Orange-fleshed cultivars are rich in beta-carotene and thus used in food-based programs to address vitamin A deficiency. LAURIE, S.M., BOOYSE, M., LABUSCHAGNE, M.T., GREYLING, M.M., 2015. Journal of Plant Breeding and Crop Science Vol. Loosen the soil thoroughly by either ploughing or using a fork, hand hoe or spade. You can recognize a garnet sweet potato thanks to its dark orange-red skin, which conceals bright orange flesh. They're even more moist than jewels or Beauregards, which makes them great for baking projects; they're our ideal sweet potato for pie, mashed sweet potato casserole, and nice and simple mashed sweet potatoes. (2014). •Sweet potato cultivars can be found in variety of colours. Laurie, R.N., Laurie, S.M., du Plooy, C.P., Finnie, J.F. Journal of the Science of Food and Agriculture. Sweet potato is a warm season crop, which means that warm days and nights are essential for optimum growth and development. Also, sweet potatoes are native to the Americas, whereas yams come from Asia and Africa. Yam is the common name for some plant species in the genus Dioscorea (family Dioscoreaceae) that form edible tubers. Journal of Agricultural Science and Technology A&B 4(10A):811-821. Sweet potatoes grow well in sandy-loam, loam or clayey-loam soil. Lam.) Greenhouse and field evaluation of selected sweetpotato (Ipomoea batatas (L.) LAM) accessions for drought tolerance in South Africa. Food Research International 76: 962-970. We start shipping Sweet Potato Pre-Orders in the week beginning the 16th November, if you would like a heads-up please join our mailing list. In: Nyongesa, M., Quinn, S., Parker, M., & Low, J. Scientia Horticulturae 142: 180-184. & VAN HEERDEN, S.M. Poke a few holes into each potato with a fork or knife, and then bake in an oven preheated to 350-375 F (175-190 C) until a fork goes in easily (this takes approximately 45-90min – exact time depends on how large the potato is). 5(9): 182-186. Orders cannot be separated. Sweet potatoes are sensitive to low temperatures, especially frost. In most of sub-Saharan Africa, people only knew of sweet potato varieties that were white inside — the types that came to Africa from South America in the 1600s. In some cases, parents are grafted on Effect of Different Types of Mulching and Plant Spacing on Weed Control, Canopy Cover and Yield of Sweet Potato (Ipomoea batatas (L.) Lam). (2013). 2015. The skin can for example be white, yellow, pink, orange, purple or reddish brown. American Journal of Plant Sciences 5(21):3328-3339. cultivar trials at 2-3 sites in South Africa for two years. Laurie S.M., Faber M., Adebola P., Belete A., 2015. The ARC also has Sweet potato is relatively easy to grow in the right conditions. cultivar recommendations. Blesbok, Bosbok and Ribbok. Cultivar development of sweet potato has, up to now, been largely Laurie, S.M., Faber, M., van Jaarsveld, PJ, Laurie, R.N., du Plooy, C.P. Multi-environment performance of new orange-fleshed sweetpotato varieties in South Africa. Orange-fleshed sweet potato is a very useful food for school feeding. Annually approximately 20000 plantlets in seedling trays are produced. The storage roots can be found in different colours. Cut 20-30 cm healthy, insect and disease free cuttings with a clean pruning shear or sharp knife. If you see pictures of yams and sweet potatoes together, it may be hard to tell them apart. LABONTE, AND G.C. However, storage is a difficult task as sweet potatoes are very vulnerable to spoilage. YENCHO. In this way the sweet potato industry in South Africa remains profitable. Sweet potatoes grow well in sandy-loam, loam or clayey-loam soil. Malebana, M.E. to Ipomoea setosa to induce flowering. The seeds are harvested (±15 000), scarified and raised Indigenous floriculture crops | Indigenous/traditional African vegetables | Potatoes | Genebanks | Biotechnology | Agro-processing | Commercial Vegetables___________________________________________________________________________________________________________________________________________________________________________, Team