Search found 299 matches

by david zlesak
Wed Dec 12, 2018 3:08 pm
Forum: Rose Hybridizers Association Forum
Topic: PowerPoints from NCPN-Roses meetings from last summer are posted
Replies: 0
Views: 25

PowerPoints from NCPN-Roses meetings from last summer are posted

Hi Everyone!! The PowerPoint presentations from last summers National Clean Plant Network-Roses meetings are now posted. Hopefully the pictures and outlines with bullet points of the talks will provide a pretty good idea of of the messages conveyed. The RRD material I think is especially valuable fo...
by david zlesak
Mon Dec 10, 2018 8:08 pm
Forum: Rose Hybridizers Association Forum
Topic: Polstjarnan (expanded)
Replies: 11
Views: 2166

Re: Polstjarnan (expanded)

Thank you Margit for asking. I'm excited for them to bloom next year. I was hoping there'd be a little blooming this past spring, but they must have been too small. They overwintered perfectly for our relatively harsh winter, which was promising. Most all of them had a lot of leaf spot or black spot...
by david zlesak
Fri Nov 23, 2018 12:20 am
Forum: Rose Hybridizers Association Forum
Topic: Rising-Star-Honoree-David-Zlesak
Replies: 20
Views: 411

Re: Rising-Star-Honoree-David-Zlesak

That's a good question Don. We have characterized 13 different races, but there probably are a lot more. What makes a race is that the isolates comprising the race share a common set of virulence genes that can overcome the same host resistance genes. Of these 13 races, every rose we innoculated wit...
by david zlesak
Mon Nov 19, 2018 7:01 pm
Forum: Rose Hybridizers Association Forum
Topic: Rising-Star-Honoree-David-Zlesak
Replies: 20
Views: 411

Re: Rising-Star-Honoree-David-Zlesak

Thank you!! I just slipped in under the age limit. The friend that nominated me I learned did so when I was still 45 :0).
by david zlesak
Sat Nov 17, 2018 11:13 am
Forum: Rose Hybridizers Association Forum
Topic: Consistent early germination from a parent and the germination method I've been using
Replies: 1
Views: 145

Consistent early germination from a parent and the germination method I've been using

This past week I moved baggies of rose seed to the refrigerator that were at room temperature the past month or so and it is fun to see some germinating. Over the years it has been the same parent that is the precocious germinator and my indicator that I better get the rest of the seed in the fridge...
by david zlesak
Sat Nov 17, 2018 10:51 am
Forum: Rose Hybridizers Association Forum
Topic: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)
Replies: 15
Views: 362

Re: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)

It is amazing the bloom color diversity possible through Brite EyesTM. The degree of color change in your phototropic seedling is amazing Stephen.
by david zlesak
Wed Nov 14, 2018 8:35 pm
Forum: Rose Hybridizers Association Forum
Topic: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)
Replies: 15
Views: 362

Re: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)

Thank you Don for the update. From the patent the male parent is listed as Abraham DarbyTM for Brite EyesTM. Hmmm, so maybe this resistance gene that we characterized on chromosome 5 could actually be from a rugosa.
by david zlesak
Tue Nov 13, 2018 6:39 pm
Forum: Rose Hybridizers Association Forum
Topic: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)
Replies: 15
Views: 362

Re: Mapping a Novel Black Spot Resistance Locus in the Climbing Rose Brite EyesTM (‘RADbrite’)

We are excited this paper was accepted and will be in print soon. Brite EyesTM has a unique black spot resistance gene in it. Brite Eyes is tetraploid and has one copy of the allele for this gene that confers resistance and transmits it to 50% of its babies. There is one black spot race of the ~13 r...
by david zlesak
Sun Oct 07, 2018 12:47 pm
Forum: Rose Hybridizers Association Forum
Topic: Germination rate of Carefree Beauty OP?
Replies: 3
Views: 310

Re: Germination rate of Carefree Beauty OP?

For Carefree BeautyTM ('BUCbi') op seedlings in a past germination experiment I got from the 30's to 60's for percent germination. It is a relatively easy parent to germinate seeds from in my experience. http://hortsci.ashspublications.org/con ... 1.full.pdf
by david zlesak
Fri Oct 05, 2018 3:58 pm
Forum: Rose Hybridizers Association Forum
Topic: German thesis blackspot
Replies: 2
Views: 275

Re: German thesis blackspot

In 2013 Enzo was just starting his graduate research when the International Symposium on Rose Research and Cultivation was held there in Hannover. Him and other graduate students did a wonderful job helping Dr. Debener and the rest of the organizing committee host a great conference. Enzo and his me...
by david zlesak
Sat Sep 22, 2018 9:07 pm
Forum: Rose Hybridizers Association Forum
Topic: Has anyone used Secret Garden Musk Climber in breeding?
Replies: 7
Views: 438

Re: Has anyone used Secret Garden Musk Climber in breeding?

