PCA projection on PC1 and PC2 scores of sequencing fragments that cover satellite repeats from the pangenomes of different lines in the three Brachypodium species. The satellite fragments identified from the sequencing reads of different lines within the three Brachypodium genomes were merged, and 500 fragments were randomly selected for each genome. Box plots at the top and right of PCA projection show the overall distribution of PC1 and PC2 scores within each sub/genome group (T -test, ** P < 0.01).
