PCR–AccI analysis showed that all the Wx loci of the
recipients 057(GG), XB(GG), and their hybrid Xieyou
57 [Xieqingzao A(GG) 9 057(GG)] were GG-type
(Fig. 1, Lane1, 2, and 9), while those of the donors
Yanhui 559 and ND42 were TT type (Fig. 1, Lane 4
and 5). Details of GBSS activity in the developing
seeds 10 days after fertilization and AC in the mature
seeds are shown in Table 1. The GG-type samples
consistently exhibited higher AC and stronger GBSS
activity than the TT type samples. Thus, the molecular
marker faithfully reflected the differences in genotype
which determines the difference in enzymatic activity and in the target trait AC. However, the GBSS activity and AC varied to some degree even in the varieties
with same GG or TT genotype (Table 1).