Search found 1272 matches

by Karl K
Thu Dec 19, 2019 6:58 pm
Forum: Rose Hybridizers Association Forum
Topic: Subjective Elements of Fragrance
Replies: 10
Views: 322

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: 322

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: 63

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: 63

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: 122

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: 91

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: 142

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: 255

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: 208

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: 174

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: 1216

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: 691

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: 1216

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: 1135

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: 188

Re: Strange hips

I have seen this, now and again. Here's an example from 'Café Olé"
Image

Another oddity, a shoot growing apparently from an ovule of 'Marquise Boccella'.
Image
by Karl K
Mon Nov 04, 2019 5:14 pm
Forum: Rose Hybridizers Association Forum
Topic: Environment and gene expression
Replies: 18
Views: 1001

Re: Environment and gene expression

I was studying the structure of rosacyanins, and it occurred to me that Stoddard's (1980) gray and orange seedling might have gained its ground color from a pelargonidin-based rosacyanin. The orange margin would be callistephin [pelargonidin-3-monoglucoside], corresponding to the ruby border of 'Ang...
by Karl K
Fri Nov 01, 2019 12:42 pm
Forum: Rose Hybridizers Association Forum
Topic: Questions about seedlings traits
Replies: 19
Views: 1216

Re: Questions about seedlings traits

I edited my Pigments biblio, putting a box around the Rosacyanin articles, and another around the AVIs papers. I only had two of the latter, so I went in search of another. It's a good one. On another thread I wrote about rosacyanins and noted that when the gene-splicers persuaded roses to produce d...
by Karl K
Fri Nov 01, 2019 12:24 am
Forum: Rose Hybridizers Association Forum
Topic: Questions about seedlings traits
Replies: 19
Views: 1216

Re: Questions about seedlings traits

I was just thinking of the variability of fragrance (person to person, but also location to location) and wondering if that is true for leaves and mossing as it is for flowers? Then I read the last two items and realized it is just as true for color. I thought of Queen of Violets as, well Violette ...
by Karl K
Thu Oct 31, 2019 1:35 pm
Forum: Rose Hybridizers Association Forum
Topic: Questions about seedlings traits
Replies: 19
Views: 1216

Re: Questions about seedlings traits

I found it: Louis XIV. Sometimes velvety crimson, or velvety violet, or rarely dark brown ... depending on the weather.
http://bulbnrose.x10.mx/Roses/Rose_Pict ... isXIV.html
Image
by Karl K
Thu Oct 31, 2019 12:44 pm
Forum: Rose Hybridizers Association Forum
Topic: Questions about seedlings traits
Replies: 19
Views: 1216

Re: Questions about seedlings traits

The "secret" is probably moisture, and cooler temps. Scott-Montcrieff (1936) "The most interesting case recorded is that of the rose "Veilchenblau", which appeared to develop less blue-red flowers in the very dry 1934 season than normally. The bluer petals were separated and found to contain complex...