Fig. 5

Characteristics of diploid species. a Development and germplasm data for species that are listed in the simplified phylogeny on the left. A. evenia from the Nod-independent clade (NI) is also included for comparison. Germplasm numbers correspond to the sum of accessions available at CIAT, USDA, Kew Gardens, AusPGRIS, IRRI and at LSTM. b Multi-dimensional scaling (MSD) plots of the genetic diversity among A. americana (left) and A. villosa (right) accessions according to coordinates 1 and 2 (C1, C2). Identified groups are delimited by circles and labeled with numbers. c Geographical distribution of the of the A. americana and A. villosa accessions. Taxon colours and group numbers are the same as in (b). Details of the accessions are provided in Additional file 16: Table S4. Word map from https://pixabay.com