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.
On Supplementary table S2, does significant mean p-value? Indicate DFF = days to fifty percent flowering. What is the “treatment”? What do the results on “check” mean? How did you analyze “control vs IL”?