Search found 389 matches

by david zlesak
Sat Jul 25, 2020 11:37 am
Forum: Rose Hybridizers Association Forum
Topic: Problem with rabbits
Replies: 3
Views: 172

Re: Problem with rabbits

I fight them too and don't have a reasonable way to put up enough really solid fencing to exclude them (dig chicken wire into the ground deep enough all around the perimeter and have the above ground fence high enough... I sometimes live trap them if there are some I notice hanging around. For deer,...
by david zlesak
Mon Jul 20, 2020 7:42 pm
Forum: Rose Hybridizers Association Forum
Topic: Jim Sproul has patented a rose
Replies: 3
Views: 321

Re: Jim Sproul has patented a rose

That's great Jim!! What will the commercial name be?
by david zlesak
Sat Jul 04, 2020 3:10 pm
Forum: Rose Hybridizers Association Forum
Topic: Rose Seed Germination
Replies: 17
Views: 938

Re: Rose Seed Germination

Hi Edgar, I like germinating in baggies too. It works well for me since I have small numbers of seeds from many crosses typically and it saves space. I like to get the seeds out of the hips relatively soon after harvest and get them into moistened peat moss in baggies. I saturate the peat and then t...
by david zlesak
Fri Jul 03, 2020 1:15 am
Forum: Rose Hybridizers Association Forum
Topic: Midas Touch as a parent
Replies: 3
Views: 459

Midas Touch as a parent

I was impressed with the petal substance and rich color of Midas Touch and bought one this spring. It would be great to learn other's experience with it. I'm trying to use it as a parent and hips seem so be starting from crosses onto it so far and the anthers seem to shed pollen. It looks like there...
by david zlesak
Sun Jun 21, 2020 10:58 am
Forum: Rose Hybridizers Association Forum
Topic: Rebloomers genes
Replies: 20
Views: 1247

Re: Rebloomers genes

I haven't heard of akbp before. I tried to do a little searching, but am having a hard time finding resources for this gene. Would you share a link or more information about it? My assumption has been that the climbing sports of rebloomers are just a disruption of the RoKSN gene with the transposon ...
by david zlesak
Tue Jun 16, 2020 9:47 am
Forum: Rose Hybridizers Association Forum
Topic: 'Banshee' for hybridizing...
Replies: 11
Views: 801

Re: 'Banshee' for hybridizing...

Hi Tom! Wow, I love your hybrid's glossy dark, large foliage and vigorous growth. It is beautiful!! How did fragrance come through the generations from 'Banshee'?
by david zlesak
Sun Jun 07, 2020 2:26 pm
Forum: Rose Hybridizers Association Forum
Topic: Roses with relatively better Japanese beetle tolerance
Replies: 9
Views: 564

Roses with relatively better Japanese beetle tolerance

A friend at the U of Minnesota is a biochemist and they are looking at biochemical components between genotypes of a specieis that differ for tolerance with the goal to understand that source of better tolerance/resistance for future deterrent sprays, etc. They are looking at grapes, birch, and I th...
by david zlesak
Tue May 26, 2020 10:26 am
Forum: Rose Hybridizers Association Forum
Topic: A beginner's question
Replies: 4
Views: 360

Re: A beginner's question

I used to have more of that than now. I germinate the seed in baggies and transplant them out as seedlings with cotyledons just opening typically. If I don't use plastic baggies or plastic domes over the trays at first it seems like the humidity drop on a sensitive seedling can dry out the growing p...
by david zlesak
Tue May 26, 2020 10:20 am
Forum: Rose Hybridizers Association Forum
Topic: Multiflora Rose review
Replies: 6
Views: 667

Re: Multiflora Rose review

Thank you Matt for all your insights and for advocating to the legislature. That sure makes a lot of sense about "closing he barn door after the horse has bolted." I'm glad there is the allowance or research and educational purposes. I got some 'Burr Multiflora' from UC Davis and their clean stock p...
by david zlesak
Sat May 16, 2020 7:29 pm
Forum: Rose Hybridizers Association Forum
Topic: Multiflora Rose review
Replies: 6
Views: 667

