Fig. 1
From: Low genetic variation is associated with low mutation rate in the giant duckweed
Nucleotide diversity, population structure and linkage disequilibrium in S. polyrhiza. a Geographic distribution of the 68 sequenced samples, colored according to population structure. The insert at the lower left corner shows the results from the STRUCTURE analysis using genome-wide polymorphisms. Each colored line refers to an individual and the Y-axis refers to the likelihood of membership to each cluster. Genome wide πs refers to average pairwise nucleotide diversity at synonymous sites. SE: Southeast. b Principal coordinate analysis (PCA) based on genome-wide nucleotide diversity data. Average pairwise nucleotide diversity (π) calculated from all sites is shown for each population. c Decay of linkage disequilibrium (LD) with physical distance in four populations. The dashed line indicates an LD value of r2 = 0.33. Data are deposited in figshare58
