Expression patterns of differentially expressed genes in domestic versus wild silkworms. (A) Expression levels of the differentially expressed genes (DEGs) in four silkworm strains. (B) Tissue expression patterns of the DEGs in different larvae tissues based on microarray data . Twenty-one of the 32 DEGs in domestic versus wild silkworms had probes in the microarray data (Table 3). Hierarchical clustering was performed using Cluster software (http://genome-www.stanford.edu/clustering/) with the average linkage method. F: female; M: male. A/MSG: anterior/median silk gland; PSG: posterior silk gland.