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The red broken line indicates that genes are under positive selection (more than one) or negative selection (less than one). The short species names are P . patens (Pp), S . moellendorffii (Sm), A . trichopoda (Am), S. bicolor (Sb), O. sativa (Os), S . lycopersicum (Sl), V. vinifera (Vv), P . trichocarpa (Pt), C. papaya (Cp) and A. thaliana (At). The Ka and Ks values were computed using the PAML program.
