Figure 1
From: Dissecting the Genetic Basis of Local Adaptation in Soybean
Population structure, diversity, and geographical relationships among 3,012 soybean landraces. (a) Results of fastSTRUCTURE analysis in G. max accessions and the geographical location in which each accession was collected. The spot colors correspond to the fastSTRUCTURE assignment (with subpopulation ancestry >80%) of each accession that generally accords with geography. The spots have been jittered to show overlapping samples. Maps were created with the RgoogleMaps 54. (b) Using principal component (PC) analysis of SNP data, the top two PCs which mainly accounted for geographic origin differences explained ~13% of total genetic variation. (c) Each colored vertical line in the barplot represents an individual accession that was assigned proportionally to the one of the three clusters. Subpopulation (SP) 1 (green cluster) represents the accessions collected from Korea; SP3 (blue cluster) forms a unique SP comprised primarily of accessions from Japan; SP2 (red cluster) is composed predominantly of accessions collected from China.
