Search found 1337 matches

by Karl K
Thu Jan 02, 2020 12:48 am
Forum: Rose Hybridizers Association Forum
Topic: Finally a splotch!
Replies: 33
Views: 2628

Re: Finally a splotch!

I understand that the Moore Halo and the Hulthemia Blotch are different patterns. Has anyone tried combining them to learn whether there is some interaction?
by Karl K
Wed Jan 01, 2020 12:46 pm
Forum: Rose Hybridizers Association Forum
Topic: Thesis- “Characterisation and genetic improvement in Rose(Rosa spp.) through mutagenesis”
Replies: 5
Views: 580

Re: Thesis- “Characterisation and genetic improvement in Rose(Rosa spp.) through mutagenesis”

As I recall, I first read about mutations in the Golden Book Encyclopedia when I was in 2nd grade. I was fascinated! Over the years I read what I could find, including the suggestion that the glow-in-the-dark paint on old radium-dial watches could induce mutations. It's just as well that I never fou...
by Karl K
Mon Dec 30, 2019 3:50 pm
Forum: Rose Hybridizers Association Forum
Topic: All A'Twitter x Yatkan
Replies: 35
Views: 2353

Re: All A'Twitter x Yatkan

I don't know if it's the heat wave or the excessive amounts of pollen (ie 2 or 3 times a day for 5 days...seemed easier than looking for pollen that may or may not be found) but I have hip set on Crested Moss that I got this year. A lot of them seem to be phantom pregrancies (ie I can't imagine see...
by Karl K
Sat Dec 28, 2019 2:00 pm
Forum: Rose Hybridizers Association Forum
Topic: All A'Twitter x Yatkan
Replies: 35
Views: 2353

Re: All A'Twitter x Yatkan

In warmer climates (india, pakistan) centifolia reportedly sets hips, the cause of that Im not sure of. Its likely fuss in what pollen it accepts and heat stresses can alter how blooms develop ... I remembered a comment that seems to be appropriate here. Rowley (1960) wrote about triploid roses. Hi...
by Karl K
Fri Dec 20, 2019 12:41 pm
Forum: Rose Hybridizers Association Forum
Topic: Subjective Elements of Fragrance
Replies: 10
Views: 548

Re: Subjective Elements of Fragrance

Rose perfume is far more complex than we might think. Years ago I read that there were three components that were mostly responsible for the "attar of rose" perfume. Turns out those are really minor components when measured by "head space" (contribution to perceived fragrance) rather than by volume....
by Karl K
Thu Dec 19, 2019 6:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Subjective Elements of Fragrance
Replies: 10
Views: 548

Re: Subjective Elements of Fragrance

Perhaps, but the alternative meaning ... the one left alone at the dance ... is not so reassuring.
by Karl K
Thu Dec 19, 2019 1:16 pm
Forum: Rose Hybridizers Association Forum
Topic: Subjective Elements of Fragrance
Replies: 10
Views: 548

Re: Subjective Elements of Fragrance

Fragrance is largely subjective, and opinions cannot often be communicated effectively. I once read a list of perfumes that made no sense to me. How could a rose smell like red ink? Face powder might be applied to 'Sterling Silver', if you can remember your grandmothers face powder. I read somewhere...
by Karl K
Sat Dec 14, 2019 3:28 pm
Forum: Rose Hybridizers Association Forum
Topic: Genome plasticity during the acquisition of embryogenic competence
Replies: 1
Views: 114

Re: Genome plasticity during the acquisition of embryogenic competence

Mol Gen Genet. 20: 246(6): 657-62. (Mar 20, 1995) On the occurrence of somatic meiosis in embryogenic carrot cell cultures. Giorgetti L, Vergara MR, Evangelista M, Lo Schiavo F, Terzi M, Nuti Ronchi V. Istituto di Mutagenesi e Differenziamento CNR, Pisa, Italy. Abstract During the establishment of a...
by Karl K
Thu Dec 12, 2019 11:53 am
Forum: Rose Hybridizers Association Forum
Topic: Genome plasticity during the acquisition of embryogenic competence
Replies: 1
Views: 114

Genome plasticity during the acquisition of embryogenic competence

And another oldie. The relevance is that plants regenerated from adventitious shoots (e.g., root cuttings) pass through an embryonic phase, during which the pattern of expressed/unexpressed genes can be altered, resulting in sports. 'Happenstance' (from Mermaid) and 'New Dawn' (from Dr. W. van Fleet...
by Karl K
Thu Dec 12, 2019 11:42 am
Forum: Rose Hybridizers Association Forum
Topic: Topophysis affects the Potential of Axillary Bud Growth, Fresh Biomass Accumulation and Specific Fresh Weight in Single-
Replies: 0
Views: 753

Topophysis affects the Potential of Axillary Bud Growth, Fresh Biomass Accumulation and Specific Fresh Weight in Single-

