Rose Hybridizers Association Forum

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

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...

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...

This may help, though it has not been kept fully up-to-date.
https://www.helpmefind.com/clematis/index.php

Peter

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...

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

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

Peter

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...

https://modernroses.rose.org/Account/Lo ... ly%3DFalse

Good luck.

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

Peter

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

Peter

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...

Those who are not subscribers of cabdirect.org will have better luck with https://www.researchgate.net/publicatio ... _4_545-556

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

Peter

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

Jonathan,
I've sent the article by email,
Peter

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 ...

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...

[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 ...