Fig. 1

a Geographical distribution of the eight Iberian native breeds (maps from https://commons.wikimedia.org/). b Population structure plot determined by NGSadmix shows consistency with breed denomination; each individual is represented by a stacked column of the 2, 5 and 8 proportions (other K values in Fig. S2). c Reproductive isolation of the Mirandesa and Brava breeds relative to the others is clear in the principal component analysis done with PCAngsd; variance explained by each component is shown in parenthesis (other components are in Fig. S3). Colors denote breed names