Gradual polyploid genome evolution revealed by pan-genomic analysis of Brachypodium hybridum and its diploid progenitors.

We did observe large numbers of SNVs and small indels in the D-plastotype D subgenomes and a lesser, but highly significant, amount of polymorphism in the S-plastotype D subgenomes with respect to the B. distachyon reference genome (Fig. 8 ); based on k-mer distribution, we also found evidence for the movement of TEs between the D and S subgenomes in the old polyploids (Fig. 6b ).

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