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Specialised Sweetpotato Vine Multiplication in Lake Zone, Tanzania: What “Sticks” and What Changes?

In Lake Zone, Tanzania, farmers were trained to multiply and distribute quality sweetpotato planting material. The objectives of this study were to assess changes in skills and practices among the trained farmers as vine multiplication became a specialized task. Nine months after the project ended, all 88 decentralized vine multipliers …
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Drought effects on root and tuber production: A meta-analysis

Roots and tubers such as potatoes and cassava rank within the top six among the world’s most important food crops, yet the extent to which their global production has been adversely affected by drought remains unclear. Greater uncertainties exist on how drought effects co-vary with: (1) root and tuber species, …
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Development of End-User Preferred Sweetpotato Varieties

The objective of this study was to develop end-user preferred sweetpotato varieties using a diallel mating scheme and to estimate the level of heterosis and heterobeltiosis.  using a diallel mating scheme and to estimate the level of heterosis and heterobeltiosis among F1 hybrids obtained from a diallel between low sugar sweetpotato genotypes.   Sweetpotato …
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Genetic incompatibilities in sweetpotato and implications for breeding end-user preferred traits

The objective of this study was to assess compatibilities among sweetpotato genotypes to select good parents for breeding end-user preferred traits in varieties for increased utilization in Ghana and beyond.   Sweetpotatoes utilization is low in Ghana due to lack of farmer and consumer preferred cultivars. Poor flowering and incompatibilities among …
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Genetic control of dry matter, starch and sugar content in sweetpotato

Genetic control of dry matter, starch and sugar content

Sweetpotato is in the botanical family Convolvulaceae. It is the only crop plant of major economic importance for food among the approximately 50 genera and more than 1000 species of the family, which may be due to the Agrobacterium infection which occurred in evolutionary times of the crop. It is a nutritious food, low in fat and …
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Genetic Control of Beta-carotene, Iron and Zinc Content in Sweetpotato

        Micronutrients deficiency is a major contributor to poor health in developing countries. It can be alleviated by biofortification or enrichment of staple crops with micronutrients. Sweetpotato is a major staple crop in numerous tropical countries and is naturally biofortified. In spite of extensive promotion of orange-fleshed sweetpotato varieties (OFSPs), they are poorly utilized …
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Evaluation of sweetpotato accessions for end-user preferred traits improvement

This study assessed the genetic diversity and differentiation in sweetpotato accessions in Ghana to guide selection for genetic improvement on beta-carotene, dry matter and sugar contents to promote increased utilization. One hundred and fifteen sweetpotato accessions from four different sources, which were the International Potato Centre (CIP) collection, local collection from farmers’ field, …
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Constraints and Breeding Priorities for Increased Sweetpotato Utilization in Ghana

Sweetpotato is used in various food preparations in place of rice, cassava, yam and plantain in Ghana. In spite of this it does not have the same importance in Ghanaian diet as other root and tuber crops. Consumer taste, preference and acceptance are critical in determining the suitability of sweetpotato cultivars to …
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Breeding Superior Orange-Fleshed Sweetpotato Cultivars for West Africa

Vitamin A deficiency (VAD) is of public health significance in the developing world. In spite of extensive promotion of orange-fleshed sweetpotato (Ipomoea batatas) varieties (OFSPs), they are poorly utilized in Ghana because of their low dry matter and high sugar content. The objective of this study was to develop farmer- and consumer-preferred betacarotene-rich varieties to …
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