Combining ability through line by tester analysis for root yield and total carotenoid concentration in biofortified cassava genotypes - Ogwuche, T.O.; Akoroda, M.O.; Oyebode, G.O.; Parkes, Elizabeth Y.; Iluebbey, Peter O.; Adetoro, N.A.; Aina, O.O.; Olaniyo, E.E.; Owoade, D.; Bakare, M.A.; Ikpan, A.S.; Kulakow, Peter A. (International Society for Tropical Root Crops, 2017)