Two experiments were carried out at the Gorutuba Experimental Field, Porteirinha-MG, Brazil, from November 1990 to April 1991, to evaluate sweet potato cultivars under irrigated and dryland conditions. The experimental design was a complete randomised block with eight cultivars (Brazlândia Branca, Brazlândia Rosada, Brazlândia Roxa, Coquinho, Princesa, Arroba, Rama Roxa and Paulistinha) and five replications. Under irrigated conditions, the cultivars Brazlândia Branca showed the highest yield (22.3 t/ha) followed by Paulistinha (21.3 t/ha) and Princesa (19.0 t/ha) with no significant differences among them. The cultivar Brazlândia Roxa showed the lowest yield (13.5 t/ha) as well as the highest non-commercial yield (7.2 t/ha). Mean root weight under irrigation, varied from 219.9 g (Brazlândia Roxa) to 337.6 g (Brazlândia Rosada). Under dryland conditions, the cultivar Paulistinha showed the highest yield (17.6 t/ha), followed by Princesa (12.3 t/ha), Brazlândia Branca (10.9 t/ha) and Rama Roxa (10.2 t/ha), with no significant differences among the last three cultivars. The lowest commercial yield (8.2 t/ha) and the highest non-commercial yield (6.9 t/ha) were showed by the cultivar Brazlândia Roxa. Root mean weight under dryland conditions varied from 124.4 g (Brazlândia Roxa) to 249.9 g (Paulistinha).
Ipomoea batatas; commercial yield; non-commercial yield; performance
