Search found 108 matches

by dgermeys
Thu Feb 04, 2021 11:21 am
Forum: Rose Hybridizers Association Forum
Topic: Alternate source for repeat bloom
Replies: 41
Views: 4279

Re: Alternate source for repeat bloom

I think it's a mistake to assume that Rosa moschata has KSN_wild. It seems you are right about that. According to the paper https://www.actahort.org/books/1232/1232_4.htm, Rosa moschata as well as Rosa rugosa problably has KSN_181, not KSN_wild, but both alleles only differ in a very small way from...
by dgermeys
Mon Feb 01, 2021 6:41 pm
Forum: Rose Hybridizers Association Forum
Topic: Alternate source for repeat bloom
Replies: 41
Views: 4279

Re: Alternate source for repeat bloom

I think it's a mistake to assume that Rosa moschata has KSN_wild. 'Champney's Pink Cluster' (which was the original cross between R. moschata and R. chinensis 'Old Blush'; I wonder... in the paper https://www.nature.com/articles/s41477-018-0166-1/ table 2 says that R. Moschata is "recurrent bloomin...
by dgermeys
Mon Feb 01, 2021 5:51 pm
Forum: Rose Hybridizers Association Forum
Topic: Alternate source for repeat bloom
Replies: 41
Views: 4279

Re: Alternate source for repeat bloom

Is R. moschata hardy for you? It starts blooming later, but keeps going until frost. Perhaps that crossed with something cold-hardy, then selfed, would give something that would work. I wonder where Blush Noisette got its rebloom from.. from Old blush or from moschata. Assuming rosa moschata has th...
by dgermeys
Mon Feb 01, 2021 3:48 pm
Forum: Rose Hybridizers Association Forum
Topic: Alternate source for repeat bloom
Replies: 41
Views: 4279

Re: Alternate source for repeat bloom

What of rosa spinossisima? Where does that rebloom at the end of the summer comes from?
by dgermeys
Sun Jan 31, 2021 4:46 am
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 24
Views: 3980

Re: Rebloomers genes

Interesting Stefan! Did you use mutabilis as a pollen parent? So alba x mutablis, expected pentaploid and then rugosa x mutabilis expected diploid? I have tried to use mutabilis last year as a sees parent with rugosa but none of these crosses take. Only a few seeds between mutabilis x palustris. Hop...
by dgermeys
Sat Jan 30, 2021 4:26 pm
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 24
Views: 3980

Re: Rebloomers genes

https://www.actahort.org/books/1064/1064_21.htm I have looked for more recent studies and have gone through many from Asia, but I can only read so many without going cross-eyed. Perhaps someone else can find an update, if there is one. https://www.researchgate.net/profile/Koji_Kawamura/publication/...
by dgermeys
Wed Jan 27, 2021 10:50 am
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 64
Views: 5243

Re: Petite Knock Out Rose - AVOID

Hmmmm, I wonder if "PKO" has been trademarked in the EU? the name of the rose is protected as "Zepeti". https://euipo.europa.eu/eSearch/#basic/1+1+1+1/100+100+100+100/zepeti The rose itself is also registered at the CVPO: https://public.plantvarieties.eu/publicConsultationDetails?registerId=2017234...
by dgermeys
Tue Jan 26, 2021 11:29 am
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 64
Views: 5243

Re: Petite Knock Out Rose - AVOID

For those who are interested, the situation in Europe made an U turn last year. Who knows, if you can convince your MPs to do the same in the USA? https://www.euractiv.com/section/agriculture-food/news/european-patent-office-endorses-eus-stance-on-conventionally-bred-plants/ "In its new opinion, the...
by dgermeys
Sun Jan 24, 2021 2:47 pm
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 64
Views: 5243

Re: Petite Knock Out Rose - AVOID

In most of the Monsanto trials, they tested for their marker genes then sued and it was up to the defendants to prove they DIDN'T plant Monsanto seeds. IF the patented plant contains marker genes, they can test for those genes. Hey Kim, alright. This I understand but that is only possible if geneti...
by dgermeys
Sun Jan 24, 2021 2:29 pm
Forum: Rose Hybridizers Association Forum
Topic: Petite Knock Out Rose - AVOID
Replies: 64
Views: 5243

Re: Petite Knock Out Rose - AVOID

One of the things I wonder about is, where is the burden of proof? Imagine I use one of the parents of this rose in my breeding program and therefor I get roses with the same kind of resistance. Suddenly they suspect something and do a DNA test. They will find out that a certain amount of DNA is equ...
by dgermeys
Sat Jan 02, 2021 5:21 pm
Forum: Rose Hybridizers Association Forum
Topic: Quite a breeding discusson on Face Book.
Replies: 6
Views: 620

Re: Quite a breeding discusson on Face Book.

