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• Part I: Advances in Sweetpotato and Potato Breeding 1: Advances in Sweetpotato Breeding from 1992 to 2012 2: Breeding Sweetpotato for Yield and Beta-carotene Content in Burkina Faso 3: Development of Dual-purpose Sweetpotato Varieties Through Participatory Breeding in Rwanda 4: Development and Evaluation of New Sweetpotato Varieties through Farmer Participatory Breeding for High Altitudes in Kenya 5: In Vitro Evaluation of Orange-fleshed Sweetpotato Genotypes for Drought Tolerance Using Polyethylene Glycol 6: Ex Ante Evaluation of Improved Potato Varieties for Sub-Saharan Africa 7: Durable Cisgenic Resistance to Phytophthora infestans in Potato and Perspectives for Applications in Africa 8: Exhibition Trial and Farmer Participatory Selection of New Late-blight Resistant B3C1 Potato Genotypes for Adaptation to Nigerian Conditions 9: Integrative Breeding Strategy for Making Climate-smart Potato Varieties for Sub-Saharan Africa 10: New Elite Potato Clones with Heat Tolerance, Late Blight and Virus Resistance to Address Climate Change Part II: Getting Potato Seed Systems Moving 11: Strategies to Improve Poor Seed Potato Quality and Supply in Sub-Saharan Africa: Experience from Interventions in Five Countries 12: Public-Private Partnership Supporting Women-driven Potato Seed Multiplication in the Lumwana Catchment Area of North-Western Province of Zambia 13: Risk of Uncontrolled Importation of Seed Potato from Europe to East and Central Africa: What Are the Policy Options? 14: Quality Seed Potato Production: Experiences From the Highlands of Ethiopia 15: A Possible Pathway for Developing Formal Seed Potato Production in Sub-Saharan African: A Case of Uganda Seed Potato Producers' Association (UNSPPA) 16: Potato Yield Variation as Affected by Virus Seed Degeneration and Growth Conditions in Tunisia 17: Potato Seed Certification in Kenya: Prospects, Achievements and Constraints 18: Adaptation and Improvement of the Seed-plot Technique in Smallholder Potato Production 19: Integration of In Vitro Techniques in Informal Seed Production Systems of Potato in Africa 20: Comparison Between Fluorescent Lamps and Light-emitting Diodes on In Vitro Growth of Potato Microplants and Subsequent In Vivo Performance and Minituber Production 21: An Analysis of Demand, Supply and Elasticities of Seed Potato in Major Producing Areas in Nigeria 22: An Alternative Technology for Pre-basic Potato Seed Production - Sand Hydroponics 23: Improving Seed Health and Seed Performance by Positive Selection in Three Kenyan Potato Varieties 24: Scaling Up the Adoption of Positive Selection and Seed-plot Techniques in Seed Potato Systems in Uganda - UNSPPA's Experience 25: Substrate and Genotype Effects on Growth for Seed Potato (Solanum tuberosum L.) Production in Malawi 26: Work of Multiple Organizations to Improve Seed Potato Health in the USA and an Example of Change to Reduce Potato Virus Y in Seed Potato Lots 27: Potato Virus Y in South Africa: Isolate Characterization and Assessment of Potato Cultivar Resistance Part III: Addressing Bottlenecks in the Sweetpotato Seed Systems 28: Can Small Still Be Beautiful? Moving Local Sweetpotato Seed Systems to Scale in Sub-Saharan Africa 29: Effect of Long-term In Vitro Subculturing on Quality Degeneration of Sweetpotato Varieties: Morpho-anatomic Assessment and Simple Sequence Repeat (SSR) Analysis 30: Shortage of Sweetpotato Planting Material Caused by Prolonged Dry Seasons in Africa: Strategies to Increase its Availability in Uganda 31: Evaluation and Promotion of Sustainable Seed Supply Systems for Vegetatively Propagated Crops in Central and Eastern Kenya Part IV: Tackling Disease and Crop Management in Potato and Sweetpotato 32: Disease Management, Especially Viruses in Potato and Sweetpotato 33: Insect Life Cycle Modelling (ilcym) Software - a Generic Platform for Developing Insect Phenology Models, Population Analysis and Risk Mapping 34: Phytophthora infestans Population Changes in Kenya Pose Challenges to Existing Potato Blight Control Strategies 35: Root