Computational and Systems Biology, Rothamsted Research, West Common, Harpenden, United Kingdom.|Computational and Systems Biology, Rothamsted Research, West Common, Harpenden, United Kingdom.|Computational and Systems Biology, Rothamsted Research, West Common, Harpenden, United Kingdom.|Root Crops Research Programme, National Crops Resources Research Institute, Namulonge, Kampala, Uganda.|Root Crops Research Programme, National Crops Resources Research Institute, Namulonge, Kampala, Uganda.|Zambia Agriculture Research Institute, Plant Protection and Quarantine Division, Mt. Makulu Research Station, Chilanga, Zambia.|Department of Plant Sciences, University of Cambridge, Cambridge, United Kingdom.