Fig. 2

Unrooted phylogenetic tree of the Capsicum germplasm. The dendrogram was produced using the unweighted neighbor-joining method based on genetic dissimilarity among the 3,821 germplasm accessions. The colors of branches indicate accessions corresponding to the clusters (cluster 1 to 10) from population structure analysis as in Fig. 1. Five clades (a-e) were distinguished by distance between branches; a and b included C. annuum species mostly from Europe; c and d included C. annuum species mostly from Asia; e comprised other Capsicum species except C. annuum. a to e were used for a clustering range to select entries to construct the core collection