Search found 1354 matches

by Karl K
Wed Nov 25, 2020 9:30 am
Forum: Rose Hybridizers Association Forum
Topic: Apples and Oranges
Replies: 30
Views: 2444

Re: Apples and Oranges

It is possible that Rosa foetida did contribute in a useful way with a trait I've been calling "dominant non-red". At the Heritage Rose Garden in San Jose, CA, I saw an alleged "Harison's Yellow' developing a red flush following a heatwave. This occurred in June 2003 and again in June 2006. http://b...
by Karl K
Mon Nov 23, 2020 7:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Apples and Oranges
Replies: 30
Views: 2444

Re: Apples and Oranges

It may be that Rosa foetida is not the only species that contributed to the lilac color of 'Grey Pearl', 'Sterling Silver' and so one. I've been reading about the colors and color patterns of sweet peas. A strain called 'Blue Shift' caught my attention because the blooms start out a purply pink then...
by Karl K
Thu Nov 12, 2020 10:31 pm
Forum: Rose Hybridizers Association Forum
Topic: Splash and Dash equals Bad Technique?
Replies: 36
Views: 1186

Re: Splash and Dash equals Bad Technique?

There are a couple of techniques that might help encourage flowering and hip set. These are Binding and Ringing. Binding involves nothing more than wrapping a strong string or twine around a cane and tie it tight enough to impede the downward movement of carbohydrates, protein and such, while not bl...
by Karl K
Tue Nov 10, 2020 11:55 am
Forum: Rose Hybridizers Association Forum
Topic: Memory stress test
Replies: 7
Views: 340

Re: Memory stress test

Some of the "geneticists" (or fruitfly breeders) seemed to consider organisms to be collections of traits. They held a static view of the subjects, mostly ignoring the developmental processes that made a completed plant or animal from a fertilized egg. This developmental program is too easily ignore...
by Karl K
Tue Nov 10, 2020 11:34 am
Forum: Rose Hybridizers Association Forum
Topic: Memory stress test
Replies: 7
Views: 340

Re: Memory stress test

Researchers Surprised After They Graft Tomato Plants With Epigenetically-Modified Rootstock It might be time to re-examine some facts that were already established in the early 19th century. For instance, William Prince, the once-famous nurseryman of Long Island, NY, reported (1832) an important ob...
by Karl K
Mon Nov 09, 2020 12:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Splash and Dash equals Bad Technique?
Replies: 36
Views: 1186

Re: Splash and Dash equals Bad Technique?

There is not much you can do if the pollen triggers an SI mechanism. I have read of a few techniques to defeat the self-incompatibility trap, but only one seems applicable to roses: stylar amputation. The SI rejection mechanism apparently works in the style. Remove the style and the problem is solv...
by Karl K
Sat Nov 07, 2020 2:10 pm
Forum: Rose Hybridizers Association Forum
Topic: Splash and Dash equals Bad Technique?
Replies: 36
Views: 1186

Re: Splash and Dash equals Bad Technique?

Exactly! I couldn't learn much about blackspot resistance in the years I spent studying roses at the San Jose Heritage, though I did learn something about mildew. I hadn't even noticed until someone directed my attention to the China-Teas (or are they Tea-Chinas? The flowers are smallish, like China...
by Karl K
Sat Nov 07, 2020 12:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Splash and Dash equals Bad Technique?
Replies: 36
Views: 1186

Re: Splash and Dash equals Bad Technique?

I remember the story of Lammerts' blackspot resistant line of roses. He thought he had the problem licked. Then he moved from Livermore to the Watsonville area. His best, most resistant cultivars got the Spots. And I may note that 'New Dawn' is usually pretty clean. But it does get a furry coat of m...
by Karl K
Thu Nov 05, 2020 1:31 pm
Forum: Rose Hybridizers Association Forum
Topic: Best Rootstock for Grafting/Budding
Replies: 1
Views: 287

Re: Best Rootstock for Grafting/Budding

I don't do any grafting, but I do collect reports from those who do.

