Search found 1803 matches

by Don
Fri May 24, 2019 10:55 am
Forum: Rose Hybridizers Association Forum
Topic: Best sources for virus free hybrid teas?
Replies: 2
Views: 45

Best sources for virus free hybrid teas?

Where would you go to buy HT's these days? Preferably they would be on multiflora or canina rootstock. I'm looking for the old favorites like Chryslers Imperial, Oklahoma, Paradise, Peace, Tiffany, Perfume Delight, Papa Meilland, Love, etc.
by Don
Mon May 13, 2019 3:07 pm
Forum: Rose Hybridizers Association Forum
Topic: Sterling Silver
Replies: 15
Views: 481

Re: Sterling Silver

Thanks for this, Karl. Hopefully someone at HMF will add the information on the second parent to the monograph for Sterling Silver.

I have not yet heard back from Deborah Kelley. I'd love to ask her if she has Gladys' breeding notes or knows where they are.
by Don
Sat May 11, 2019 9:51 am
Forum: Rose Hybridizers Association Forum
Topic: Sterling Silver
Replies: 15
Views: 481

Re: Sterling Silver

Hi Deborah, thanks very much for posting your note. You apparently posted as a guest so I can't send you a personal message via the forum and you didn't leave an email address. If you would send me a note to don@rosebreeders.org I would love to correspond with you. I have just a ton of questions.
Don
by Don
Sat May 04, 2019 3:05 am
Forum: Rose Hybridizers Association Forum
Topic: Unusual seedling
Replies: 23
Views: 405

Re: Unusual seedling

Wow.

It looks like the wave is produced by a bilateral necrotizing factor of some sort. You can see dead tissue along the fringe of white in that area of the petals. Do you have any closeup photos of nearly spent blooms?
by Don
Mon Apr 29, 2019 11:54 pm
Forum: Rose Hybridizers Association Forum
Topic: Kind of starting new
Replies: 14
Views: 354

Re: Kind of starting new

Sheesh. I wish I knew this two weeks ago. I just ripped out my entire stable except for a few hybrids that I want to focus on. ZZ/Bill Reid is my suggestion. It's really hardy for me though no doubt will be an annual for you but its the best I ever had for a winter hardy refined rose let alone a yel...
by Don
Fri Apr 26, 2019 8:46 pm
Forum: Rose Hybridizers Association Forum
Topic: R. davidii
Replies: 24
Views: 576

Re: R. davidii

Warren, does it look like Virginiana to you?
by Don
Fri Apr 26, 2019 9:43 am
Forum: Rose Hybridizers Association Forum
Topic: R. davidii
Replies: 24
Views: 576

Re: R. davidii

Do either of you have pics of the flowers?
by Don
Mon Apr 22, 2019 9:13 pm
Forum: Rose Hybridizers Association Forum
Topic: tissue culture
Replies: 7
Views: 165

Re: tissue culture

Callus can be induced by modifying the proportions of IBA, GA and kinetin in the culture medium. Roots or shoots can then be induced from the callus by changing the ratios again. My experience is with nicotiana but rosa protocols exist. I'll dredge up what I have and post them at some point, been bu...
by Don
Sun Apr 21, 2019 7:00 am
Forum: Rose Hybridizers Association Forum
Topic: tissue culture
Replies: 7
Views: 165

Re: tissue culture

I recall he claimed that roots were most likely to sprout from the tissue opposite a pair of bud eyes. Cuttings with that part of the stem exposed worked best. I'm trying to find the notes I have on it.
by Don
Sun Apr 21, 2019 12:08 am
Forum: Rose Hybridizers Association Forum
Topic: tissue culture
Replies: 7
Views: 165

Re: tissue culture

Armstrong was using it back in the last millennium as was High Country though I couldn't get much detail from High Country when I was looking into it. I think Dobros dabbled in it for Conard Pyle/Star for a bit. Weston Nurseries was using it for woodies back then too but they didn't do much in the w...
by Don
Mon Mar 25, 2019 11:16 pm
Forum: Rose Hybridizers Association Forum
Topic: Hand picked - for you!
Replies: 2
Views: 128

Hand picked - for you!

