Fig. 2: Geographic distribution, population structure and genomic diversity of Brassica juncea accessions.
From: Genomic insights into the origin, domestication and diversification of Brassica juncea
a, Geographic distributions of 480 B. juncea accessions. The geographic map was drawn using R ggplot2. b, The maximum-likelihood phylogeny of 390 B. juncea accessions with over 60% genetic components to the group and model-based clustering with K from 2 to 6. The five other Brassicaceae species used to root the phylogenetic tree are shown as a single branch. Branch colors indicate different groups based on the population structure. Scale bars, 5 cm for G1 and G5; 5 mm for G2, G3, G4 and G6. c, PCA plots showing three divergent clades of 390 B. juncea accessions. d, Nucleotide diversity (π), population divergence (FST) and genetic distance (D) across the six groups. The value in each circle represents a measure of nucleotide diversity for each group; values in red on each line indicate pairwise population divergence between groups, while values in black on each line indicate pairwise genetic distances among groups. e, Group-specific LD decay plots.
