Genetic structure of South African Nguni (Zulu) sheep populations reveals admixture with exotic breeds
Assignment of individuals to 9 clusters based on DAPC analyses (a). Scatterplot of the first two principal components of DAPC using populations as a posteriori clusters (b). In Fig 4B, the individuals are assigned to populations a posteriori, that is, after determining the number of clusters by the programme, instead of forcing them into known populations. Populations are labeled inside their 95% inertia ellipses and dots represent individuals. The inset indicates the eigenvalues of the first four principal components and the variance explained by the PCA.