Sweetpotato Repository

Nine consultations were held from April 2015 to May 2019, with participation from diverse actors in the seed system i.e. researchers from CIP and NARIs, NGOs implementing sweetpotato projects, regulators, seed producers and farmers. Participants say th …

Strengthened the capacity of national partners (National Root Crops Research Institute (NRCRI) and Bayero University(BUK)) to produce and manage high quality planting material of breeder, pre-basic and basic seeds: 21 net tunnels, three screen houses, …

In the Lake Zone, Tanzania, between 2009-2012, 88 decentralized vine multipliers (DVMs) were established by the Marando Bora project. Five years later, the follow up study traced 81 of the DVMs. 40% of the DVMs had sold planting material of Marando Bor …

CIP conducted a financial feasibility study for a private seed company engaged in early generation seed (EGS) production for root, tuber and banana crops. The study showed that the business is financially viable in the long-run based on the existing bu …

A user-friendly tool to estimate the requirements for Early Generation Sweetpotato Seed (EGS) is now available for use by public sector seed producers. The method was first used in Uganda to estimate the seed requirement by root producers for quality s …

A study was conducted to understand the economic sustainability of basic seed enterprises to bridge the gap between pre-basic seed producers and decentralized vine multipliers. Four commercial seed multipliers were supported on a 2:3 (multiplier: CIP) …

Two methods of protected vine conservation beds (insect protected net tunnel (Fig. 1) and miniscreenhouse (Fig. 2)) were compared with an open field control to assess cost effectiveness for quality seed production and subsequent root production. Mean p …

Affordable insect-proof net tunnels proved effective in reducing virus-related degeneration in sweetpotato in Tanzania. Re-infection in high virus pressure area was prevented for up to 20 months and 18 months for Polista and Kabode varieties, respectiv …

A nutrient media for multiplying pre-basic sweetpotato vines under a sandponics system was optimized. The vine multiplication rate for pre-basic seed multiplication increased by 22% using sandponics. The cost of producing a 3-node cutting has been redu …

The Sweetpotato Digital Catalogue (Fig. 1) presents a collection of the best performing sweetpotato varieties or “best bets” in Africa. Standardized information of 80 varieties in use in15 Sub-Saharan Africa (SSA) countries can be found at www.sweetpot …

Research conducted on diverse sweetpotato germplasm showed that some genotypes form their roots at the same time, that are of the same maturity (discontinuous storage root formation and bulking) and other continue to form roots over time (continuous ro …

A trained sensory panel was developed to assist with breeding for sweetpotato quality preferences of consumers in West Africa. Lexicons of terms to precisely describe boiled and fried sweetpotato sensory quality have been developed using trained sensor …

Successful second round of accelerated breeding completed, with the release of 4 orange-fleshed (OFSP) and 3 purple-fleshed (PFSP) drought tolerant sweetpotato varieties in 2016. Third round will be completed in 2019. Early season and terminal drought …

Determine the response to selection for yield and quality in three applied breeding populations for a complete reciprocal recurrent selection cycle for (i) OFSP wide adaptation and earliness, (ii) OFSP for high iron, and (iii) OFSP for low sweetness af …