This study aimed to evaluate five accessions of tannia. The experiment was carried out in field at the Universidade Federal de Montes Claros, Minas Gerais State, Brazil, from June 2010 to June 2011. The experimental design consisted of randomized blocks with five treatments and four replications, a total of 20 plots. Treatments consisted of five accessions of tannia obtained at Universidade Federal de Viçosa (Viçosa 1, Viçosa 2 and Viçosa 3), Universidade Federal da Grande Dourados (Dourados), and a local accession (Montes Claros). The experimental plot comprised four rows spaced 0.5 m apart, with 2.5 m in length. The distance between plants in the row was 0.5 m. The agronomical characteristics evaluated were yield of corms, cormels, marketable cormels and total, fresh and dry weight of marketable cormels, number of marketable cormels per plant and the cormel yield of classes (based on the smallest diameter): large (≥30 mm), medium (20-29 mm), small (10-19 mm) and noncommercial (<10 mm). The Viçosa 1, Montes Claros, Viçosa 2 and Viçosa 3 accessions presented higher values of total yield and cormels. Primary components presenting high positive correlation in comparison to marketable yield were: yield of medium cormels (0.9543**), marketable cormels fresh weight (0.8242**) and number of marketable cormels per plant (0.8242**).
Xanthosoma riedelianum; yam; underutilized vegetables.
