After the opportunity for me to buy cheaply 18 back issues (1985-) of the NALS yearbook arose a few years ago, and seeing the great work that included technical writing, I joined NALS just last year.(Okay, you can stop the laughing, finger pointing, spitwads and other gestures of shaming.... whew, at least it's not cold enough for snowballs...)
To the point, I received lily seed in my initial packet, and they were tetra orientals from Robert Griesbach. I'm surprised you hadn't heard about them, Tracey. I don't know how the first gene doublings (2n to 4n) were made, via cochicine, oryzalin, or what, but I would have been surprised if the work had not already been done. Some breeder (and not necessarily with
Lilium) prefer to stay with 2n, or whatever the natural ploidy is for the species/genus. It took Ed McRae years to realize the potential of tetraploids.
Um, a bit of a ramble, but oh well.