Figure 4. Distribution of population genetic parameters calculated in 150-kb windows across the different chromosomes of sea bass genome (x refers to LGx, and not to a sexual chromosome).

(a) Chromosomal patterns of nucleotide diversity (π) in the Atlantic (blue) and Mediterranean (red) lineages of D. labrax. (b) Genomic patterns of divergence between D. labrax and D. punctatus measured as the proportion of fixed differences per bp (d_f). (c) Chromosomal patterns of recombination (ρ/kb) in D. labrax, averaged across Atlantic and Mediterranean lineages, alternately coloured in grey and orange across chromosomes. (d) Genomic landscape of differentiation (F_ST) between Atlantic and Mediterranean lineages.