Several types of substrates were evaluated for seed-potato minituber production of three cultivars, using sprouts as a propagation material. The experimental design was of randomized blocks distributed on a 7x3 factorial model containing three replicates of each treatment. Seven substrate types were evaluated: (1) autoclaved soil; (2) autoclaved soil + Plantmax (2:1); (3) autoclaved soil + coconut fiber (2:1); (4) coconut fiber; (5) Plantmax; (6) Plantmax + carbonized rice shell (2:1); and (7) vermiculite and the potato cultivars Asterix, Monalisa and Ágata. The substrates Plantmax and coconut fiber and the sprouts originated from the tree potato cultivars are viable for this propagation type.
Solanum tuberosum; sprouts; seed potato; propagation
