Domestication of crop plants is estimated to have occurred within the past 12,000 years, and currently domesticated crops supply over 70% of human calories. While domestication has improved wild crop relatives, there are direct and indirect costs of domestication. The domestication of wild soybean (Glycine soja) into cultivated soybean (Glycine max) led to many important agronomic traits like lodging resistance, permeable seed coats, reduced pod shattering, and easier mechanical harvest which revolutionized agriculture. However, domestication may have changed the legume-rhizobia symbiosis. Previous literature has suggested that elite cultivars of soybean associate less with rhizobia and derive fewer benefits from rhizobia, when compared to their wild ancestors. It remains unclear to what extent domestication and modern breeding practices have influenced legume-rhizobia symbiosis. GEMS trainee Amanda Griffin aims to understand how soybean domestication has changed reliance on microbial communities (Bradyrhizobium), partner quality through time, and how particular domestication traits in soybean affect the evolution of Bradyrhizobium over time.