Fig. 8

Models of the domestication process of soybean. a Rounds of hybridization involving diverse G. soja accessions counteracted genetic bottleneck during domestication and contributed to rapid varietal diversification and adaptation of landraces to diverse environments, a model supported by this study. Lines with arrows at both ends indicate rounds of hybridization events involving diverse G. soja accessions. The curved arrows indicate recurrent selection against introgression. b A hypothetical model of the domestication process of soybean without interspecific introgression that would have resulted in stronger domestication bottleneck