Fig. 2. Biplot of Model 1 of Mixed Model 1 for grain yield. Lines are 129. Sister lines are in bold (5,6), (4,19,20), (14,15), (21,23,24), and (28,29). The 16 sites are MEX, USA1, USA2, TKY, ISR, BGD, IND, PKT, SYR, SPN1, SPN2, NPL, KNY, ZBW, NZL, and CHL.