Leader: Dr. Sunette Laurie, Breeding - Andrè van den Berg, Whelma Mphela,  Lesego Selokela, Sidwell Tjale, Musa Mtileni, Piet Ribisi, Lazarus Masuku, and Obed Moikangwe, Glasshouse genebank maintenance -  Vusi Nkosi and Lesego Selokela, In vitro gene bank maintenance - Nokuthula Myeza, Disease-indexing multiplication scheme - Lesego Selokela and Vusi Nkosi, Virus diagnostics, molecular markers, genomics and transgenic research - Dr Inge Gazendam. (2012). In addition to being sweet and flavorful, they retain their lovely … : Beauregard, Hernandez, Beerwah Gold, NC-3, LO-323, Centennial, Darby and Jewel. Although the leaves and shoots are also edible, the starchy tuberous roots are by far the most important product. New varieties and lines have been released for the various markets in South Africa, PRODUCTION MANUAL - Guide to Sweet potato production. 2016. The objective of this study was to screen 12 selected biofortification sweet potato cultivars for host-status to South Africa tropical root-knot (Meloidogyne species) nematodes. Current research efforts give attention to tolerance to Fusarium wilt, stem and leaf blight and nematodes. Sweet Potatoes have a rich history in Africa and around the world. Loosen the soil to a depth of 250-300 mm for good root aeration, root penetration and drainage. Material Transfer Agreement with ARC to evaluate new breeding lines for Employing the GGE SREG model plus Elston index values for multiple trait selection in sweetpotato. sweet potato genebank, sweet potato disease-indexing scheme, dissemination of varieties and Please turn on JavaScript and try again. CAREY, K. HUAMANI, F. DIAZ, R. EYZAGUIRRE, E. GUAF, M. JUSUF, A. KARUNIAWAN, K. TJINTOKOHADI, Y.-S. SONG, M. HOSSAIN, E. RAHAMAN, ATTALURI, K. SOME, S. AFUAPE, K. ADOFO, E. LUKONGE, L. KARANJA, J. NDIRIGWE, G. SSEMAKULA, S. AGILI, J.-M. RANDRIANAIVOARIVONY, M. CHIONA, F. CHIPUNGU, S. LAURIE, J. RICARDO, M. ANDRADE, F. RAUSCH FERNANDES, A. S. MELLO, A. KHAN, D.R. Sometimes cuttings are prepared from storage roots: Plant the storage roots just covered with soil. & Van Staden, J., 2015. CABI. The longer the sweet potato tubers are in the ground, the higher the vitamin content and the larger the sweet potato tubers. In the group for early cultivars (less than … Sweet potato (lpomoea batatas) is not related to the common potato. Effect of long-term invitro sub-culturing on quality degeneration of sweet potato varieties: Morpho-anatomic assessment and simple sequence repeats (SSR) analysis. The sweet potato weevil is the most common pest you are likely to find. Commonly three distinct types of sweet potato available for commercial pro-duction include: 1) Orange/copper skin with orange fl esh, e.g. African Crop Science Journal 24(1): 63-71. with traits required in the breeding program are imported from, e.g. In some tropical areas, they are a staple food crop. increased production under unfavourable biotic and abiotic conditions. Please enable scripts and reload this page. The ARC-VOP has an excellent history in sweet potato breeding since 1952. yield trial at two locations. Sweet potato belongs to the morning glory family and produces edible storage roots. The collection contains virtually all commercially grown cultivars, new improved varieties for African consumers and β-carotene rich varieties used … 2014. You may be trying to access this site from a secured browser on the server. The leaves may be removed from stem cuttings before planting, but it is not necessary. Identifying Non-Host Sweet Potato Cultivars To Combat Nematodes Farmer's Weekly | September 04, 2020 The root-knot nematode can cause major financial losses for sweet potato farmers if not managed effectively. Registered under the names ‘Impilo’ and ‘Purple Sunset’, they're … Sweet potato may be not as popular as other vegetables such as potatoes and tomatoes, but still plays an important role in South Africa in terms of food