Schematic diagram of origin and dispersal of domesticated Chinese oak silkworm. The green dot refers to the birthplace of domesticated Chinese oak silkworm, and the green arrows refer to the primary dispersal route.The brown dots show the secondary dispersal centers, and the brown arrows show the secondary dispersal route. The boxed numbers accompanying with the dispersal places represent the years of introduction of the domesticated Chinese oak silkworm based on the historic records. AH, Anhui; CQ, Chongqing; GZ, Guizhou; HB, Hubei; HeN, Henan; HLJ, Heilongjiang; HuN, Hunan; JL, Jilin; LN, Liaoning; NMG, Neimenggu; SD, Shandong; SC, Sichuan; SX, Shanxi; YN, Yunnan; ZJ, Zhejiang. High quality figures are available online.