I can only recommend :-)
Please make a fb account and join the group!! :-)
by dgermeys
Thu Dec 31, 2020 4:10 am
Forum: Rose Hybridizers Association Forum
Topic: Rust
Replies: 8
Views: 760

Re: Rust

I read in the paper that KORbin, aka Iceberg is resistant to rust (phragmidium tuberculatum). It would be interesting to know if it got it's resistance from Robin Hood (might be likely since it is classified as a moschata??) or Virgo.
by dgermeys
Wed Dec 16, 2020 7:46 am
Forum: Rose Hybridizers Association Forum
Topic: Baby Love seedling
Replies: 15
Views: 2722

Re: Baby Love seedling

I'm curious. Did the rose gave flowers this year? A new mini yellow rugosa hybrid?
by dgermeys
Tue Dec 15, 2020 6:03 pm
Forum: Rose Hybridizers Association Forum
Topic: Rust
Replies: 8
Views: 760

Re: Rust

I find this quite an interesting topic. I noticed that alba roses will easily get rust. Also, rosa spinosissima at my coast gets rust. A very peculiar orange color btw... and when I visited Denmark 2 yeatrs ago, I found some other wild roses, probably rosa villosa, that were also affected by rust. I...
by dgermeys
Wed Jun 17, 2020 5:21 pm
Forum: Rose Hybridizers Association Forum
Topic: Roses with relatively better Japanese beetle tolerance
Replies: 9
Views: 1251

Re: Roses with relatively better Japanese beetle tolerance

I have never seen such a Japanese beetle overhere but... I would think... if the beetles come from Japan, then there is a bigger chance that Japanese species roses are less susceptible to this insect. So I would look into rosa rugosa (hybrids) but maybe also into rosa multiflora hybrids?
by dgermeys
Wed Jun 17, 2020 4:12 pm
Forum: Rose Hybridizers Association Forum
Topic: Roses with relatively better Japanese beetle tolerance
Replies: 9
Views: 1251

Re: Roses with relatively better Japanese beetle tolerance

https://denvergardeners.wordpress.com/2017/08/08/do-japanese-beetles-prefer-some-roses-more-than-others/ In the first year of this multi-year study, the following rose cultivars were not found to be damaged by Japanese Beetles: Angel Face, Debut, Hondo, Joseph’s Coat, Mardi Gras, Picotee, Popcorn, P...
by dgermeys
Mon Mar 23, 2020 7:19 pm
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 3382

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

There are some offspring now of Brite EyesTM. I don't think Sunny Knock Out inherited Rdr4 (we tested it for resistance to races 3, 8, and 9 and it was susceptible to 3, but Brites Eyes is resistant and it seems like there is just one key major gene resistance gene in Brite Eyes), but maybe its oth...
by dgermeys
Sat Feb 15, 2020 6:07 pm
Forum: Rose Hybridizers Association Forum
Topic: How common is this?
Replies: 8
Views: 1545

Re: How common is this?

Do you know the roses 'Little Pet' and 'Félicité-Perpétue'? The last one is a climber, the first one is a mutation from it and and a mini rose, Félicité-Perpétue is only blooming once, while "Little Pet" is flowering all the time. Most of the dwarf roses flower continuously... So there are a few pos...
by dgermeys
Wed Feb 05, 2020 5:02 pm
Forum: Rose Hybridizers Association Forum
Topic: Rosa Helenae Hybrida Off Spring Success in NAmerican Cold Zones?es?
Replies: 18
Views: 2256

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

Overhere in Belgium we have 'Red Robin" and 'Pink Robin', two roses by Louis Lens, both R. helenae x Robin Hood. I don't know how hardy they actually are.