Here's a bibliography that may help pick the right stock for various types of soil and climate.

http://bulbnrose.x10.mx/Roses/breeding/RootsSoil.html
by Karl K
Mon Oct 26, 2020 6:53 pm
Forum: Rose Hybridizers Association Forum
Topic: Memory stress test
Replies: 7
Views: 340

Re: Memory stress test

I forgot to add a link to my bibliography on the subject. http://bulbnrose.x10.mx/KKing/Acquired.html Graft transmission is related, but I have a separate bibliography for it. http://bulbnrose.x10.mx/KKing/StockScion.html And a bibliography of Epigenetics and related matters. http://bulbnrose.x10.mx...
by Karl K
Mon Oct 26, 2020 4:17 pm
Forum: Rose Hybridizers Association Forum
Topic: Memory stress test
Replies: 7
Views: 340

Re: Memory stress test

Or should I say Stress Memory Test? Researchers Surprised After They Graft Tomato Plants With Epigenetically-Modified Rootstock https://scitechdaily.com/researchers-surprised-after-they-graft-tomato-plants-with-epigenetically-modified-rootstock/ At first read this article seemed like a flashback to...
by Karl K
Sun Oct 25, 2020 12:24 am
Forum: Rose Hybridizers Association Forum
Topic: "Outbox" vs "Sent"
Replies: 6
Views: 356

Re: "Outbox" vs "Sent"

That's how I see it . Outbox = to go out. Sent = already gone.
by Karl K
Wed Oct 14, 2020 7:11 pm
Forum: Rose Hybridizers Association Forum
Topic: Need help finding giant rose blooms
Replies: 2
Views: 304

Re: Need help finding giant rose blooms

I don't have one, but I know how someone could breed some. 'Schoener's Nutkana' is a tall plant with single pink flowers. Not terribly impressive, but it has been the progenitor of giants. Leonard Barron (HT) [Schoener's Nutkana x Souv de Madame Boullet] Average diameter 7 inches. This variety has p...
by Karl K
Tue Sep 22, 2020 12:33 pm
Forum: Rose Hybridizers Association Forum
Topic: Sport?
Replies: 5
Views: 483

Re: Sport?

'Betsy Taaffe' and 'Jean Galbraith' might enjoy a new playmate. Mixing color variants of otherwise similar plants can give pleasing effects in the border or garden.
by Karl K
Sat Aug 15, 2020 9:41 am
Forum: Rose Hybridizers Association Forum
Topic: full Ph.D. thesis "ASSESSMENT OF GENETIC VARIABILITY AND DEVELOPMENT OF HYBRIDS IN ROSA SPECIES"
Replies: 3
Views: 526

Re: full Ph.D. thesis "ASSESSMENT OF GENETIC VARIABILITY AND DEVELOPMENT OF HYBRIDS IN ROSA SPECIES"

'Radiance' is another example. Unlike many other varieties, it refused to degenerate despite mass propagation. I dont know its northern limit, but it reported does about as well in Florida as anywhere else. I saw it in Kentucky looking just the same as it does in California. It grows on its own root...
by Karl K
Sat Aug 15, 2020 12:25 am
Forum: Rose Hybridizers Association Forum
Topic: full Ph.D. thesis "ASSESSMENT OF GENETIC VARIABILITY AND DEVELOPMENT OF HYBRIDS IN ROSA SPECIES"
Replies: 3
Views: 526

Re: full Ph.D. thesis "ASSESSMENT OF GENETIC VARIABILITY AND DEVELOPMENT OF HYBRIDS IN ROSA SPECIES"

I recently got around to organizing some articles that I collected 10 to 15 years ago about genetic polymorphism. This is a broad subject, with several interesting facets. One aspect in particular is that populations that are subject to varying environments retain more variations of various genes th...
by Karl K
Wed Jul 29, 2020 12:56 pm
Forum: Rose Hybridizers Association Forum
Topic: First known yellow rose
Replies: 32
Views: 3861

Re: First known yellow rose

It is often difficult to be sure that an old rose in commerce is the real deal. But throwing caution to the wind, one might try 'Anna-Maria de Montravel' as a parent. It is white, but apparently had a yellow(ish) Tea or Tea-Noisette as a grandparent. At any rate, when crossed with the yellow Tea, 'S...
by Karl K
Wed Jul 29, 2020 11:41 am
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 20
Views: 3369

Re: Rebloomers genes

Karl, have you ever seen or found a breeding paper article - written and published, in first person by Robert Simonet (Edmonton Alberta)? .... lots of second, third and handwritten but was interested in 1st person published. Checked alphabetically but did not recognize any in archives or missed it ...