Everything you ever wanted to know about sweetpotato, Topic 5: Sweetpotato seed systems - Stathers, T.; McEwan, M.; Gibson, R.; Mwanga, Robert O.M.; Carey, E.E.; Namanda, S.; Low, Jan W.; Ogero, K.; Rajendran, S.; Abidin, P.E.; Malinga, J.; Agili, S.; et al. (International Potato Center, 2018)