security and alleviating malnutrition. In addition, orange-fleshed cultivars in particular are prominent in combating vitamin A deficiency due to high content of naturally bio-available β-carotene. The plant is somewhat drought tolerant once the storage roots have formed. Orange-fleshed types are rich in beta-carotene, a pro-vitamin A carotenoid that is converted to vitamin A by the human body. Remove stones and break hard layers to ensure good root penetration. Laurie, S.M., Tjale, S.S., van den Berg, A.A., Mtileni, M.M. GRÜNEBERG, W.J., D. MA, R.O.M. Already in the 1960’s, yield degeneration was experienced by commercial farmers to such extent that it was uneconomical to grow those sweet potato cultivars. Stony or clay soil is not good, as it does not allow the formation (development) of good storage roots. (2014). small-holder farmers, promoting cultivation of new cultivars for food activities will include the identification of molecular markers linked to 12(25): 3947-3951. (Read more...). Laurie, S.M. ​Research on sweet potato include the following areas: sweet potato breeding and cultivar trials, This limit the transmission of diseases to clean soils, reduces distribution of viruses causing yield loss and also ensures that the cultivars remains true to type. That could soon change. the Genetic studies of sweetpotato for two important agronomic traits: yield and flesh colour (Masters thesis). Three exotic orange-fleshed, three local orange-fleshed and six cream-fleshed cultivars were used in three separate experiments of M. javanica and races 2 and 4 of M. Chapter 1. 2012. MWANGA, E.E. breeding tools into applied breeding efforts for this crop. Most of these cultivars are cream-fleshed and three of these are the main commercialized cultivars currently planted in South Africa, namely, Potato seeds are one of the most important and obvious inputs in this business. Sweet potatoes are rich sources of energy but also contributes vitamin C and minerals such as magnesium, copper, iron and zinc to the human diet. In the July–August 2015 issue of Crop Science, lead authors Maryke Labuschagne of South Africa's University of the Free State and Sunette Laurie of the Agricultural Research Council, describe two promising, orange varieties of sweet potato that are especially suited to the country's environmental conditions. LAURIE, S.M., BOOYSE, M., LABUSCHAGNE, M.T., GREYLING. To date, 25 cultivars have been released from the breeding program. After 2-3 months, the small roots are sectioned and Only promising lines proceed to the intermediate Pieces of stem of 20-30 cm long should be taken for cuttings. Journal of Food Composition and Analysis 27:151-9. These LABONTE, AND G.C. Potatoes South Africa has classified spuds into three categories, each suitable for a specific cooking method. Magwaza LS, Naidoo SIM, Laurie SM, Laing MD, Shimelis H. 2016. Trans-β-carotene, selected mineral content and potential nutritional contribution of 12 sweetpotato varieties. African Journal of Food Science 6(4):96-103. Potato cultivars available in South Africa can be divided into three groups according to the length of their growing periods. & BOOYSE, M., 2015. MWANGA, E.E. & Labuschagne, M.T., 2015. Naidoo S.I.M, Laurie, S.M., Odeny, D.A., Vorster, B.J., Mphela, W.M., Greyling, M.M. Naidoo, S.I.M. frozen products, crisps, baby foods, etc. 2015. Intensive South African biofortification efforts using exotic and local sweet potato (Ipomoea batatas) cultivars have hardly considered the inclusion of … T: +27 (13) 235 3891 C: +27 (82) 524 8391 (2013). USA or the International Potato Center (CIP). South African orange cultivars such as Beauregard have long, cylindrical to heavy elliptic tubers. SouthAfrican Journal of Botany 85: 10-16. Single Plants: 45cm (1' 5") each way (minimum) Rows: 45cm (1' 5") with 60cm (1' 11") row gap (minimum) Hundayehu, M., Du Toit, E., Laurie, S., Steyn, M., Greyling, R., Myeza, N. 2014. Yams are perennial herbaceous vines cultivated for the consumption