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Figure 3—figure supplement 1. (A) Snapshots of a resynchronization simulation. Color scale as in Figure 2A, also in (D) and (F). The black dotted vertical line indicates the position of the anterior end of the PSM xa = 0. Tissue parameters are constant over time. See also Figure 3?video 1. (B-F) Analysis of local phase order and vortex transport in the simulation shown in (A). (B) Kymograph of local phase order parameter of the right PSM shown in (A). (C) Kymographs of phase vorticity for (left) clockwise and (right) counter clockwise rotations. The phase patterns within the black and yellow boxed space-time domains in (B) and (C) are shown in (D). (D) Snapshots of a phase vortex. The yellow arrows indicate the direction of rotation. (E) Local phase order parameters along the anterior-posterior axis of the PSM at different time points. (F) Time series of local phase order parameter at the anterior end of the right PSM xa. The horizontal broken line indicates the threshold Zc = 0.85 for determining normal and defective segments in simulations. The resultant stripe pattern is on top. In (A), (B) and (F), the blue and green triangles mark FRS and PLD, respectively. Red bracket in (F) highlights a segmental defect resulting from vortex in (D). Parameter values for simulations are listed in Supplementary file 1. (G), (H) Defect size distributions for (G) simulation (n = 800) and (H) embryonic experimental data (n = 134). Defect size indicates how many consecutive segment boundaries are defective in between FRS and PLD. In (G) and (H), the data for different washout timing shown in Figure 4 and Figure 1?figure supplement 1 were pooled to make the histograms. The defect size distribution for each washout timing is shown in Figure 3?figure supplement 3.