Fig. 2

Synteny of walnut physical maps with the grape (a), poplar (b), apple (c), Medicago truncatula (d), cucumber (e), and strawberry (f) pseudomolecules. The 16 walnut physical maps are arranged as 8 pairs of homoeologues. Each physical map starts (0.0 Mb) at the top. The color code for pseudomolecules is shown at the right side of each panel. The regions devoid of synteny are white and labeled as a 0 pseudomolecule in the color code. Only the primary SBs are shown in the Jr-Vv (a) and Jr-Fv (f) genome comparison for the sake of clarity. In the remaining comparisons both the primary and secondary SBs (for definition see Methods) are shown as two tracks. Their placement into the left or right track is arbitrary