Knot Nematodes and Soft Rot Enterobacteriaceae, Two Emerging Problems of Potatoes 36: Can Mineral Oil Protect Potato Seeds Against Aphid Transmission of Potato Virus Y? 37: The Farming Systems of Potential Potato Production Areas of Chencha, Southern Ethiopia 38: Aphids Infesting Potato in Kenya 39: Maize-Orange-fleshed Sweetpotato Intercropping: Potential for Use to Enhance Food Security and Scaling-up the Nutrition Effort in Malawi 40: Effect of Staking on Flower Induction, Pollination and Cross-compatibility Among Sweetpotato 41: Sweetpotato and Garden Egg Intercrop Compatibility Studies in Umudike, Nigeria 42: Nutrient Uptake and Yield Efficiency of Exotic Sweetpotato Cultivars Under Organic Soil Management Systems in Abeokuta Southwestern Nigeria Part V: Innovations in Marketing, Processing Technologies and Value Chain Management for Potato and Sweetpotato 43: On the Road to Potato Processing in African Tropical Highlands 44: Unlocking the Potential of the Potato Subsector in Kenya - a Roadmap for Revitalizing the Subsector 45: Potential of Processing Potato Flakes from Popular Kenyan Potato Varieties 46: Assessing Potato Production Efficiency through Contract Farming in Kenya: The Case of Bomet and Molo Farmers 47: Improvement of Processing Technology Research and Utilization of Sweetpotato and its Derived Foods in China and Rwanda 48: Building a Sustainable Sweetpotato Value Chain: Experience from Rwanda Sweetpotato Super Foods Project 49: Sweetpotato Value Chain Development in West Africa: Matching Products with Farmer Typology 50: Vacuum-frying Processing Technology Improves Quality Attributes of Fried Sweetpotato Chips 51: Price Integration of Sweetpotato Marketing: Implications for an Efficient Marketing System in Nigeria 52: Transaction Costs and Agricultural Household Supply: Response of Sweetpotato Farmers in Kwara State of Nigeria 53: Promotion of Vitamin A-enriched Sweetpotato for Production by Small-scale Commercial Farmers in South Africa 54: Getting the Equation Right: Engendering Sweetpotato Value Chains in East Africa Part VI: Evidence on Nutritional Value, Product Acceptance and Changing Behaviours Concerning Sweetpotato 55: Assessing Nutritional Value and Changing Behaviours Regarding Orange-fleshed Sweetpotato Use in Sub-Saharan Africa 56: Effect of Sweetpotato Meal and Composite Sweetpotato-meal-based Diets on Performance of Weaner Rabbits 57: Determining Availability of Nutrients in Sweetpotato Grown in the Kenyan Highlands Using In Sacco Degradability and In Vitro Digestibility 58: Sweetpotato-based Formulation: An Alternative Food Blend for Complementary Feeding 59: Evaluation of Sensory Quality Characteristics of Muffins Developed from Sweetpotato Flours

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• Part I: Advances in Sweetpotato and Potato Breeding 1: Advances in Sweetpotato Breeding from 1992 to 2012 2: Breeding Sweetpotato for Yield and Beta-carotene Content in Burkina Faso 3: Development of Dual-purpose Sweetpotato Varieties Through Participatory Breeding in Rwanda 4: Development and Evaluation of New Sweetpotato Varieties through Farmer Participatory Breeding for High Altitudes in Kenya 5: In Vitro Evaluation of Orange-fleshed Sweetpotato Genotypes for Drought Tolerance Using Polyethylene Glycol 6: Ex Ante Evaluation of Improved Potato Varieties for Sub-Saharan Africa 7: Durable Cisgenic Resistance to Phytophthora infestans in Potato and Perspectives for Applications in Africa 8: Exhibition Trial and Farmer Participatory Selection of New Late-blight Resistant B3C1 Potato Genotypes for Adaptation to Nigerian Conditions 9: Integrative Breeding Strategy for Making Climate-smart Potato Varieties for Sub-Saharan Africa 10: New Elite Potato Clones with Heat Tolerance, Late Blight and Virus Resistance to Address Climate Change Part II: Getting Potato Seed Systems Moving 11: Strategies to Improve Poor Seed Potato Quality and Supply in Sub-Saharan Africa: Experience from Interventions in Five Countries 12: Public-Private Partnership Supporting Women-driven Potato Seed Multiplication in the Lumwana Catchment Area of North-Western Province of Zambia 13: Risk of Uncontrolled Importation of Seed Potato from Europe to East and Central Africa: What Are the Policy Options? 