Fig. 2

Maximum-likelihood admixture graph of rice. The wild rice population was divided into four subpopulations (Oryza rufipogon (OrI and OrII), Oryza nivara (On) and Oryza barthii (Ob)). The abbreviations for the major domesticated rice subgroups are deepwater rice (DW), irrigated indica rice (IR-XI), irrigated japonica rice (IR-GJ), rainfed lowland indica (RL-XI), rainfed lowland japonica (RL-GJ), tidal wetland rice (TW), swamp rice (SW), upland indica rice (UP-XI) and upland japonica rice (UP-GJ). African wild rice, Oryza barthii (Ob), was used to root the tree. The bootstrap values on the tree are based on 10,000 replicates. Arrows on the graph represent admixture events among different rice populations. The scale bar shows ten times the average standard error of the entries in the sample covariance matrix