Fig. 2
From: Diversity and population structure of Nordic potato cultivars and breeding clones
Population structure based on single nucleotide polymorphism (SNP) markers revealed by STRUCTURE (A and C) and heatmap with dendrogram showing the genetic diversity based on Nei’s genetic (B) distance among the 133 accessions. The proposed number of subpopulations (K) was determined according to STRUCTURE as 2 (grey or red), while the assumed number of subpopulations was 3 – cultivar, farmer’s cultivar and breeding clone (A); or cultivar grown today in Sweden, NordGen and SLU (C). The arrows to the heatmap (B) denotes the clusters corresponding to the subpopulations (majority of grey individuals in each biological grouping) proposed by STRUCUTRE