Distribution of pairwise molecular coancestry estimates and linkage disequilibrium decay. (a) Global pairwise molecular coancestry estimates of the 407 flax accessions of the core collection. Only kinship values ranging from 0 to 0.5 are shown. (b) Scatter plot of LD decay (r2) against the genetic distances (cM) for pairs of linked SSRs across the 15 linkage groups. The inner panel shows a detailed view of LD decay for markers located within 5 cM. The decay curves were plotted according to Breseghello and Sorells . The blue line represents the threshold level of significance (r2 = 0.1). The red line represents the average genome-wide LD of linked markers. (c) Pairwise molecular coancestry estimates  within each of the six sub-groups. The diagonal values correspond to the intra sub-group molecular coancestry. (d) Average genome-wide LD decay curves for linked markers within each of the six sub-groups.