Search found 1814 matches

by Don
Mon Aug 26, 2019 10:49 pm
Forum: Rose Hybridizers Association Forum
Topic: Samuel-Darragh-Mcgredy-iv 1932-2019 died
Replies: 3
Views: 170

Re: Samuel-Darragh-Mcgredy-iv 1932-2019 died

Thanks for this, Henry.
by Don
Fri Aug 23, 2019 8:12 pm
Forum: Rose Hybridizers Association Forum
Topic: Grid for pollen measurement
Replies: 14
Views: 361

Re: Grid for pollen measurement

There are plenty of protocols for germinating pollen most of which are similar to the one in this linked paper. https://drive.google.com/open?id=16XRAl_yAaEzbuyB-xwTcJE45tIaEeLyp The ingredients are PGM medium: 40 mg/L H3BO3 152 mg/L CaCl2(H2O) 150 g/L-sucrose 7 g/L agar, pH 5.6 incubate at room tem...
by Don
Thu Aug 22, 2019 11:15 pm
Forum: Rose Hybridizers Association Forum
Topic: Grid for pollen measurement
Replies: 14
Views: 361

Re: Grid for pollen measurement

Way cool.

An experiment to try would be to germinate some pollen and photograph it with an eye toward determining pollen viability.
by Don
Sat Aug 10, 2019 11:25 pm
Forum: Rose Hybridizers Association Forum
Topic: Is this color prediction chart accurate (or useful)?
Replies: 9
Views: 305

Re: Is this color prediction chart accurate (or useful)?

The genetics of flower color biochemistry are pretty well understood but for any particular cultivar the genes are not. For that reason the best predictive tool is experience. In particular, Paul Barden has often posted here about what to expect from many of the roses in his own stable. Steve Mcullo...
by Don
Mon Jul 01, 2019 2:02 pm
Forum: Rose Hybridizers Association Forum
Topic: Off topic - hops breeding
Replies: 0
Views: 207

Off topic - hops breeding

Is anyone among us familiar with hops breeding? If so I would like to ask some questions. Feel free to pm me or: don at rosebreeders.org.
by Don
Tue Jun 18, 2019 12:52 pm
Forum: Rose Hybridizers Association Forum
Topic: Rosa sericea as a parent rose?
Replies: 16
Views: 1021

Re: Rosa sericea as a parent rose?

None of the cultivars of omiensis that I grew were particularly glandular. I do not recall noting scented foliage in them or in the couple of cantabrigiensis OP that I grew which originated from seed copped at Kew although the flowers were lightly fragrant on all of them.
by Don
Thu Jun 13, 2019 10:38 pm
Forum: Rose Hybridizers Association Forum
Topic: When hardiness isn't an issue...
Replies: 11
Views: 544

Re: When hardiness isn't an issue...

®Bleeding Madras?
by Don
Sat Jun 01, 2019 8:51 am
Forum: Rose Hybridizers Association Forum
Topic: R. bracteata x Carefree Copper
Replies: 15
Views: 1081

Re: R. bracteata x Carefree Copper

>> Depends on what the breeder is going for That's true but the problem with species roses is that it is often hard to get an f1 from anything at all, let alone a cultivar of choice. Cannikin, for instance, can be used as a bridge in back crosses to bring in other traits from bracteata. >> Personall...
by Don
Wed May 29, 2019 11:26 pm
Forum: Rose Hybridizers Association Forum
Topic: Seedling
Replies: 33
Views: 1829

Re: Seedling

No doubt the authorities will find them in a dumpster, emptied of their valuables.
by Don
Wed May 29, 2019 8:22 pm
Forum: Rose Hybridizers Association Forum
Topic: Seedling
Replies: 33
Views: 1829

Re: Seedling

Seems to be missing some anthers.
by Don
Tue May 28, 2019 8:47 am
Forum: Rose Hybridizers Association Forum
Topic: Seedling
Replies: 33
Views: 1829

Re: Seedling

>> Is it worth anything aesthetically? I think you should name it "Groovy". It could take on a life of it's own. https://pcdn.columbian.com/wp-content/uploads/2018/09/1002853091-portland-psychedelic_9.jpg https://www.columbian.com/news/2018/sep/23/portland-psychedelic-exhibit-a-return-to-hippie-heyd...
by Don
Fri May 24, 2019 10:55 am
Forum: Rose Hybridizers Association Forum
Topic: Best sources for virus free hybrid teas?
Replies: 3
Views: 205

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: 610

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: 610

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: 667

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: 563

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: 25
Views: 933

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: 25
Views: 933

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: 255

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: 255

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.