Another one from the vault: Annals of Botany 78: 215–222, 1996 Topophysis affects the Potential of Axillary Bud Growth, Fresh Biomass Accumulation and Specific Fresh Weight in Single-stem Roses (L.)  BREDMOSE NIELS  and  HANSEN JÜRGEN Abstract Topophysis, the effect on growth and differentiation of ...
by Karl K
Wed Dec 11, 2019 5:12 pm
Forum: Rose Hybridizers Association Forum
Topic: Genomics Approach to Discovering Novel Floral Fragrance–Related Genes
Replies: 0
Views: 684

Genomics Approach to Discovering Novel Floral Fragrance–Related Genes

I was going through my notes and found this one I collected in March 2004. I'm a little behind in my work. http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=151220 Plant Cell. 2002 Oct; 14(10): 2325–2338. Rose Scent: Genomics Approach to Discovering Novel Floral Fragrance–Related Genes Guter...
by Karl K
Sat Nov 30, 2019 5:37 pm
Forum: Rose Hybridizers Association Forum
Topic: Preserving Pollen
Replies: 0
Views: 747

Preserving Pollen

The Horticultural Review and Botanical Magazine 4: 136-138 (Jan 1854) Hybridizing. — Saving Pollen. Donald Beaton We have numerous accounts on record of seeds having vegetated after long periods of rest, away from atmospheric changes, after being boiled for different lengths of time, and after resi...
by Karl K
Sat Nov 30, 2019 5:12 pm
Forum: Rose Hybridizers Association Forum
Topic: New rooting research
Replies: 3
Views: 358

Re: New rooting research

This old paper may supplement the info on when and what part of a cane is most likely to root. Tukey & Green: Gradient composition of rose shoots (1934) http://bulbnrose.x10.mx/Roses/breeding/TukeyRoses1934/TukeyRoses1934.html It seems that the stored carbohydrates may contribute to rooting, just as...
by Karl K
Sat Nov 23, 2019 12:01 pm
Forum: Rose Hybridizers Association Forum
Topic: How important is own root
Replies: 3
Views: 302

Re: How important is own root

It is a bit amusing (or pathetic) that people can forget that evolutionary adaptation occurs even when we are not paying attention. In the late 19th to early 20th century, Sweetpea breeders were so obsessed with larger flowers and more interesting colors, they failed to notice that some of their "be...
by Karl K
Fri Nov 22, 2019 10:07 am
Forum: Rose Hybridizers Association Forum
Topic: How common are sports?
Replies: 3
Views: 263

Re: How common are sports?

Some "sports" are reversions. It is worth checking the parentage in such cases. For example, the Polyantha 'White Koster' frequently sports red. It often appears as a red streak, a few red petals or a bloom that is all or mostly red. I once had 'Mothersday' sport a white petal. And once I had 'Margo...
by Karl K
Fri Nov 15, 2019 4:20 pm
Forum: Rose Hybridizers Association Forum
Topic: Questions about seedlings traits
Replies: 19
Views: 1523

Re: Questions about seedlings traits

We rosarians don't have to wait for a 5gt mutant. The 3,5-diglucosides and 3-monoglucosides rely on different enzymes (genes). So, we could select for 3-monoglucosides only, and let the AVIs happen. It seems I commented too early on this point. Checking the available data, the only rose that comes ...
by Karl K
Tue Nov 12, 2019 3:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Basye's "Probable Amphidiploid" now extinct?
Replies: 21
Views: 1104

Re: Basye's "Probable Amphidiploid" now extinct?

On the more hopeful side, another such amphidiploid (probable or genuine) could be produced by anyone who had the right "parts". While checking on possible progeny of Basye's plant, I saw what appears to be something even more interesting: Kim Rupert's self-seedling from Basye's. White (mostly) and ...
by Karl K
Sun Nov 10, 2019 1:17 pm
Forum: Rose Hybridizers Association Forum
Topic: Questions about seedlings traits
Replies: 19
Views: 1523

Re: Questions about seedlings traits

And more info on AVIs: Molecular Plant 3(1): 78-90 (Jan 2010) The Formation of Anthocyanic Vacuolar Inclusions in Arabidopsis thaliana and Implications for the Sequestration of Anthocyanin Pigments Lucille Pourcel, Niloufer G. Irani, Yuhua Lu, Ken Riedl, Steve Schwartz, Erich Grotewold ABSTRACT Anth...
by Karl K
Thu Nov 07, 2019 5:09 pm
Forum: Rose Hybridizers Association Forum
Topic: Question about seed ripening and pollen parent
Replies: 16
Views: 1484

Re: Question about seed ripening and pollen parent

Acta Horticulturae 961(961): 593-598 (Oct 2012) Immature seed rescue and abscissic acid quantification in Rosa hybrida L. suggest early and transient endodormancy. Luca Pipino, Marie-Christine Van Labeke, Andrea Mansuino Abstract: Breeding is a long process in the rose industry. Premature death of d...
by Karl K
Wed Nov 06, 2019 1:09 am
Forum: Rose Hybridizers Association Forum
Topic: Strange hips
Replies: 4
Views: 272

Re: Strange hips

I have seen this, now and again. Here's an example from 'Café Olé"
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Another oddity, a shoot growing apparently from an ovule of 'Marquise Boccella'.
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