Soybean (Glycine max L.) is the most cultivated oilseed crop in the world, mainly because it combines moderate oil content and high amount of protein, which represents approximately 20–40% of its total mass, respectively (Shukla et al., 1992). Data from the United States Department of Agriculture indicate an estimated global soybean production in 2013/14 of 283.95 million metric tons. This estimate shows US ranking as first in world on soybean production, followed by Brazil and Argentina, representing 31.52%, 30.82% and 19.05% of global production, respectively (USDA, 2014).