A comment on this rose on HMF seems to suggest it is a color sport of Double Knock Out (see link and click “member comments”).
If that is correct, I wonder what its disease resistance to BS is compared to the original it sported from.
Does anyone here have any experience growing this variety, or breeding with this variety?
Had Bubble Double kept all the exceptional characteristics of Double Knock Out, we would have added it to the family. Unfortunately like most mutations it has lost something in the process. However it is still a very good rose and its resistance to Black spot is very near its parent. That’s why we introduced it.
Hi Jacques,
I see, thank you for the information.
I don’t think this one is available in Australia.
It looks nice in the pix!
Jacques,
I’ve read several comments about roses you’ve introduced and I appreciate your candor when describing their good and maybe not so good traits.
Rob
Yes, thank you Jacques!!! I really appreciate you and recognize you are truly committed to introducing the best roses possible. It’s great that you care about the rose growing community too and take time to interact with us.
This past spring I was excited when I saw ‘Bubble Double’ roses at the Home Depot as bareroot plants and bought and planted a few for myself and shared several with friends. They developed nicely and were very healthy this year. One thing that I noticed on these plants was that the necks of the blooms seemed a bit longer than Double Knock Out. The way the blooms were borne seemed more expanded and airy because of that. It’ll be interesting to see if that holds true over time. I really liked that trait about it.
David
How often do mutations in a sport actually occur in the reproductive tissue layer? My understanding is that new characteristics evident in a sport, are rarely, if ever, transmissible by sexual reproduction. Can anyone comment on this? Thanks.
Paul
How often do mutations in a sport actually occur in the reproductive tissue layer?
In theory, just as often as they do in a non-reproductive layer. The difference is that when it happens you generally won’t know because the influence of hybridization obfuscates the mutation.
Frequency of germ layer mutations is probably actually much less than what appear as sport mutations. This is because sport mutations are often transposons hopping about chromosomes. Because they are so glaringly evident these transposons have been clonally selected so have an artificially high frequency of occurance in modern roses.
Jacques,
I too appreciate your comments coming from the commercial world. It is nice to hear the pros and cons and the background on roses you provide. Thank you so much.
Paul, I had Climbing Crimson Glory at one time and read all I could on it and recall reading that genetically it behaved like a climber so assumed this was one case where the climbing characteristics were passed on ( Ineed to look up Crimson Glory and see if it had any climbers in its recent background though, LOL)
I have to say I do like the form of this rose much better than the KOs. If it does have good disease resistance I would think it would produce much more interesting seedlings when crossed and hopefully would pass along that resistance. It doesn’t say anything about fragrance though. I know, I want it all, lol.
Some decades ago I planted a lot of seeds from climbing Crimson Glory, which was able to survive against a south wall and bloom most every year, despite our cold winters. I kept the best seedling which is also a climber which is very similar to ClCrGl but less generous of bloom. It still grows out in the hinterlands of the garden and I get about 1 flower per year because it mostly freezes back too far to bloom. Other seedlings were also climbers. so I guess in this instance the sport was transmissible. Of course New Dawn is a classic case of a sport to remontant bloom which transmits that into progeny with reasonable frequency, if the pollen donor is remontant. But most self seedlings are at most once-bloomers and mildew magnets for me.
It seems to be haphazard. See: Orange Velvet.
Same experience as Jim: all climbing sports I tried give a high proportion of climbing seedlings. I did use a lot both ways on a large scale as HT climbing sports behave better against BS than the non climbing original vars. For me it was a not productive enough strategy as seedlings are mostly too big and not better enough at resisting BS.