Extended Data Fig. 7: Distribution of sequence identity differences between the two wild tetraploid species and hexaploid sweetpotato.

For each analyzed phased genomic window, the sequence identity difference was calculated as: the mean sequence identity between ten I. aequatoriensis accessions and the hexaploid sweetpotato ‘Tanzania’ minus the mean sequence identity between eight I. batatas 4× accessions and the hexaploid sweetpotato ‘Tanzania’. The two peaks of the identity difference distribution are labeled by the orange and green lines in the top panel. Normal distributions were fitted to the patterns displayed by ‘Tanzania’ genomic windows with higher sequence identity to I. batatas 4× (middle) and those with higher identity to I. aequatoriensis (bottom). The 95% confidence intervals are indicated by the blue dotted lines.