Search found 1011 matches

by Peter Harris
Wed Jun 17, 2020 1:15 pm
Forum: Rose Hybridizers Association Forum
Topic: Ploidy of Isabella Skinner (Victorian Memory).
Replies: 13
Views: 673

Re: Ploidy of Isabella Skinner (Victorian Memory).

From what Kim and Riku have said, I'd guess that Isabella Skinner is triploid or at least of very confused ploidy. The pollen might work on an "easy" mother.

Peter
by Peter Harris
Wed Jun 17, 2020 10:24 am
Forum: Rose Hybridizers Association Forum
Topic: Ploidy of Isabella Skinner (Victorian Memory).
Replies: 13
Views: 673

Re: Ploidy of Isabella Skinner (Victorian Memory).

Without knowing the ploidies of the "tea" and the "floribunda" listed in its parentage, we can't really know without checking the ploidy of 'Isabella Skinner'. My guess would be that it's either triploid or (less likely but not unlikely) diploid. Rosa laxa Retzius is diploid. Does anyone know whethe...
by Peter Harris
Tue May 26, 2020 9:50 am
Forum: Rose Hybridizers Association Forum
Topic: A beginner's question
Replies: 4
Views: 376

Re: A beginner's question

If they don't have an apical growth point, they're likely never to grow. Early in my hybridizing career, I had several such, and only one of them survived. It developed a thickening between the cotyledons and eventually forced out new growth. Unfortunately, the new growth wasn't worth waiting for. A...
by Peter Harris
Wed Apr 29, 2020 4:00 pm
Forum: Rose Hybridizers Association Forum
Topic: For Love of Roses
Replies: 9
Views: 890

Re: For Love of Roses

It's my understanding from local rose society discussion that the owner has been through various personal and health problems since purchasing Whit Wells's nursery and renaming it. The nursery has been in trouble for most of its existence, stretching back at least 4 years. Roses have either not been...
by Peter Harris
Wed Oct 02, 2019 10:05 am
Forum: Rose Hybridizers Association Forum
Topic: 'ploidy question
Replies: 2
Views: 359

Re: 'ploidy question

Likely a triploid

See https://www.helpmefind.com/rose/l.php?l=2.43529.0&tab=1

Thought to be a multiflora x damask seedling. Apparently does not set many hips (typical of many triploids), and from the pictures of some hips it seems that the hips have only one or two seeds.

Peter
by Peter Harris
Thu Sep 26, 2019 1:14 pm
Forum: Rose Hybridizers Association Forum
Topic: I'm a new member.
Replies: 3
Views: 419

Re: I'm a new member.

Welcome. Tell us a little about yourself and your interests. Where do you grow roses?

Peter
by Peter Harris
Sat Mar 30, 2019 2:29 am
Forum: Rose Hybridizers Association Forum
Topic: ARS Rose Registrations
Replies: 4
Views: 446

Re: ARS Rose Registrations

David, I think it's behind a membership wall. That is, you have to be an ARS member to register for access--or pay an annual fee for access. Here is the link: https://modernroses.rose.org/ Some text from the page: [quote]The offices of The American Rose Society serve as International Cultivar Regist...
by Peter Harris
Fri Feb 22, 2019 12:08 pm
Forum: Rose Hybridizers Association Forum
Topic: help with i,d.?
Replies: 17
Views: 753

Re: help with i,d.?

You might also take a look at the Romantica roses and others introduced to take advantage of the popularity of Austins.

Peter
by Peter Harris
Wed Jan 30, 2019 11:44 pm
Forum: Rose Hybridizers Association Forum
Topic: 'Chinook Sunrise' parentage
Replies: 22
Views: 1458

Re: 'Chinook Sunrise' parentage

HMF information for 'Chinook Sunrise' has been partly updated.

Peter
by Peter Harris
Wed Jan 16, 2019 2:47 am
Forum: Rose Hybridizers Association Forum
Topic: Morden Series for health
Replies: 21
Views: 851

Re: Morden Series for health

Kim and Rob, The Mordens have a pretty good dose of R. arkansana in them, and with that comes susceptibility to rust. Rust is unsightly, but it does not kill plants in the northern zones. All the native species in Manitoba are susceptible to rust. Yet they survive and thrive. Survival and plant habi...
by Peter Harris
Wed Jan 02, 2019 9:37 am
Forum: Rose Hybridizers Association Forum
Topic: Do more richly colored seedlings have more richly colored blooms?
Replies: 16
Views: 1267

Re: Do more richly colored seedlings have more richly colored blooms?

Some of those unusually colored seedlings have turned out to be albinos. :(

Peter
by Peter Harris
Sun Dec 30, 2018 11:06 pm
Forum: Rose Hybridizers Association Forum
Topic: new member
Replies: 3
Views: 299

Re: new member

Welcome, Duane.

Cold-hardiness and disease resistance are qualities a good many of us have been breeding for, so I'm sure you'll find lots of company on this forum.

Peter
by Peter Harris
Thu Dec 06, 2018 10:34 pm
Forum: Rose Hybridizers Association Forum
Topic: Rooting Cuttings from Seedlings
Replies: 8
Views: 686

Re: Rooting Cuttings from Seedlings

Jonathan,
I've sent the article by email,
Peter
by Peter Harris
Thu Dec 06, 2018 3:03 pm
Forum: Rose Hybridizers Association Forum
Topic: Rooting Cuttings from Seedlings
Replies: 8
Views: 686

Re: Rooting Cuttings from Seedlings

I had a similar problem (root dying) and was able to save most seedlings. I wrote about this experience in "Radical Radicle Surgery" on page 15 of the Spring 1980 RHA Newsletter. My problem was gibberellic acid toxicity, not damping off. By removing the dying portion of the stem and some part above ...
by Peter Harris
Tue May 01, 2018 9:42 am
Forum: Rose Hybridizers Association Forum
Topic: The Rosa genome and insights into domestication of modern roses
Replies: 12
Views: 963

The Rosa genome and insights into domestication of modern roses

The April 30, 2018 issue of [i]Nature Ge­­­netics[/i] contains a study which concludes (this is a very simple summary that I hope is accurate) that scent, recurrent blooming, and color are controlled by some genes that work in opposition to each other, and that breeders' emphases on color and recurr...
by Peter Harris
Mon Apr 30, 2018 12:00 pm
Forum: Rose Hybridizers Association Forum
Topic: What about laevigata?
Replies: 33
Views: 2345

Re: What about laevigata?

[quote="Karl K" post_id=67757 time=1525094674 user_id=1292] Somewhere I read a note about R. laevigata hips being consumed by livestock (of some kind) and the seeds sprouting where they fell. I have tried to find it, but so far no luck. [/quote] Karl, the reason you've not had luck with that search ...