Thank you David. Kim, your hybrids look great and from your descriptions it looks like they rebloom well. Does 'Secret Garden Musk Climber' only work well as a pollen parent, or does it set seeds too?
by david zlesak
Sat Sep 22, 2018 11:42 am
Forum: Rose Hybridizers Association Forum
Topic: Has anyone used Secret Garden Musk Climber in breeding?
Replies: 7
Views: 438

Has anyone used Secret Garden Musk Climber in breeding?

Has anyone used this rose in breeding? http://www.helpmefind.com/gardening/l.php?l=2.5674 Last night at the Twin Cities Rose Club meeting Lois Ann Helgeson talked about fragrance and brought cut stems of a lot of different roses from her garden as examples that she passed around. She grows this rose...
by david zlesak
Sun Sep 16, 2018 4:06 pm
Forum: Rose Hybridizers Association Forum
Topic: First-report-of-Rose-yellow-vein-virus-in-Turkey.pdf
Replies: 1
Views: 143

Re: First-report-of-Rose-yellow-vein-virus-in-Turkey.pdf

Thank you Henry!! That is interesting RYVV has been found in damask roses in Turkey. We first found it in a plant of 'Dr. Merkeley' in MN growing for decades in someone's landscape. There are a more than the viruses under the Rose Mosaic Virus umbrella out there. Part of how we found this and some o...
by david zlesak
Fri Aug 31, 2018 4:09 pm
Forum: Rose Hybridizers Association Forum
Topic: A miR172 target-deficient AP2-like gene correlates with the double flower phenotype in roses
Replies: 1
Views: 140

Re: A miR172 target-deficient AP2-like gene correlates with the double flower phenotype in roses

Thank you for posting this Henry!! It was a treat to visit their lab in Lyon last summer. Dr. Bendahmane coordinates a wonderful team of scientists and students. They did a great job better understanding how this major gene works that leads to double flowers in roses. The rose genome that is now ava...
by david zlesak
Fri Aug 31, 2018 2:41 pm
Forum: Rose Hybridizers Association Forum
Topic: Regarding ancestry
Replies: 10
Views: 528

Re: Regarding ancestry

Great point Matt! The range of ancestral contributions as we move forward in generations sure makes the possibilities and what we can find interesting.
by david zlesak
Mon Aug 27, 2018 9:33 am
Forum: Rose Hybridizers Association Forum
Topic: Remontancy
Replies: 25
Views: 2076

Re: Remontancy

I LOVE the work you are doing Joe. Hopefully reshuffling the genes of your hybrids in future generations will lead to many hardy, healthy, reblooming hybrids with beautiful flowers. Dr. Roger Mitchell a number of years ago (perhaps he still is an RHA member, I haven't heard from him in awhile) wrote...
by david zlesak
Wed Aug 22, 2018 12:16 am
Forum: Rose Hybridizers Association Forum
Topic: The new Star Roses and Plants wholesale catalog is online
Replies: 4
Views: 296

The new Star Roses and Plants wholesale catalog is online

I love looking through catalogs to see what new roses and other plants are coming out. The 2019 Star Roses and Plants wholesale catalog is already out and freely available online! We can find it at https://issuu.com/starrosesandplants/do ... ts_catalog
by david zlesak
Fri Aug 10, 2018 11:36 am
Forum: Rose Hybridizers Association Forum
Topic: Nematode resistance
Replies: 6
Views: 326

Re: Nematode resistance

I haven't heard a lot about nematodes in roses in the North where I'm at and have the impression that Florida is particularly favorable to them and was the reason R. x fortuniana was used. Is that accurate? Do others throughout the South face nematode issues on roses? On a side note, from my underst...
by david zlesak
Fri Aug 03, 2018 7:30 pm
Forum: Rose Hybridizers Association Forum
Topic: Identification request
Replies: 7
Views: 411

Re: Identification request

Hmmm. It sure reminds me of the very hardy hybrid gallica 'Alika'.
by david zlesak
Thu Aug 02, 2018 8:47 pm
Forum: Rose Hybridizers Association Forum
Topic: Cercospora
Replies: 7
Views: 395

Re: Cercospora

I don't know of any roses in my garden that don't get any cercospora. Many rugosas seem relatively clean of it. I was in a non-sprayed garden today and Screaming Neon Red seems to have a lot less of it than a lot of other roses. I have some op seedlings of Rainbow Knock Out that seem to be relativel...