Fig. 3From: Integrative analysis of histomorphology, transcriptome and whole genome resequencing identified DIO2 gene as a crucial gene for the protuberant knob located on forehead in geeseTranscriptomic analysis of both skin and bone located in knob between knob- and non-knob geese. AÂ Principal component analysis of the knob skin and bone samples. BÂ The number of differentially expressed genes (DEGs) in the knob skin and bone between knob- and non-knob geese, respectively. CÂ Functional enrichment of DEGs in the knob skin and bone between knob- and non-knob geese, respectively. DÂ The enrichment pathways in the knob skin were intersected with these in the knob bone. WP, skin located on knob in Sichuan White goose; SP, skin located on knob in Lion head goose; LP, skin located on knob in Landes goose; WG, bone located in knob in Sichuan White goose; SG, bone located in knob in Lion head goose; LG, bone located in knob in Landes goose. W and S represented the knob group, L represented the non-knob groupBack to article page