Search found 1006 matches

by Peter Harris
Wed Oct 02, 2019 10:05 am
Forum: Rose Hybridizers Association Forum
Topic: 'ploidy question
Replies: 2
Views: 183

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: 213

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: 252

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: 391

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: 789

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: 411

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: 829

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: 226

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: 426

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: 426

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: 847

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: 2109

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 ...
by Peter Harris
Sun Apr 22, 2018 10:55 pm
Forum: Rose Hybridizers Association Forum
Topic: Assessment of genetic diversity in 29 Rose germplasms using SCoT marker
Replies: 5
Views: 434

Re: Assessment of genetic diversity in 29 Rose germplasms using SCoT marker

Henry, What did you learn from reading the paper? Maybe I missed something meaningful. Perhaps you can explain it better than the authors did. As I see it, the problems with the paper have much to do with unclear plan and poor writing, nothing to do with new techniques/applications. Elsevier is simp...
by Peter Harris
Sun Apr 22, 2018 3:54 pm
Forum: Rose Hybridizers Association Forum
Topic: Assessment of genetic diversity in 29 Rose germplasms using SCoT marker
Replies: 5
Views: 434

Re: Assessment of genetic diversity in 29 Rose germplasms using SCoT marker

I have read the article in question. It is incoherent, without plan, or nearly so, and generally not worth the time one might spend in reading it. It reaches no meaningful conclusions. Apparently it will go on the co-authors' resumes as if it were of scientific value.

Peter
by Peter Harris
Fri Apr 20, 2018 11:02 pm
Forum: Rose Hybridizers Association Forum
Topic: NewFlora site down for over a month
Replies: 5
Views: 1076

Re: NewFlora site down for over a month

Don, The only 2 roses I know of from NovaFlora are 1. [b]Popcorn Drift[/b], a radiation-induced sport of Peach Drift. http://www.helpmefind.com/rose/l.php?l=2.67517.0 In the Monaco Rose Trials, it won the Silver Medal -- Groundcover (June 4, 2016) 2. [b]Bubble Double[/b], a radiation-induced sport o...
by Peter Harris
Sun Apr 15, 2018 5:52 pm
Forum: Rose Hybridizers Association Forum
Topic: High Country wishlist
Replies: 13
Views: 1048

Re: High Country wishlist

Agnes pollen has some viability. I discovered this in some crosses about 30 years ago. But I never got anything useful from the few seeds I got. See http://www.helpmefind.com/gardening/l.php?l=2.26244

Peter
by Peter Harris
Mon Apr 02, 2018 7:33 pm
Forum: Rose Hybridizers Association Forum
Topic: reblooming botanical roses
Replies: 16
Views: 1681

Re: reblooming botanical roses

The Spring 2012 [i]Rose Hybridizers Newsletter[/i] (Vol. XLIII, No. 1, pp. 17-19) has a discussion of recurrent blooming in the article entitled "Remontancy: Genetics, Species, Recommended Parents." The article was a "From the Forum" offering, including comments made by many in their posts on the fo...