Fig. 5.

Domestication sweeps underlying apple fruit firmness. Distributions of XP-CLR scores and nucleotide diversity (π) in selective regions on chromosomes 6 (a) and 17 (b) in M. domestica from M. sieversii in Kazakhstan (Dom_SieK) and chromosome 12 (c) from M. sylvestris (Dom_syl), which harbor genes known to be associated with fruit firmness. Distributions of XP-CLR scores are shown in top panels with selective sweeps marked with red bars and interesting genes labeled above peaks. Distributions of π are shown in bottom panels with M. domestica in orange lines, and M. sieversii and M. sylvestris in green lines. AE aldose 1-epimerase, CLS cellulose synthase, GG glucan endo-1,3-b-glucosidase, MM endo-beta-1,4-mannase, PE pectinesterase, PG polygalacturonase, PL pectate lyase