Search found 1857 matches

by Don
Fri Mar 27, 2020 11:03 pm
Forum: Rose Hybridizers Association Forum
Topic: silver nanoparticles use in vitro culture
Replies: 5
Views: 147

Re: silver nanoparticles use in vitro culture

Hmmm. That paper apparently describes an in-vitro propagation method for roses. There are not many of those.
by Don
Mon Mar 16, 2020 9:14 am
Forum: Rose Hybridizers Association Forum
Topic: Strat Question
Replies: 6
Views: 144

Re: Strat Question

>> Generally it seems that simply storing fresh hips in a refrigerator is not enough to make them think they have been stratified. Stratification and germination seem to require different temperature regimes. One thing to try is to raise the temperature to between 48 and 54 degrees F and hold it the...
by Don
Mon Mar 16, 2020 9:09 am
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 12
Views: 383

Re: Unique black spot resistance gene from 'George Vancouver' is better characterized

So, how exactly can we amateur breeders capitalize on this news, David? Obviously we can use the cultivars you lists as having RDR3 as breeders and try to combine them with roses that have the other types of resistance but I'm not able to tell from the abstract which other cultivars those might be. ...
by Don
Mon Mar 09, 2020 4:05 pm
Forum: Rose Hybridizers Association Forum
Topic: Apples and Oranges
Replies: 28
Views: 663

Re: Apples and Oranges

I think that Morning Mist is a cross between Lavender Pinocchio and some one of the work horse florist roses from the 60's like Tiffany. In fact I think Tiffany is a good candidate based on scent and morphology. I wonder if anyone at Meilland or Suntory has figured it out yet based on genetics. Shou...
by Don
Sun Mar 08, 2020 8:12 pm
Forum: Rose Hybridizers Association Forum
Topic: Apples and Oranges
Replies: 28
Views: 663

Re: Apples and Oranges

The number of available cultivars are quickly diminishing such that I doubt it would even be possible to assemble a stable having dozens of red/yellow bicolors.
by Don
Sun Mar 08, 2020 3:34 pm
Forum: Rose Hybridizers Association Forum
Topic: Apples and Oranges
Replies: 28
Views: 663

Re: Apples and Oranges

I guess I shouldn't be surprised that the quaint musings on pigmentation of breeders like Moore, LeGrice, Lammerts, Marshall and others would continue to be seriously discussed in the century after they lived and died. The actual science of the matter is largely inaccessible to the layman even today...
by Don
Wed Feb 19, 2020 9:17 am
Forum: Rose Hybridizers Association Forum
Topic: purple stamens
Replies: 18
Views: 637

Re: purple stamens

Purple is not the only color that anthers can be besides yellow. This is a picture of Rob Rippeto's GOLDAXDORHOR, a hybrid bracteata seedling that I tried breeding with for several years. I regret not having any offspring that survived the winters in New England which was the fate also of mama. Rob2...
by Don
Tue Feb 18, 2020 8:27 pm
Forum: Rose Hybridizers Association Forum
Topic: purple stamens
Replies: 18
Views: 637

Re: purple stamens

I saw Bayses Purple a number of years ago in the outside patio garden at the US Botanical Garden. The stamens were strikingly purple.

https://www.helpmefind.com/rose/l.php?l=2.542
by Don
Mon Feb 17, 2020 8:39 am
Forum: Rose Hybridizers Association Forum
Topic: Coutts #4
Replies: 11
Views: 608

Re: Coutts #4

I think it matters little or not at all what we call them, Larry, except maybe to us when we post about them to the extent that the label facilitates search engines. What matters more is what Kim wrote about in another recent post which is what they are presented as in commerce. Perhaps the most fam...
by Don
Sun Feb 16, 2020 2:36 pm
Forum: Rose Hybridizers Association Forum
Topic: Coutts #4
Replies: 11
Views: 608

Re: Coutts #4

"Now there is much wishful thinking that all that is necessary to improve the rose is to return to the old roses or the species, make a few crosses and introduce some of their ("blood") genes into our garden beauties. If that were all that was required the task would be easy. Unfortunately, this sim...
by Don
Fri Jan 31, 2020 7:50 pm
Forum: Rose Hybridizers Association Forum
Topic: Help identifying this rose
Replies: 11
Views: 362

Re: Help identifying this rose

My guess is Baby Love.
by Don
Wed Jan 29, 2020 12:23 pm
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 31
Views: 1564

Re: Petite Knock Out Rose - AVOID

Thanks Kim, fixed the link. It is the one Stephan found, above.
by Don
Wed Jan 29, 2020 9:55 am
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 31
Views: 1564

Re: Petite Knock Out Rose - AVOID

So it appears that there are two patents for Petite Knock Out® Rose MEIBENBINO, to consider. The first has been awarded and is a standard plant patent so is pretty non-controversial. The second is a utility patent which is unusual for a plant and has elements that, I believe, deserve scrutiny. Befor...
by Don
Tue Jan 28, 2020 9:54 pm
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 31
Views: 1564

Re: Petite Knock Out Rose - AVOID

Has anybody seen the patent?
by Don
Mon Jan 27, 2020 11:17 am
Forum: Rose Hybridizers Association Forum
Topic: Worms eating seeds
Replies: 15
Views: 394

Re: Worms eating seeds

Wasp larvae are segmented looking like the bellows on an accordion. These guys are smooth.
by Don
Tue Jan 21, 2020 9:44 am
Forum: Rose Hybridizers Association Forum
Topic: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?
Replies: 12
Views: 492

Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

Stephan, thanks for the link. I'll take a ride to Elizabeth Park in the spring to check things out. It's not the first time RRD has been noted there. Back in the 1980's several batches of infected plants got into the mix and in those days we really didn't know much about it so nothing was done to mi...
by Don
Mon Jan 20, 2020 10:06 pm
Forum: Rose Hybridizers Association Forum
Topic: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?
Replies: 12
Views: 492

Re: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?

>> Although 'Patricia Macoun' was bred a long time ago and surely was grown a bit more widely in some northern states at one time, I've never seen it in a garden I have. At Elizabeth Park in Hartford, Connecticut there is small 'test garden' across the road from the main rose garden. It is/was fence...
by Don
Thu Jan 16, 2020 1:19 pm
Forum: Rose Hybridizers Association Forum
Topic: What is the easiest and hardest steps in rose breeding?
Replies: 29
Views: 580

Re: What is the easiest and hardest steps in rose breeding?

>> Brock (1954) succeeded in crossing pear x apple and raising the hybrids.

Brock 1954 svp?