Without diversity, these crops do not provide wholesome nutrition. According to Graziano da Silva (FAO, 2012a), dependence on a few crops has adverse consequences for ecosystems, food diversity and health. Food monotony also increases the risk of micronutrient deficiency. The world population is around 7 billion and is expected to increase to 9.7 billion by 2050 (UN, World Population Prospects, 2015).