Water yam (Dioscorea alata L.) diversity pattern in Brazil: an analysis with SSR and morphological markers - Siqueira, Marcos V. B. M; Bonatelli, Maria L; Gunther, Torsten; Gawenda, Inka; Schmid, Karl J; Pavinato, Vitor A. C; Veasey, Elizabeth Ann (Genetic Resources and Crop Evolution, 2014)