For daidzin, 5 QTLs were distributed on 4 linkage groups, including chromosome 2 (D1b), chromosome 6 (C2), chromosome 8 (A2) and chromosome 16 (J). Six QTLs related to glycitin content were located on chromosome 2 (D1b), chromosome 3 (N), chromosome 7 (M), chromosome 11 (B1), chromosome 16 (J) and chromosome 17 (D2). Seven QTLs related to genistin content were detected on chromosome 8 (A2), chromosome 9 (K), chromosome 11 (B1), chromosome 14 (B2) and chromosome 19 (L). Four QTLs related to the total amount of isoflavones were found on chromosome 3 (N), chromosome 9 (K), chromosome 11(B1) and chromosome 19 (L). The location of all QTLs for soybean isoflavones detected is shown in Figure 3.