Viewing post #1020791 by admmad

RobLaffin said:Thanks very much, Maurice. No, you hadn't answered previously, but I figured I had just worn out my welcome with so many questions. I was therefore happily surprised to see your thoughtful and detailed response. I think I understand all you've said, although my nonscientific brain may take a while to fully digest it all.

I apologize for not replying sooner. I don't know why that happened. I may have formulated an answer in a text editor and then been called away from the computer before posting it. When I returned I may have assumed it was posted and not checked. I don't know or remember but no, you had not worn out your welcome.

So, when you say (I have yet to figure out how to make the block quotes everyone else uses):

I think you may want to try placing [ and the word quote and then ] at the start of the quote and then [/ and the word quote and then ] at the end of the quote.

admmad said:That means that a cross of cultivar A x cultivar B may suggest that cultivar A is pod sterile (because it is known that cultivar B is male fertile from other crosses) but in fact the cross of cultivar A x cultivar C succeeds indicating that cultivar A is not pod sterile. Actually the cross of cultivar B x cultivar A may succeed. That is because in the cross of A x B it is the A female identifiers that are combined with the male B identifiers but in the cross of B x A it is the B female identifiers that are combined with the A male identifiers.

roblaffin said:what that means is, in the original cross of cultivar A x cultivar B, when that fails, it does not necessarily mean cultivar A is pod infertile; it could just as well mean that the female identifier of cultivar A and the male identifier of cultivar B are so similar [identical?] that cultivar A's incompatibility system rejected the cross. But cultivar B x cultivar A might work because then it's cultivar B's female identifier checking against cultivar A's male identifier and those are not necessarily a match even though A's female and B's male were, so the cross is allowed?

Yes that is correct. It is not known whether the male and female identifiers in daylilies need to be identical for the cross to fail.

But in the scenario you describe, even if it were two large flowered UFs being crossed, doing the cross 'backwards' might work if the apparent pod infertility were actually just an incompatibility issue between identifiers in one direction.

Yes that is correct.

As always, thanks very much for your in depth explanation in a way I can understand.

You are welcome.