14: Quality Seed Potato Production: Experiences From the Highlands of Ethiopia 15: A Possible Pathway for Developing Formal Seed Potato Production in Sub-Saharan African: A Case of Uganda Seed Potato Producers' Association (UNSPPA) 16: Potato Yield Variation as Affected by Virus Seed Degeneration and Growth Conditions in Tunisia 17: Potato Seed Certification in Kenya: Prospects, Achievements and Constraints 18: Adaptation and Improvement of the Seed-plot Technique in Smallholder Potato Production 19: Integration of In Vitro Techniques in Informal Seed Production Systems of Potato in Africa 20: Comparison Between Fluorescent Lamps and Light-emitting Diodes on In Vitro Growth of Potato Microplants and Subsequent In Vivo Performance and Minituber Production 21: An Analysis of Demand, Supply and Elasticities of Seed Potato in Major Producing Areas in Nigeria 22: An Alternative Technology for Pre-basic Potato Seed Production - Sand Hydroponics 23: Improving Seed Health and Seed Performance by Positive Selection in Three Kenyan Potato Varieties 24: Scaling Up the Adoption of Positive Selection and Seed-plot Techniques in Seed Potato Systems in Uganda - UNSPPA's Experience 25: Substrate and Genotype Effects on Growth for Seed Potato (Solanum tuberosum L.) Production in Malawi 26: Work of Multiple Organizations to Improve Seed Potato Health in the USA and an Example of Change to Reduce Potato Virus Y in Seed Potato Lots 27: Potato Virus Y in South Africa: Isolate Characterization and Assessment of Potato Cultivar Resistance Part III: Addressing Bottlenecks in the Sweetpotato Seed Systems 28: Can Small Still Be Beautiful? Moving Local Sweetpotato Seed Systems to Scale in Sub-Saharan Africa 29: Effect of Long-term In Vitro Subculturing on Quality Degeneration of Sweetpotato Varieties: Morpho-anatomic Assessment and Simple Sequence Repeat (SSR) Analysis 30: Shortage of Sweetpotato Planting Material Caused by Prolonged Dry Seasons in Africa: Strategies to Increase its Availability in Uganda 31: Evaluation and Promotion of Sustainable Seed Supply Systems for Vegetatively Propagated Crops in Central and Eastern Kenya Part IV: Tackling Disease and Crop Management in Potato and Sweetpotato 32: Disease Management, Especially Viruses in Potato and Sweetpotato 33: Insect Life Cycle Modelling (ilcym) Software - a Generic Platform for Developing Insect Phenology Models, Population Analysis and Risk Mapping 34: Phytophthora infestans Population Changes in Kenya Pose Challenges to Existing Potato Blight Control Strategies 35: Root Knot Nematodes and Soft Rot Enterobacteriaceae, Two Emerging Problems of Potatoes 36: Can Mineral Oil Protect Potato Seeds Against Aphid Transmission of Potato Virus Y? 37: The Farming Systems of Potential Potato Production Areas of Chencha, Southern Ethiopia 38: Aphids Infesting Potato in Kenya 39: Maize-Orange-fleshed Sweetpotato Intercropping: Potential for Use to Enhance Food Security and Scaling-up the Nutrition Effort in Malawi 40: Effect of Staking on Flower Induction, Pollination and Cross-compatibility Among Sweetpotato 41: Sweetpotato and Garden Egg Intercrop Compatibility Studies in Umudike, Nigeria 42: Nutrient Uptake and Yield Efficiency of Exotic Sweetpotato Cultivars Under Organic Soil Management Systems in Abeokuta Southwestern Nigeria Part V: Innovations in Marketing, Processing Technologies and Value Chain Management for Potato and Sweetpotato 43: On the Road to Potato Processing in African Tropical Highlands 44: Unlocking the Potential of the Potato Subsector in Kenya - a Roadmap for Revitalizing the Subsector 45: Potential of Processing Potato Flakes from Popular Kenyan Potato Varieties 46: Assessing Potato Production Efficiency through Contract Farming in Kenya: The Case of Bomet and Molo Farmers 47: Improvement of Processing Technology Research and Utilization of Sweetpotato and its Derived Foods in China and Rwanda 48: