Search found 30 matches

by AtlasMD
Sun Apr 08, 2018 11:14 pm
Forum: Rose Hybridizers Association Forum
Topic: patent law confusion
Replies: 4
Views: 468

Re: patent law confusion

David is right--it's the filing date, now, not the grant date. Evidently this was changed when it was altered from 17 years from patent grant date to 20 years from patent filing. See "History of Changes to Patent Terms" in the link below: https://www.uspto.gov/patent/laws-and-regulations/patent-term...
by AtlasMD
Sat Apr 07, 2018 9:55 pm
Forum: Rose Hybridizers Association Forum
Topic: patent law confusion
Replies: 4
Views: 468

Re: patent law confusion

The official countdown is from the patent date--so in the example above, the plant would be under patent protection until October 2022. However, provisional patent protection also extends to the beginning of the application process; this is why plant listings or tags are often accompanied by the acr...
by AtlasMD
Mon Apr 02, 2018 10:25 pm
Forum: Rose Hybridizers Association Forum
Topic: reblooming botanical roses
Replies: 16
Views: 1681

Re: reblooming botanical roses

Hi Dane, The only attempts I've made at using R. fedtschenkoana as a seed parent failed miserably (has anyone had better luck?), so my suspicion is that it might be more productive as a pollen parent. From its descendants it seems to cross with a fairly wide range of roses, so any workable seed pare...
by AtlasMD
Fri Mar 23, 2018 8:24 am
Forum: Rose Hybridizers Association Forum
Topic: reblooming botanical roses
Replies: 16
Views: 1681

Re: reblooming botanical roses

I forgot to mention one more relatively familiar example, the double form of the chestnut rose (R. roxburghii f. roxburghii), which unlike single forms of the species, is practically everblooming. That could be related to its lack of seed production, although it does produce a number of seedless, un...
by AtlasMD
Fri Mar 23, 2018 1:47 am
Forum: Rose Hybridizers Association Forum
Topic: reblooming botanical roses
Replies: 16
Views: 1681

Re: reblooming botanical roses

Of course, there are at least the three relatively widely-grown species that repeat as a rule: R. rugosa, R. moschata, and R. bracteata. The musk rose (R. moschata) was introduced to Europe before the China and, long before that, contributed to the hybrid R. × damascena, which has (variably) repeat-...
by AtlasMD
Sat Apr 06, 2013 9:45 pm
Forum: Rose Hybridizers Association Forum
Topic: starting a breeding program (cold-hardiness)
Replies: 64
Views: 8376

Re: starting a breeding program (cold-hardiness)

I do think that Hurst's septet theory was an interesting one in his day, but I also think it's probably about as wrong as flat Earth theory. Modern genetics is much more useful and now that some serious data is becoming widely available, we should be able to put Hurst away in his historical box. Ste...
by AtlasMD
Sat Apr 06, 2013 1:00 pm
Forum: Rose Hybridizers Association Forum
Topic: starting a breeding program (cold-hardiness)
Replies: 64
Views: 8376

Re: starting a breeding program (cold-hardiness)

Karl, I wonder if the Rosa laxa mentioned by Froebel isn't actually the "Rosa laxa" (non Retzius) of mostly European rootstock use, a Section Caninae rose that has sometimes been called Rosa coriifolia var. froebelii : http://www.helpmefind.com/rose/pl.php?n=49400 . The true Rosa laxa Retz. suckers ...
by AtlasMD
Thu Mar 21, 2013 6:42 am
Forum: Rose Hybridizers Association Forum
Topic: Hardiness rating of 'Topaz Jewel'
Replies: 14
Views: 1308

Re: Hardiness rating of 'Topaz Jewel'

When I grew it in Minnesota (sometimes winters were 4a, sometimes 4b, sometimes 5a or even 5b depending on the year) it would usually come through with tip dieback to slightly more moderate dieback on the healthiest canes--something that probably needed pruning back regardless. However, it always ha...
by AtlasMD
Sun Mar 17, 2013 9:01 pm
Forum: Rose Hybridizers Association Forum
Topic: First germination
Replies: 215
Views: 27793

Re: First germination

Johannes, it's sad to see all of those gaps in your seedling flat--I think this was posted around the RHA forum some years ago, but maybe this would give you a safer alternative:

Fish emulsion to combat damping off

Stefan
by AtlasMD
Fri Mar 15, 2013 9:24 pm
Forum: Rose Hybridizers Association Forum
Topic: First germination
Replies: 215
Views: 27793

Re: First germination

Lucasz, those are some awesome crosses and beautiful pictures! I can really see the creativity in combining hardiness, disease resistance, and fragrance. Is the Fr.Roger photograph one of your 'Fruhlingsgold' crosses? Hopefully, there will be other breeders in Europe who will see your message and wi...
by AtlasMD
Wed Mar 13, 2013 8:24 pm
Forum: Rose Hybridizers Association Forum
Topic: Hanging basket rose?
Replies: 14
Views: 1318

Re: Hanging basket rose?

