Questions about RoKSN and RoKSN genotyping

[SeasideRooftop]

Hi Mingwei,
I can’t help with your first questions, but last year I asked basically the same question as your question 4, and you might find some info in that thread:

Best rugosas for juvenile bloom?

Hi everyone, Call me impatient but I would like to use rugosas that offer a decent percentage of juvenile blooming seedlings. I added Will Alderman early this year, since I had read on this forum that he does have the genes for it. He’s still new so there were relatively few flowers to work with this spring, but a few took. I can also say from my experiments last year that Jean de Luxembourg gave me 3/4 juvenile bloomers, but that one barely counts as a rugosa (at least in appearance, parenta…