of their starchy tubers in many temperate and tropical regions, especially in Africa, South America and the Caribbean, Asia, and Oceania. Plant them in your prepared bed by covering half of its length in wet soil. There is therefore a need to integrate modern Potato and sweetpotato in Africa: transforming the value chains for food and nutrition security. Ipomea batatas. Optimum pH (H20) is 5.6 - 6.5. agronomic, nutritional and resistance traits and using this information in the Genotype x environment interaction and yield stability estimate of some sweet potato [Ipomoea batatas (L.)Lam] breeding lines in South Africa. β-carotene yield and productivity of orange-fleshed sweet potato (Ipomoea batatas L. Induced mutation in sweet potato aimed at improved quality and drought adaptation. WAXY (Cultivars include Mondial, Fabula and BP13) (Cultivars include BP1, VDP, Fianna, Valor, and Sifra aka Bianca) These potatoes are somewhat moist with a slightly floury texture. & Pillay M. 2013. The use of sensory attributes, sugar content, instrumental data and consumer acceptability in selection of sweet potato varieties. trial for two years. Additional varieties grown in South Africa include: Markies, Avalanche, Valor, Lanorma, Fabula, Innovator, Hertha and the Frito-Lay cultivar FL2108 Agricultural Statistics South Africa 1 To date, 25 cultivars have been released from the breeding program. The breeding efforts also aim at traits of importance to the commercial industry, such as high quality, as well as high yielding sweet potato varieties for export, local markets and processing,  e.g. American Journal of Experimental Agriculture 5(5): 450-458. (2012). South Africa Online (Pty) Ltd. SouthAfrica.co.za. •ARC- Roodeplaat breeding programme is breeding cultivars with: Good yield, good taste Wide adaptability Drought tolerance. and Crampton, B.G. Characterization and evaluation of South African sweet potato (Ipomoea batatas (L.) LAM) land races. South African Journal of Plant & Soil 32(3):147-155. as influenced by irrigation and fertilizer application treatments. For many resource-poor farmers and households it is a reliable source of food because it is a hardy crop, and for other South Africans it is the traditional “soet patat” or batata. Potato Seed Production is one of the largest producers of potato mini-tubers in South Africa and has been providing high-quality potato seeds since 1971. & Laurie S.M. These are the variety most commonly available in supermarkets. All Rights Reserved. In South Africa, this food source is of great importance as a recent survey indicated that 43.6% of children 1-5 year olds (a level which is considered as a serious public health problem) and 27% of women in reproductive age are vitamin A deficient. phenotype-based selection. Potatoes South Africa is a Non-profit company under the Companies Act 71, 2008 (Act 71 of 2008). - Andrè van den Berg, Whelma Mphela,  Lesego Selokela, Sidwell Tjale, Musa Mtileni, Piet Ribisi, Lazarus Masuku, and Obed Moikangwe, GRÜNEBERG, W.J., D. MA, R.O.M. When sprouts are 25-30 cm long, break them off and use for planting. Viruses are the most limiting factor in production of sweet potato causing considerable loss of yield and also influence the quality. The breeding efforts aim at traits that are of importance to resource-poor farmers, namely, high dry matter content combined with high yield and high beta-carotene content, as well as additional tolerance to drought and disease. The ARC-VOP has an excellent history in sweet potato breeding since 1952. Doi:10.4236/ajps.2014.521347, Pofu K.M., Mashela P.W. Potato and sweetpotato in Africa: transforming the value chains for food and nutrition security. The US$4 million project that began in April 2014 and ended last month (March 2017) was funded by the Bill and Melinda Gates Foundation and implemented in Burkina Faso, Ghana and Nigeria. The leaves provide additional proteins, vitamins and minerals.
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