Search found 1340 matches

by Karl K
Tue Sep 22, 2020 12:33 pm
Forum: Rose Hybridizers Association Forum
Topic: Sport?
Replies: 5
Views: 149

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: 315

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: 315

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: 3281

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: 2916

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 ...
by Karl K
Sat Jul 25, 2020 1:20 am
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 20
Views: 2916

Re: Rebloomers genes

Calocarpa was raised from a Russian rugosa. Prof. Budd (1906) made an interesting comment on his experiences: "The work of crossing the Russian R. rugosa began at the Iowa Agricultural College in June, 1892. The pollen of over a dozen of the best garden varieties was used, but that of General Jacque...
by Karl K
Thu Jul 23, 2020 4:47 pm
Forum: Rose Hybridizers Association Forum
Topic: Video tour including Metis and Bella Nitida
Replies: 9
Views: 1273

Re: Video tour including Metis and Bella Nitida

'Reine des Violettes' seems to be another of the co-pigment types. Of the very few offspring listed in HMF, the only one that was of the "blue" persuasion was 'Mme E. Rocque' [Veilchenblau x Reine des Violettes]. Two co-pigmented parents produced a co-pigmented child (once-blooming). LeGrice's 'News...
by Karl K
Thu Jul 23, 2020 12:13 am
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 20
Views: 2916

Re: Rebloomers genes

That is an interesting paper, but the authors neglected a couple of other types of late bloom. Some climbers exhibit "repeat bloom". After they bloom, another shoot may arise on the same branchlet (spur?) that produced the first. And another. And another. I once had a Paul's Scarlet Climber that gav...
by Karl K
Wed Jul 22, 2020 11:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Video tour including Metis and Bella Nitida
Replies: 9
Views: 1273

Re: Video tour including Metis and Bella Nitida

Looking over my notes on Tuscany I found this one from Paul Barden that is interesting. "As much as I like 'Tuscany Superb', you will struggle to get anything very dark in color from it; the second you mate it with anything modern (to get remontancy genes started) you almost always end up with medi...
by Karl K
Fri Jul 17, 2020 11:53 am
Forum: Rose Hybridizers Association Forum
Topic: First known yellow rose
Replies: 32
Views: 3281

Re: First known yellow rose

Correction: Turns out the rose I have long known and loved as 'François Foucard' is something else. I don't know what. The real FF was (is?) semi-double, which matches the ancestry. I had wondered how ''l'Ideal' could father such a double rose.
by Karl K
Tue Jul 14, 2020 12:45 am
Forum: Rose Hybridizers Association Forum
Topic: First known yellow rose
Replies: 32
Views: 3281

Re: First known yellow rose

In answer to your reply Kim, it is just to muck around, if something comes of it. so be it, it is for a bit of sanity and pressure release It may be useful to know that the yellow color is due (mostly) to various carotenes. The same carotenes can be chopped and oxidized to give the powerfully scent...
by Karl K
Tue Jul 14, 2020 12:26 am
Forum: Rose Hybridizers Association Forum
Topic: First known yellow rose
Replies: 32
Views: 3281

Re: First known yellow rose

If you're meaning yellow Tea types, Parks' Yellow Tea-scented China was brought from China to the UK in 1824, ... The yellow tea-scented rose was a self-seedling of the blush tea-scented. It was raised by Dr. Cartier and listed in Cels' nursery catalog for 1817. This was almost certainly the yellow...
by Karl K
Wed Jul 08, 2020 4:11 pm
Forum: Rose Hybridizers Association Forum
Topic: Handling cold-hardiness
Replies: 10
Views: 1338

Re: Handling cold-hardiness

I live in the low desert in southern California. Cold hardiness is not an issue here, but the subject still fascinates me. I remembered one of Percy Wright's non-rose experiments that may be worth a trial. I can't do it down here, but maybe someone in the north would give it a shot. Simply stated, W...
by Karl K
Fri Jul 03, 2020 7:23 pm
Forum: Rose Hybridizers Association Forum
Topic: Handling cold-hardiness
Replies: 10
Views: 1338

Re: Handling cold-hardiness

Breeding for hardiness: Early to bed … Bugnet: The Search for Total Hardiness (1941) "I have often noticed that half-hardy plum or apple trees here, unhurt by December 1, passed unharmed through the rest of the winter no matter how intense the cold. http://bulbnrose.x10.mx/Roses/breeding/Bugnet.html...
by Karl K
Sun Jun 28, 2020 12:41 pm
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 20
Views: 2916

Re: Rebloomers genes

Transposons may be active or suppressed. In the Black Mexican sweet corn, the typical color is maintained only so long as the transposon is suppressed. Outcrossing results in variegated seeds and plants. In Four o'Clocks, the suppressed transposon prevent red stripes/sectors from being expressed. Ou...
by Karl K
Thu Jun 25, 2020 5:54 pm
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 20
Views: 2916

Re: Rebloomers genes

My assumption has been that the climbing sports of rebloomers are just a disruption of the RoKSN gene with the transposon likely excising out in one of the alleles and restoring its function. David, Another possibility is silencing/unsilencing of the transposon. That might account for some of the o...
by Karl K
Wed Jun 24, 2020 1:29 pm
Forum: Rose Hybridizers Association Forum
Topic: Polyantha alba plena sarmentosa
Replies: 1
Views: 329

Re: Polyantha alba plena sarmentosa

I found the article Guillot wrote about the parent of 'Paquerette' and some others. I don't know that this was also the parent of 'Cecile Brunner' and 'Perle d'Or', but it would be a more likely parent than a "pure" Japanese Rosa multiflora. Also, Guillot, Rambaud and Mme veuve Ducher all lived in L...
by Karl K
Tue Jun 23, 2020 12:50 pm
Forum: Rose Hybridizers Association Forum
Topic: Polyantha alba plena sarmentosa
Replies: 1
Views: 329

Polyantha alba plena sarmentosa

I recall a discussion, long time back, about this old and important variety. I have a note on the subject from May 2003: Guillot described one of his R. polyantha seedlings as having an extra row of petals, and added "sarmentosa" to the description. I think this indicates a different growth habit th...
by Karl K
Thu Jun 18, 2020 11:49 am
Forum: Rose Hybridizers Association Forum
Topic: Alternate source for repeat bloom
Replies: 28
Views: 2645

Re: Alternate source for repeat bloom

Years ago, Percy Wright did some experimenting with Rosa foliolosa. I was surprised that this southern species even survived in the Great White North. But you never know until you try. I think it was Erlanson who commented that R. foliolosa looked rather like a smaller R. palustris . Maybe the reblo...