Building a Sustainable Sweetpotato Value Chain: Experience from Rwanda Sweetpotato Super Foods Project 49: Sweetpotato Value Chain Development in West Africa: Matching Products with Farmer Typology 50: Vacuum-frying Processing Technology Improves Quality Attributes of Fried Sweetpotato Chips 51: Price Integration of Sweetpotato Marketing: Implications for an Efficient Marketing System in Nigeria 52: Transaction Costs and Agricultural Household Supply: Response of Sweetpotato Farmers in Kwara State of Nigeria 53: Promotion of Vitamin A-enriched Sweetpotato for Production by Small-scale Commercial Farmers in South Africa 54: Getting the Equation Right: Engendering Sweetpotato Value Chains in East Africa Part VI: Evidence on Nutritional Value, Product Acceptance and Changing Behaviours Concerning Sweetpotato 55: Assessing Nutritional Value and Changing Behaviours Regarding Orange-fleshed Sweetpotato Use in Sub-Saharan Africa 56: Effect of Sweetpotato Meal and Composite Sweetpotato-meal-based Diets on Performance of Weaner Rabbits 57: Determining Availability of Nutrients in Sweetpotato Grown in the Kenyan Highlands Using In Sacco Degradability and In Vitro Digestibility 58: Sweetpotato-based Formulation: An Alternative Food Blend for Complementary Feeding 59: Evaluation of Sensory Quality Characteristics of Muffins Developed from Sweetpotato Flours

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• Part I: Advances in Sweetpotato and Potato Breeding 1: Advances in Sweetpotato Breeding from 1992 to 2012 2: Breeding Sweetpotato for Yield and Beta-carotene Content in Burkina Faso 3: Development of Dual-purpose Sweetpotato Varieties Through Participatory Breeding in Rwanda 4: Development and Evaluation of New Sweetpotato Varieties through Farmer Participatory Breeding for High Altitudes in Kenya 5: In Vitro Evaluation of Orange-fleshed Sweetpotato Genotypes for Drought Tolerance Using Polyethylene Glycol 6: Ex Ante Evaluation of Improved Potato Varieties for Sub-Saharan Africa 7: Durable Cisgenic Resistance to Phytophthora infestans in Potato and Perspectives for Applications in Africa 8: Exhibition Trial and Farmer Participatory Selection of New Late-blight Resistant B3C1 Potato Genotypes for Adaptation to Nigerian Conditions 9: Integrative Breeding Strategy for Making Climate-smart Potato Varieties for Sub-Saharan Africa 10: New Elite Potato Clones with Heat Tolerance, Late Blight and Virus Resistance to Address Climate Change Part II: Getting Potato Seed Systems Moving 11: Strategies to Improve Poor Seed Potato Quality and Supply in Sub-Saharan Africa: Experience from Interventions in Five Countries 12: Public-Private Partnership Supporting Women-driven Potato Seed Multiplication in the Lumwana Catchment Area of North-Western Province of Zambia 13: Risk of Uncontrolled Importation of Seed Potato from Europe to East and Central Africa: What Are the Policy Options? 14: Quality Seed Potato Production: Experiences From the Highlands of Ethiopia 15: A Possible Pathway for Developing Formal Seed Potato Production in Sub-Saharan African: A Case of Uganda Seed Potato Producers' Association (UNSPPA) 16: Potato Yield Variation as Affected by Virus Seed Degeneration and Growth Conditions in Tunisia 17: Potato Seed Certification in Kenya: Prospects, Achievements and Constraints 18: Adaptation and Improvement of the Seed-plot Technique in Smallholder Potato Production 19: Integration of In Vitro Techniques in Informal Seed Production Systems of Potato in Africa 20: Comparison Between Fluorescent Lamps and Light-emitting Diodes on In Vitro Growth of Potato Microplants and Subsequent In Vivo Performance and Minituber Production 21: An Analysis of Demand, Supply and Elasticities of Seed Potato in Major Producing Areas in Nigeria 22: An Alternative Technology for Pre-basic Potato Seed Production - Sand Hydroponics 23: Improving Seed Health and Seed Performance by Positive Selection in Three Kenyan Potato Varieties 24: Scaling Up the Adoption of Positive Selection and Seed-plot Techniques in Seed Potato Systems in Uganda - UNSPPA's Experience 