Re: Multiflora Rose review

Thanks for posting this nice review Henry. It was interesting to read that in MN the idea was that R. multiflora as a rootstock didn't seem to be used anymore. There are a few, more specialty, nurseries that sell roses on R. multiflora (I won't name them now). The roses actually grow very very nicel...
by david zlesak
Wed May 06, 2020 11:19 am
Forum: Rose Hybridizers Association Forum
Topic: Cläre Grammerstorf x Prairie Peace
Replies: 12
Views: 982

Re: Cläre Grammerstorf x Prairie Peace

Wow!! It is very beautiful. What a great color. The foliage looks wonderful too. What a nice dark glossy green color contrast.
by david zlesak
Sun May 03, 2020 12:01 pm
Forum: Rose Hybridizers Association Forum
Topic: Alternate source for repeat bloom
Replies: 28
Views: 2002

Re: Alternate source for repeat bloom

The findings/interpretation of these researchers is different than Dr. Foucher's team's work in Angers, France. I wonder if maybe these researchers just saw that the same mutation wasn't in R. rugosa and for some reason assumed what R. rugosa had/was "wild" type. Their paper was a number of years ag...
by david zlesak
Thu Apr 09, 2020 6:22 pm
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

Hi Jim! Thank you!! It is fun to do and be a part of the learning process, even though how a person can fully implement and use certain technologies can be a bit up in the air for awhile as other tools are advanced too. Jason Zurn and Nahla Bassil have taken the lead on the molecular components and ...
by david zlesak
Thu Apr 09, 2020 12:08 pm
Forum: Rose Hybridizers Association Forum
Topic: Question, disease culling, end of season.
Replies: 3
Views: 391

Re: Question, disease culling, end of season.

Hi Plazbo, At least in the climate I'm in, not worrying so much about end of season spots has been the general attitude of most breeders. If the rose can hold off disease from exploding for most of the season and it builds a bit by fall, that suggests some good horizontal resistance, which is valuab...
by david zlesak
Mon Apr 06, 2020 4:31 pm
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

Hi Marty, I'm looking through my notes for roses I tried to do chromosome counts on. I want to redo Grand Amore to make sure, but out of what I could tell from the better spread cells it looked like Grand Amore was triploid. Maybe that could be contributing to it being a challenging female. I'd love...
by david zlesak
Mon Apr 06, 2020 10:40 am
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

We have a race here in MN/WI that overcomes Rdr3 ('Sunsprite' and 'George Vancouver') too and is very widespread now throughout the region. Years back I used 'George Vancouver' a lot, but then when the race swept through it and most of the seedlings went down pretty hard. For Rdr4 Brite EyesTM gets ...
by david zlesak
Thu Mar 19, 2020 10:41 am
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

That's a great question Plazbo. Yes, that sounds like a good plan and what Will I think has done in his work in some of his lines. As he takes his healthier key parents that likely have multiple dominant genes and cross them with standard modern roses that for instance have unique colors (like to br...
by david zlesak
Mon Mar 16, 2020 7:11 pm
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

Good point about R. multiflora. That is where Debener first got Rdr1 from and characterized it. They followed the gene through generations. There was chromosome doubling along the way as they got the gene introgressed into some tetraploid modern rose hybrid genetics. Due to the pattern of infection ...
by david zlesak
Mon Mar 16, 2020 3:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

Good question Don. There isn't a good complied list of roses for each Rdr. That would be great to develop as we use the markers developed for each gene to test more cultivars. This list for Rdr3 I suspect is the most extensive list for any of the Rdr genes to date as we surveyed a number of roses to...
by david zlesak
Fri Mar 13, 2020 1:21 pm
Forum: Rose Hybridizers Association Forum
Topic: Unique black spot resistance gene from 'George Vancouver' is better characterized
Replies: 19
Views: 1705

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

Hi Everyone! It has been a long path to get to this point. We learned that the black spot resistance gene in 'George Vancouver' is in a unique portion of the rose genome compared to the other characterized genes to date, we developed some DNA markers to test for Rdr3, and tested some additional rose...