Legume Federation

ALT Population stratification based on discriminant analysis of principal components (DAPC). (a) DAPC of soybean germplasmaccessions at different stages of breeding selection from the two soybean gene pools, using pre-defined breeding pools as groups. (b) Number ofgroups determined by the elbow method forK-means clustering. (c) DAPC based on the groups identified using K-means clustering. (d) Relationbetween pre-defined populations and the groups identified by theK-means clustering algorithm. Aa, alternative gene pool—ancestral population; Ae,alternative gene pool—elite population; Ai, alternative gene pool—intermediate population; Ca, conventional gene pool—ancestral population; Ce,conventional gene pool - elite population; Ci, conventional gene pool—intermediate population.