Sweet Potato

Genetic analysis of resistance to Alternaria leaf petiole and stem blight of sweetpotato in Uganda

Alternaria blight (Alternaria spp.) is an important sweetpotato disease in Uganda causing yield losses of over 50 % in susceptible genotypes. In Uganda, Alternaria bataticola and Alternaria alternata are the major species with A. bataticola the more aggressive of the two. The most effective control measure for this disease is the use of resistant genotypes. This study was conducted to determine the inheritance of resistance to Alternaria blight and the general and specific combining abilities of the available germplasm.

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Cost Structure of Yam Farmers in Ghana: The Case of the Forest Savannah Transition Agro-ecological zone.

This paper investigates the cost functions and the determinants of cost inefficiencies among yam farmers in Ghana using the stochastic frontier cost approach. The stochastic frontier cost approach estimates the general and inefficiency models simultaneously. Farm-level data and socio-economic variables on a sample of 374 yam farmers collected in 2009 in the Ashanti and Brong Ahafo Regions is used in the study.

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Assessing transferability of sweetpotato EST SSR primers to cocoyam and micropropagation of nine elite cocoyam varieties in Ghana

Cocoyam, an important staple crop in Ghana, provides edible leafy vegetable and starchy cormels. Due to difficulty in getting primers for cocoyam, sweetpotato EST SSR primers were used to amplify cocoyam lines. Genomic DNA was isolated from 10 sweetpotato and nine cocoyam cultivars. Ten sweetpotato accessions were screened alongside three cocoyam cultivars, using 22 EST Sweetpotato SSR primers, 13 of which could amplify cocoyam sequences and were subsequently used to screen nine cocoyam cultivars. Thirteen random primers were also used for diversity study.

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Analysis of the genetic diversity of selected East African sweet potato (Ipomea batatas [L.] Lam.) accessions using microsatellite markers

Sweet potato (Ipomea batatas [L.] Lam.) is an economically important crop in East Africa chiefly grown by small holder farmers. Sharing of vines for planting is a very common occurrence among these farmers and eventually varieties are given local names, making it hard to trace the original pedigree. It is therefore important to characterise the sweet potato germplasm for purposes of breeding and germplasm conservation. In this study, 68 sweet potato accessions were evaluated for diversity using 12 microsatellite markers.

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A survey of traditional processing of sweet potato flour for amala, consumption pattern of sweet potato amala and awareness of orange-fleshed sweet potato (OFSP)

Sweet potato is a food crop that is increasingly being recognized as having an important role to play in improving household and national food security, health and livelihoods of poor families in sub-Saharan Africa. A baseline survey was conducted in six states in Southwest Nigeria on traditional processing methods of sweet potato flour for amala (a stiff paste meal), consumption status of sweet potato amala and level of awareness of orange-fleshed sweet potato variety.

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Getting a piece of the pie: An analysis of factors influencing women's production of sweetpotato in Northern Nigeria

This paper examines the conditions and factors that create opportunities for women to engage in market-oriented crop production. It uses as a case study of Nasarawa and Kwara states in northern Nigeria, where women have started to cultivate sweetpotato, a crop traditionally grown by men.

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A large-scale intervention to introduce orange sweet potato in rural Mozambique increases vitamin A intakes among children and women

ë_-Carotene-rich orange sweet potato (OSP) has been shown to improve vitamin A status of infants and young children in controlled efficacy trials and in a small-scale effectiveness study with intensive exposure to project inputs. However, the potential of this important food crop to reduce the risk of vitamin A deficiency in deficient populations will depend on the ability to distribute OSP vines and promote its household production and consumption on a large scale.

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Gender and relative economic efficiency in sweet potato farms of Imo State, Nigeria: a stochastic cost frontier approach

This study employed the stochastic frontier cost function to measure the level of economic efficiency and its determinants in small-scale sweet potato production in Imo State, Nigeria on gender basis. A multi-stage random sampling technique was used to select 120 sweet potato farmers (64 females and 56 males) in the State in the year 2008. The parameters of the stochastic frontier cost function were estimated using the maximum likelihood method.

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Farmers' personal characteristics in assuring agricultural productivity: Lessons from sweet potato farmers in Teso, Uganda

Farmers constantly require incentives to stay in production. This paper discusses findings on farmers' personal characteristics salient in production among sweet potato farmers from the study done in Teso, Uganda. Both fanners and agricultural advisers consulted agreed that the weather is a big factor in agricultural production. Over 91% of the farmers expressed positive attitudes towards growing sweet potatoes which spelt their interest in farming. Conditions under which farmers worked affected enterprise productivity.

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Determinants of smallholder sweet potato farmers' participation in different market options: the case of Vihiga County, Kenya

Market participation has a potential to increase farmers' rural incomes and employment opportunities especially if farmers concentrate on production and marketing of local crops requiring low inputs such as sweet potatoes. The purpose of this research was to investigate the factors that determine farmers' shift in market participation from village to regional market in Vihiga County. Cross-sectional data was collected and a multinomial logit model was used for the analysis.

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