Australis said:I, too, am interested in this discussion and would like to know if such interdivisional crosses are easier at the 4N level. I am not aware of any tetraploid OA hybrids, but there are some tetraploid LOs, LTs, LAs and OTs I know of:
I've been compiling a list of known ploidies here (I also list the source of my information so you can double-check it if you'd like):
Excel: https://docs.google.com/spread...
PDF: https://docs.google.com/spread...
Joshua,
I looked at your file and there are some things in it that aren't consistent with other information I have seen. Some of the items listed as 4N I have seen reference that they are 3N. The other thing to consider is that a number of the OT's out there as 4N are OTTT - Leslie Woodriff for example. A few like Arabesque & Scarlet Delight are OOOT's. My point in mentioning this as it gives some indication as to what might be more likely to set seed on that plant. Also for the LO's & OT's - many of the newer Dutch cultivars are triploids - LLO, LOO, & OOT's. For the OT's I have heard from a number of people they have some fertility and I was able to get some seed from them when crossed with 4N OT's. The most recent NALS yearbook has an article that discusses that using 3N's like this as a pod parent leads to mostly aneuploidy (number of chromosomes is in not increments of 12 but is too few or a few extra) seedlings - some of these seedlings can be fertile but now things get really strange.
Regards,
Patrick
