Fig. 1
From: Rapid functional divergence after small-scale gene duplication in grasses
SSD-derived grass duplicate genes ascertained for our analysis. Numbers of SSD-derived duplicate gene pairs that arose along the B. distachyon (blue and orange stars), O. sativa japonica (green and orange stars), and S. bicolor (purple stars) lineages at specified divergence times on the monocot phylogeny. Outgroups used to polarize duplication events were Musa acuminata, Arabidopsis thaliana, Carica papaya, Populus trichocarpa, Vitis vinifera, Solanum lycopersicum, Physcomitrella patens, Ostreococcus lucimarinus, and Chlamydomonas reinhardtii (see Additional file 2: Figure S1 for full phylogeny)