Fig. 1.

PCA plot showing the population structure of 1577 sequenced animals of the 1000 Bull Genomes Project Run 5. Different colours and symbols separate the animals by breed. Symbols in black colour represent indicate individuals selected as reference population in scenario S1 (REF in legend); HOL: Holstein; JER: Jersey; AAN: Angus; BSW: Brown Swiss; GUE: Guernsey; MAR: Marchigiana; REN: Norwegian Red; SIM: Simmental; MON: Montbeliarde; NOR: Normandes; UNK: unknown; CHA: Charolais; DBC: Dairy-Beef Crosses; AYF: Finnish Ayrshire; HER: Hereford; STA: Stabilizer; RES: Swedish Red; GVH: Gelbvieh; RED: Danish Red; BCO:Beef Composites; BBR: Beef Booster; LIM: Limousin; PIE: Piedmontese; SAL: Salers; BCR: Beef Crosses; ERI: Eringer; GLW: Galloway; ROM: Romagnola; SCO: Scottish Highland; TGR: Tyrolean Grey; HIN: Hinterwalder; ANG: Angler; VOR: Vorderwalder; BELB: Belgian Blue