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Robert O.M. Mwanga, Benson Odongo, Charles Niringiye, Agnes Alajo, Putri E. Abidin, Regina Kapinga, Silver Tumwegamire, Berga Lemaga, James Nsumba and Edward E. Carey

Two orange-fleshed landrace sweetpotato [ Ipomoea batatas L. (Lam.)] cultivars named ‘SPK004’ (‘Kakamega’) and ‘Ejumula’ were approved for release by the Ugandan Plant Variety Release Committee in Apr. 2004 ( Mwanga et al., 2004a ). This is the

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Susan C. Miyasaka, Marisa Wall, Don LaBonte and Alton Arakaki

Sweetpotato is a nutritious source of food. Orange-fleshed cultivars are rich in β-carotene and purple-fleshed cultivars are rich in anthocyanins, both of which are important dietary antioxidants ( Teow et al., 2007 ; Wang et al., 2016 ). In the

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Silver Tumwegamire, Regina Kapinga, Patrick R. Rubaihayo, Don R. LaBonte, Wolfgang J. Grüneberg, Gabriela Burgos, Thomas zum Felde, Rosemary Carpio, Elke Pawelzik and Robert O.M. Mwanga

cultivated sweetpotato clones of the world is ≈30% ( Bradbury and Holloway, 1988 ; Woolfe, 1992 ). Two main taste groups can be distinguished: 1) white- and cream-fleshed sweetpotatoes usually with DM contents of ≈25% to 35%; and 2) orange-fleshed

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David Wees, Philippe Seguin, Josée Boisclair and Chloé Gendre

of 15 sweetpotato cultivars and selected lines including common orange-fleshed types, some heirloom cultivars, and some specialty types with yellow or white flesh. Although less well known among North American consumers, yellow and white cultivars may

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G. Craig Yencho, Kenneth V. Pecota, Jonathan R. Schultheis, Zvezdana-Pesic VanEsbroeck, Gerald J. Holmes, Billy E. Little, Allan C. Thornton and Van-Den Truong

averaged 2:1 for ‘Covington’ compared with 2:5 for ‘Beauregard’ averaged over 45 trials in North Carolina. Storage root skin color varies from light to medium rose (33D to 34D) and tends to darken during storage. Flesh color is a uniform orange (28B to 28C

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Fekadu Gurmu, Shimelis Hussein and Mark Laing

. 2015a Diagnostic assessment of sweetpotato production in Ethiopia: Constraints, post-harvest handling and farmers’ preferences Res. Crops 16 1 104 115 Gurmu, F. Hussein, S. Laing, M. 2015b The potential of orange-fleshed sweetpotato to prevent vitamin A

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Cecilia E. McGregor and Don R. LaBonte

hard work during development of the sweetpotato ARCS_Sp02 microarray.

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Malkeet S. Padda and David H. Picha

Phenolic compounds and antioxidant activity were quantified in the principal sweetpotato cultivars marketed in the European Union. Total phenolic content, individual phenolic acids, and antioxidant activity in each cultivar were determined using Folin-Denis reagent, reversed-phase HPLC, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) methods, respectively. Significant differences in phenolic composition and antioxidant activity were found between cultivars. A Jamaican-grown, white-fleshed cultivar had the highest total phenolic content [4.11 mg·g-1 chlorogenic acid (dry tissue weight)], while the highest antioxidant activity [3.60 mg·g-1 Trolox (dry tissue weight)] was observed in the orange-fleshed California-grown cultivar Diane. Chlorogenic acid and 3,5-dicaffeoylquinic acid were the predominant phenolic acids, while caffeic acid was the least abundant in most cultivars. The highest content of chlorogenic acid (0.42 mg·g-1 dry tissue weight); 3,5-dicaffeoylquinic acid (0.43 mg·g-1 dry tissue weight); and 3,4-dicaffeoylquinic acid (0.25 mg·g-1 dry tissue weight) was present in the white-fleshed Jamaican cultivar. The orange-fleshed cultivars Diane and Beauregard had the highest content of caffeic acid (0.13 mg·g-1 dry tissue weight) and 4,5-dicaffeoylquinic acid (0.32 mg·g-1 dry tissue weight), respectively.

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Robert O.M. Mwanga, Benson Odongo, Charles Niringiye, Agnes Alajo, Benjamin Kigozi, Rose Makumbi, Esther Lugwana, Joweria Namukula, Isaac Mpembe, Regina Kapinga, Berga Lemaga, James Nsumba, Silver Tumwegamire and Craig G. Yencho

Five sweetpotato [ Ipomoea batatas L. (Lam.)] cultivars named NASPOT 7 (Namulonge Sweetpotato 7), NASPOT 8, NASPOT 9 O (Namulonge Sweetpotato 9 orange-fleshed), NASPOT 10 O, and Dimbuka-Bukulula were approved for release by the Ugandan Plant

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J.R. Bohac, P.D. Dukes, A. Jones, J.M. Schalk, H.F. Harrison Jr., S.C. Charleston and M. G. Hamilton

Carolina Bunch is a sweetpotato cultivar that combines high yield, excellent flavor and appearance with multiple pathogen and pest resistances. It is ideal for home or market gardens, because of its short vine and bunch habit that allow for production of high yields in a limited space. The roots are fusiform with uniform shape and a smooth, bright, light copper skin and dark orange flesh. When baked, the roots have a smooth texture and are sweet, moist and have excellent flavor and appearance. This sweetpotato can be grown virtually without pesticides. It has very high levels of resistances to southern root knot and other species of nematodes, Fusarium wilt, feathery mottle virus, sclerotial blight in plant beds, and Streptomyces soil rot. It has good resistance to many soil insects including several species of wireworm, Diabrotica, Systena, and flea beetles. In the southern US, it yields better than `Jewel' in a growing season of 110-120 days. Foundation roots are available in limited quantities from South Carolina Foundation Seed Association, Inc, 1162 Cherry Hill Rd, Clemson SC 29634-0393.