Fig. 1
Analysis of linkage disequilibrium decay in two subgenomes and the population structure and relative kinships of 192 rapeseed accessions. a Log probability data (LnP(D)) with clusters (K) from 1 to 10 in the STRUCTURE run. b ΔK based on the rate of change of LnP(D) between successive K as described by Evanno et al. [28]. c Population structure based on K = 4. Red, green, blue and yellow represent sub-population P1, P2, P3, and P4, respectively. Y-axis indicates the composition values belonging to the four sub-populations for a given accession. Each accession is represented by a vertical bar, which is partitioned into colored segments in proportion to the membership in the four sub-populations. d Distribution of pairwise kinship in a natural population (192 rapeseed accessions). Only kinship values ranging from 0 to 0.5 are shown. e Linkage disequilibrium decay determined by squared correlations of allele frequencies (r2) against distance between polymorphic sites in the A subgenome (the dotted line) and C subgenome (the solid line)