Kristin (USDA-ARS, University of Missouri, Columbia, USA) Bilyeu & Chittaranjan (Clemson University, South Carolina, USA) Kole 
Genetics, Genomics, and Breeding of Soybean [PDF ebook] 

The soybean is an economically important leguminous seed crop for feed and food products that is rich in seed protein (about 40 percent) and oil (about 20 percent); it enriches the soil by fixing nitrogen in symbiosis with bacteria. Soybean was domesticated in northeastern China about 2500 BC and subsequently spread to other countries. The enormous