Germplasm banks have as their main purpose to get together in one place part of the genetic variability (germplasm), in order to prevent the loss of genes or gene combinations (genetic erosion), thus ensuring a broad genetic basis for research programs. Germplasm banks are usually made up of local races (ethnovarieties), improved varieties and wild species of the same genus. And because they bring together genetic constitutions of different origins and different breeding levels, they can be great sources of genes. However, collection, exchange, conservation, characterization, evaluation and documentation actions are necessary to ensure the maintenance, enrichment and information about the collections, aiming at the expansion of its use for the benefit of national agriculture.