25: Substrate and Genotype Effects on Growth for Seed Potato (Solanum tuberosum L.) Production in Malawi 26: Work of Multiple Organizations to Improve Seed Potato Health in the USA and an Example of Change to Reduce Potato Virus Y in Seed Potato Lots 27: Potato Virus Y in South Africa: Isolate Characterization and Assessment of Potato Cultivar Resistance Part III: Addressing Bottlenecks in the Sweetpotato Seed Systems 28: Can Small Still Be Beautiful? Moving Local Sweetpotato Seed Systems to Scale in Sub-Saharan Africa 29: Effect of Long-term In Vitro Subculturing on Quality Degeneration of Sweetpotato Varieties: Morpho-anatomic Assessment and Simple Sequence Repeat (SSR) Analysis 30: Shortage of Sweetpotato Planting Material Caused by Prolonged Dry Seasons in Africa: Strategies to Increase its Availability in Uganda 31: Evaluation and Promotion of Sustainable Seed Supply Systems for Vegetatively Propagated Crops in Central and Eastern Kenya Part IV: Tackling Disease and Crop Management in Potato and Sweetpotato 32: Disease Management, Especially Viruses in Potato and Sweetpotato 33: Insect Life Cycle Modelling (ilcym) Software - a Generic Platform for Developing Insect Phenology Models, Population Analysis and Risk Mapping 34: Phytophthora infestans Population Changes in Kenya Pose Challenges to Existing Potato Blight Control Strategies 35: Root Knot Nematodes and Soft Rot Enterobacteriaceae, Two Emerging Problems of Potatoes 36: Can Mineral Oil Protect Potato Seeds Against Aphid Transmission of Potato Virus Y? 37: The Farming Systems of Potential Potato Production Areas of Chencha, Southern Ethiopia 38: Aphids Infesting Potato in Kenya 39: Maize-Orange-fleshed Sweetpotato Intercropping: Potential for Use to Enhance Food Security and Scaling-up the Nutrition Effort in Malawi 40: Effect of Staking on Flower Induction, Pollination and Cross-compatibility Among Sweetpotato 41: Sweetpotato and Garden Egg Intercrop Compatibility Studies in Umudike, Nigeria 42: Nutrient Uptake and Yield Efficiency of Exotic Sweetpotato Cultivars Under Organic Soil Management Systems in Abeokuta Southwestern Nigeria Part V: Innovations in Marketing, Processing Technologies and Value Chain Management for Potato and Sweetpotato 43: On the Road to Potato Processing in African Tropical Highlands 44: Unlocking the Potential of the Potato Subsector in Kenya - a Roadmap for Revitalizing the Subsector 45: Potential of Processing Potato Flakes from Popular Kenyan Potato Varieties 46: Assessing Potato Production Efficiency through Contract Farming in Kenya: The Case of Bomet and Molo Farmers 47: Improvement of Processing Technology Research and Utilization of Sweetpotato and its Derived Foods in China and Rwanda 48: Building a Sustainable Sweetpotato Value Chain: Experience from Rwanda Sweetpotato Super Foods Project 49: Sweetpotato Value Chain Development in West Africa: Matching Products with Farmer Typology 50: Vacuum-frying Processing Technology Improves Quality Attributes of Fried Sweetpotato Chips 51: Price Integration of Sweetpotato Marketing: Implications for an Efficient Marketing System in Nigeria 52: Transaction Costs and Agricultural Household Supply: Response of Sweetpotato Farmers in Kwara State of Nigeria 53: Promotion of Vitamin A-enriched Sweetpotato for Production by Small-scale Commercial Farmers in South Africa 54: Getting the Equation Right: Engendering Sweetpotato Value Chains in East Africa Part VI: Evidence on Nutritional Value, Product Acceptance and Changing Behaviours Concerning Sweetpotato 55: Assessing Nutritional Value and Changing Behaviours Regarding Orange-fleshed Sweetpotato Use in Sub-Saharan Africa 56: Effect of Sweetpotato Meal and Composite Sweetpotato-meal-based Diets on Performance of Weaner Rabbits 57: Determining Availability of Nutrients in Sweetpotato Grown in the Kenyan Highlands Using In Sacco Degradability and In Vitro Digestibility 58: Sweetpotato-based Formulation: An Alternative Food Blend for Complementary Feeding 59: Evaluation of Sensory Quality Characteristics of Muffins Developed from Sweetpotato Flours