Population structure of 7 cattle populations using: (A) model-based STRUCTURE program (Pritchard et al. 2000) and (B) BAPS program (Tang et al. 2009). Each animal is represented by a single vertical line divided into K colours, where K is the number of clusters assumed. The coloured segment shows the individual's estimated proportion of membership (averaged across 10 runs at K = 6) in that cluster for the STRUCTURE program and indicates the average probability of assignment to the "correct" cluster for the BAPS program. Black lines separate the populations labelled above the figure. The labels above the figure indicate the number of animals analysed in each breed and the names of the cattle populations analysed are indicated below the figure.