Davis et al. [46] noticed the evident diminution of
genome size by 12% to 16% in two octoploid cultivars
as compared with an expectation of four times the size
of a diploid genome. This diminished size could be due
to events, such as losses of DNA segments, that
occurred during or after the origination of the octoploids
[46]. The marked loss of rDNA sites in octoploids
could have been a part of a broader, generalized loss of
DNA segments, or could have occurred via a separate
and distinct mechanism.