Yes, significant means p-value. In the supplementary tables, expanded form of DFF is given as suggested. Treatments refers to introgression lines and check to control. For uniformity, we have changed the terminology to treatment instead of using IL or variety and check to control in all the revised supplementary tables and rephrased the legends accordingly.
Please add some gel pictures of the foreground selection markers you used in order to visualize the genotyping results and showed the polymorphism of these markers on gel.