Everyone who hybridizes daylilies and is interested in the parentage of registered daylilies should be aware that there are errors in the recorded parentage and errors in the ploidy (diploid/triploid/tetraploid) of registered daylilies.
The errors may have several different causes but one of them is that daylily hybridizers do not use what have been called "safe" hybridizing techniques. That is, most simply assume that there are no natural pollinations and only their hand pollinations work.
A rough estimate of the number of errors in parentage, based on the errors in ploidy was 6%. A more recent study found 16% errors in parentage also based on errors in ploidy.
Errors in ploidy will only capture some errors in parentage. I would expect that errors in ploidy would significantly under estimate true errors in parentage.
