosus, 4 ahipa tuberosus) analyzed proximate composition, pasting (bulk density, least gelation concentration, water...
Cassava ( Manihot esculenta Crantz.) has been a vital staple and food security crop in Tanzania for several centuries, it is likely that its resilience will play key role mitigating livelihood insecurities arising from climate change. The sector dominated by smallholder farmers growing traditional landrace varieties. A recent surge virus diseases awareness the commercial potential of cassava prompted drive to disseminate improved varieties country. These factors however also threaten...
The amount of genotypic and phenotypic variability that exists in a species is important for selection initiating breeding programs. Yam bean grown locally tropical countries the Americas Asia their tasty storage roots, which usually have low dry matter content. crop was recently introduced Uganda other East Central African to supplement iron (Fe) protein content diets. This study aimed estimate genetic root yield quality traits among 26 yam accessions Uganda. A randomized complete block...