Viewing post #897541 by sooby

Natalie said:
Dennis, I'll be very surprised if you get viable seeds from the cross between Vitamin C and the fulva (aka ditch lily). The ditch lily is a diploid, and Vitamin C is a tet.

The ditch lily is Hemerocallis fulva 'Europa', which is a triploid. The AHS database gives it, and several other triploids, as diploid for some reason, which ATP has copied, not unreasonably. I see the ATP database actually has two different entries for it:
Ditch Lily (Hemerocallis fulva)
and this one, which also has it erroneously listed as diploid:
Daylily (Hemerocallis 'Europa')

That said, while triploid 'Europa' is the "ditch lily" there are other forms of Hemerocallis fulva grown in gardens that collect daylily species and which are diploid.

That doesn't make much difference to the possible result of a "ditch lily" cross, though. To quote Maurice from another thread:

admmad said:
Although triploids are considered to be sterile most are not 100.0% sterile if enough pollinations are tried (hundreds to thousands). In daylilies triploids tend to be slightly more fertile in crosses with tetraploids but they can also have low fertility with diploids. By making large numbers of pollinations between triploids and diploids it should be possible to produce some viable seeds - probably producing some diploid seedlings. Researchers call this a triploid bridge because it can move genetic characteristics from diploid to tetraploid forms of species in natural conditions.

The quote is from this thread:
The thread "Converting Tetraploids to Diploids - Is There a Process?" in Daylilies forum