Here is a plant trial opportunity that I had not previously heard of. It's remarkable in that it is a collaborative trialing program among mostly northern state growers. It is not a brand as much as it is a mark of distinction, a so-called 'trustmark'. https://www.handpickedplants.com/about/plant-tr...
by Don
Mon Mar 25, 2019 4:37 pm
Forum: Rose Hybridizers Association Forum
Topic: Monsanto's use of genetic markers for plant breeding
Replies: 23
Views: 2313

Re: Monsanto's use of genetic markers for plant breeding

A recent development in CRISPR technology has been made public that eliminates the need for any PCR in screening for partricular genetic traits. This means no messy chemicals and stinky vent hood. https://phys.org/news/2019-03-crispr-chip-enables-digital-dna-amplification.html I think we should writ...
by Don
Thu Mar 21, 2019 11:21 am
Forum: Rose Hybridizers Association Forum
Topic: Appropriate DNA barcoding for molecular identification of rosa x damascena trigintipetala Plant growing in Taif region,
Replies: 4
Views: 101

Re: Appropriate DNA barcoding for molecular identification of rosa x damascena trigintipetala Plant growing in Taif regi

To be fair they are analyzing Kazanlik (trigentipetala) and not damascena Mill, which is what Iwata analyzed. Maybe there is something to it although the images I found for the Taif varietal show no evidence of roxburghii except for color and polypetally.
by Don
Wed Mar 20, 2019 8:34 am
Forum: Rose Hybridizers Association Forum
Topic: Can Rose Rosette Virus do this?
Replies: 1
Views: 87

Can Rose Rosette Virus do this?

Faba bean necrotic stunt virus, or FBNSV for short, infects legumes, and is spread through the bites of aphids. Its genes are split among eight segments, each of which is packaged into its own capsule....these eight segments can reproduce themselves, even if they infect different cells. FBNSV needs ...
by Don
Wed Mar 13, 2019 8:52 am
Forum: Rose Hybridizers Association Forum
Topic: Still trying to wrap my head around Canninae meiosis, and how to overcome...
Replies: 12
Views: 251

Re: Still trying to wrap my head around Canninae meiosis, and how to overcome...

>> A fertile tetraploid with sweet briar foliage would be a real triumph. I had the same thought about the pine scented R. glutinosa to which end I made a bunch of crosses with mosses. From these only the crosses with Mosseau du Japon in which glutinosa was female yielded hybrids of which I have fou...
by Don
Mon Mar 11, 2019 1:20 am
Forum: Rose Hybridizers Association Forum
Topic: Apple Crispr recipe
Replies: 0
Views: 79

Apple Crispr recipe

Scientists Thread A Nano-Needle To Modify The Genes Of Plants

https://www.npr.org/2019/03/10/70149872 ... -of-plants
by Don
Mon Mar 04, 2019 10:38 pm
Forum: Rose Hybridizers Association Forum
Topic: When will CRISPR come to roses?
Replies: 0
Views: 70

When will CRISPR come to roses?

Up until now I thought the answer was 'later rather than sooner'. A new technique using pollen to deliver CRISPR might speed things up a lot. I wonder if this technique would be limited to diploids, though. https://www.sciencemag.org/news/2019/03/corn-and-other-important-crops-can-now-be-gene-edited...
by Don
Mon Mar 04, 2019 11:50 am
Forum: Rose Hybridizers Association Forum
Topic: Bluing of red roses
Replies: 2
Views: 106

Re: Bluing of red roses

These folks attribute age related bluing in roses to be due to the cellular pH increasing with time and to quercitin complex formation over time.

https://fshs.org/proceedings-o/1985-vol ... OUSKY).pdf
by Don
Wed Feb 27, 2019 9:51 am
Forum: Rose Hybridizers Association Forum
Topic: help with i,d.?
Replies: 17
Views: 218

Re: help with i,d.?

I'm going with Koenigen van Danemark.

http://helpmefind.com/gardening/l.php?l=2.3645.7&tab=1