Fig. 4

Estimate of genetic diversity in a sub-population of 191 C. annuum accessions using 32,950 SNP markers. a Bar-plot describing the population structure estimated by the Bayesian clustering. Each individual is represented by a thin horizontal line, which is partitioned into K coloured segments whose length is proportional to the estimated membership coefficient (q). The population was divided into three (K = 3) groups according to the most informative K value (see Additional file 2: Figure S8). Dashed black lines separate individuals in different clusters. b Dendrogram plot derived from the non-parametric clustering. D² indicates the allele sharing distance. The population was divided into two (K = 2) groups according to the most informative K value (see Additional file 2: Figure S9). Black continuous lines separate individuals of different sub-populations