Figure 2a. PCR products obtained using #4F/#4R primers. Lanes 1 to 6 are breeding lines/cultivars 1-N4AT4B, 2-N7AT7B, 3-N7BT7D, 4-N7DT7B, 5-Reeves, 6-Eradu and M: 100-pb ladder (Promega), 500-bp fragment is indicated. Capital letters "D", "A" and "B" indicate PCR fragments from Wx-D1a, Wx-A1a and Wx-B1a alleles.