I really like the idea, but I'd be worried about one thing that nothing short of chemical intervention is likely to help with. No matter how disease resistant the roses are, they won't be able to withstand the onslaught of spider mites that will inevitably occur as the baskets suffer from inconsiste...
by AtlasMD
Sun Mar 10, 2013 12:10 pm
Forum: Rose Hybridizers Association Forum
Topic: Ploidy of Prairie Dawn
Replies: 44
Views: 4748

Re: Ploidy of Prairie Dawn

'Prairie Dawn' is said to have very good repeat bloom, at least as a mature plant. Based on the parentage it's very difficult to say if it would give rise to seedlings that bloom in their first season, though. On a 'Prairie Dawn'-related note, I have some ongoing questions about the plants used in b...
by AtlasMD
Sat Mar 09, 2013 8:51 pm
Forum: Rose Hybridizers Association Forum
Topic: Obvious crosses you KNOW someone has tried...
Replies: 29
Views: 2877

Re: Obvious crosses you KNOW someone has tried...

LOL, 'Polstjarnan' x 'Topaz Jewel'? It would probably be easier to cross a dinosaur with an aardvark! :-)

Stefan
by AtlasMD
Sat Mar 09, 2013 8:38 pm
Forum: Rose Hybridizers Association Forum
Topic: Ploidy of Prairie Dawn
Replies: 44
Views: 4748

Re: Ploidy of Prairie Dawn

Thanks Johannes, that is helpful! I remember how bad most Morden roses were back home in Minnesota; I never understood why they were so popular there, but I guess that living among the trees probably increased the black spot pressure quite a bit for me (it was always more humid and less windy than s...
by AtlasMD
Sat Mar 09, 2013 12:28 pm
Forum: Rose Hybridizers Association Forum
Topic: Ploidy of Prairie Dawn
Replies: 44
Views: 4748

Re: Ploidy of Prairie Dawn

Johannes, how bad is the black spot on 'Prairie Dawn'? My plant is still young, but hasn't been especially disease prone so far. I'm curious what might be in store for it.

Stefan
by AtlasMD
Sat Mar 02, 2013 7:35 pm
Forum: Rose Hybridizers Association Forum
Topic: What I like about this Rose
Replies: 10
Views: 857

Re: What I like about this Rose

That is absolutely lovely, Warren. Did it capture any fragrance from its parents?

Stefan
by AtlasMD
Sat Mar 02, 2013 7:18 pm
Forum: Rose Hybridizers Association Forum
Topic: Rosa aschersoniana
Replies: 17
Views: 1494

Re: Rosa aschersoniana

Sorry Paul, I didn't mean to "catch" you at anything! I grew up in Elk River and was curious if you really did get that cold over there recently. I can only remember one winter in the 20+ years I lived in Minnesota that we dropped over the zone 3 threshhold, and that was in the 90s... my parents kee...
by AtlasMD
Sat Mar 02, 2013 10:22 am
Forum: Rose Hybridizers Association Forum
Topic: Rosa aschersoniana
Replies: 17
Views: 1494

Re: Rosa aschersoniana

Wow, Paul--did you really get down to -35 in Cokato? It's great to know that Rosa blanda can donate that kind of hardiness even when working with fairly tender cultivars.
by AtlasMD
Sat Mar 02, 2013 8:18 am
Forum: Rose Hybridizers Association Forum
Topic: Maybe a New Way of Breeding Hybrid Hulthemias
Replies: 28
Views: 2237

Re: Maybe a New Way of Breeding Hybrid Hulthemias

Hi Warren, You said that " I have wondered if there was an alternative way of breeding Hulthemia Hybrids from what has already been achieved.I noticed that most hybrids were developed using a lot of multiflora hybrids as the pollinators. it was not about poor health but the hint that most early Hult...
by AtlasMD
Fri Mar 01, 2013 9:22 pm
Forum: Rose Hybridizers Association Forum
Topic: Maybe a New Way of Breeding Hybrid Hulthemias
Replies: 28
Views: 2237

Re: Maybe a New Way of Breeding Hybrid Hulthemias

True, Kim, especially if the germplasm is already at the disposal...