Search found 84 matches

by dgermeys
Mon Apr 24, 2017 10:22 am
Forum: Rose Hybridizers Association Forum
Topic: Morning Blush ™ (Alba, Sievers, 1974) × Whimsy
Replies: 20
Views: 2195

Re: Morning Blush ™ (Alba, Sievers, 1974) × Whimsy

Rob Byrnes wrote: I'm looking to use these to breed with miniatures and small shrubs with increased health. Hopefully repeat bloom in F2.
Try to cross it with "Rosa rouletii Correvon". If I am not mistaken, all roses that have been crossed with this one are repeat blooming ;-)
by dgermeys
Mon Apr 24, 2017 7:35 am
Forum: Rose Hybridizers Association Forum
Topic: New Roses in Crosses This Year
Replies: 6
Views: 1046

Re: New Roses in Crosses This Year

Hi Jim! Very curious about Desdemona! I have been in doubt but did not buy the rose. Let us know if she is a good pollen or seed plant! Planning to work with 'Paula Vapelle' and 'Karl Förster' (among others), and if my rose 'Duchesse De Montebello' wants to flower this year (it refused last year), I...
by dgermeys
Mon Apr 24, 2017 7:26 am
Forum: Rose Hybridizers Association Forum
Topic: Morning Blush ™ (Alba, Sievers, 1974) × Whimsy
Replies: 20
Views: 2195

Re: Morning Blush ™ (Alba, Sievers, 1974) × Whimsy

Hey Rob,

interesting! If it would be a repeat bloomer, let us know! I doubt it, but you never now :-)
by dgermeys
Wed Apr 19, 2017 3:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Rosa davidii Hybrids
Replies: 31
Views: 4941

Re: Rosa davidii Hybrids

Warren wrote:This is a cross I did last year now in its 1st growth cycle. (Wendy X Altissimo) X R. davidii. Vigour and health are very good.
Love this rose Warren! Seems very healty. Do you you think it could be grown as a climber?
by dgermeys
Mon Apr 10, 2017 2:43 am
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

But then again, how is it possible that a cell can perform the mitosis but not a meiosis?
by dgermeys
Sun Apr 09, 2017 5:19 pm
Forum: Rose Hybridizers Association Forum
Topic: Gemini x Prairie Princess
Replies: 12
Views: 1837

Re: Gemini x Prairie Princess

jbergeson wrote:I keep looking for a "like" button. I've been facebookized.
Haha! Yes, we should have that! :-p
by dgermeys
Sun Apr 09, 2017 5:17 pm
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

Hey Karl, Parsons' Pink China is a diploid with 14 chromosomes in the body-cells and 7 in both the male and female germ-cells. Although a diploid, its chromosomes are not regular in their behaviour and weak pairings in the germ-cell divisions lead to defective pollen and embryo-sacs and consequent s...
by dgermeys
Sat Apr 08, 2017 6:26 pm
Forum: Rose Hybridizers Association Forum
Topic: Gemini x Prairie Princess
Replies: 12
Views: 1837

Re: Gemini x Prairie Princess

lovely!
by dgermeys
Sat Apr 08, 2017 6:24 pm
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

Karl, thanks for the extra information! Don, one might call the septets a distraction, but would you say that is entirely wrong? Rosa Rugosa (diploid) is clearly totally different than rosa Arvensis (also diploid), and I believe, when one would compare the chromosones in offsprings of them, what wou...
by dgermeys
Fri Apr 07, 2017 5:12 pm
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

Keep in mind that Hurst's genetic concepts are archaic relative to the state of the art and that that Earlinson disproved his septet hypothesis eighty years ago. Hey Don, Appearantly, the idea of septepts was revived. In 2011 the paper "Application of the Septet Classification System on Rose Cultiv...
by dgermeys
Wed Apr 05, 2017 2:16 pm
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

Hi Don, I did not know that Hurst was disproved. :-( But still... there might be some truth in his ideas? Do you know this article already? One interesting insight is that "Bivalent formation appears to involve chromosomes that consistently share the same microsatellite alleles." Nybom et al. (2006)...
by dgermeys
Tue Apr 04, 2017 5:45 pm
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

The distinctive Caninae Meiosis is not a simple matter of chromosome number. It requires a suppression of chromosome pairing that is presumably under genetic control. For a Caninae pentaploid, this means two sets of chromosome pair normally, while the other three sets (21 chromosomes) remain unpair...
by dgermeys
Fri Mar 31, 2017 6:36 pm
Forum: Rose Hybridizers Association Forum
Topic: Spiral Thorn Pattern
Replies: 9
Views: 1253

Re: Spiral Thorn Pattern

interesting!
by dgermeys
Fri Mar 31, 2017 5:36 am
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

Thanks Karl for the references! I'll check them out later if I can find the time. :-) I still don't quite entirely understand the Canina meiosis but I found a text in Dutch that has a chapter about propagation so I'm gonna study that one first. for those who understand Dutch: http://www.ecologischad...
by dgermeys
Fri Mar 31, 2017 5:28 am
Forum: Rose Hybridizers Association Forum
Topic: R. moyesii 'Highdownensis'
Replies: 36
Views: 3964

Re: R. moyesii 'Highdownensis'

>> I think I will try to use it as a seed plant, as wel as a pollen plant. FWIW I never got Moyesii to set seed with a foreign pollen including pollen from f1 x moyesii crosses. Yesterday I learnt that Moyesii as well as rugosa roses are both in the section Cinnamomeae. So I'm guessing that Moyesii...
by dgermeys
Fri Mar 24, 2017 4:10 pm
Forum: Rose Hybridizers Association Forum
Topic: News on genetic mapping of roses research
Replies: 3
Views: 763

Re: News on genetic mapping of roses research

Thank you! Heavy stuff but seems worth to have a look at it :-)
by dgermeys
Mon Mar 20, 2017 7:51 am
Forum: Rose Hybridizers Association Forum
Topic: Rosa arvensis breeding
Replies: 21
Views: 2037

Re: Rosa arvensis breeding

Hey David, I'm planning to buy R. arvensis 'Splendens' to give it a try. This seems a very beautiful rose and hopefully also shade resistant. I have no idea of the ploidy levels though. R. arvensis is diploid. Also, I'm thinking of combining moyesii 'Highdownensis' with arvensis, not sure yet wich o...
by dgermeys
Sun Mar 19, 2017 7:34 am
Forum: Rose Hybridizers Association Forum
Topic: Rosa arvensis breeding
Replies: 21
Views: 2037

Re: Rosa arvensis breeding

Hi,

I see this is on old topic, but I am wondering, did anyone breed since 2004 with Rosa arvensis or with any Ayrshires?

Dane.
by dgermeys
Wed Mar 15, 2017 8:21 am
Forum: Rose Hybridizers Association Forum
Topic: R. rugosa Alba x Dr Harry Upshall
Replies: 18
Views: 3051

Re: R. rugosa Alba x Dr Harry Upshall

It's just a guess, but I believe she might continously flowering, but maybe also not winterhard?
It seems the seed did not went into dormancy, so maybe the rose also will not want to go into dormancy during the winter...

very fascinating!

Dane
by dgermeys
Wed Mar 15, 2017 8:16 am
Forum: Rose Hybridizers Association Forum
Topic: R. rugosa Alba x Dr Harry Upshall
Replies: 18
Views: 3051

Re: R. rugosa Alba x Dr Harry Upshall

Waauw André,

a very nice and strong new rose! Wondering if it will be continously blooming.
I don't know if the prickles have anything to do with the R.foetida influence...

Keep us updated! :)